BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Direct Photon Measurements at PHENIX DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-344@cern.ch DESCRIPTION:Speakers: SAHLMUELLER\, Baldo ()\nDirect photons are a unique probe that allows studying the different stage of ultrarelativistic heavy- ion collisions. The direct photon yield is sensitive to different producti on mechanisms\, which dominate the expected direct photon spectra at diffe rent transverse momenta. Their production is also influenced by modificati ons of the initial state in heavy nuclei. Such modifications can be studie d in d+Au collisions\, and their understanding is crucial for interpreting heavy-ion data.\n\nPHENIX has measured the spectra of direct photons in d ifferent collision systems and at different energies\, over a broad range of transverse momentum. Photons were measured with different methods\, usi ng different subsystems\, to extend the range of transverse momentum and t o minimize the size of systematic uncertainties. In p+p collisions\, PHEN IX has also measured isolated direct photons\, as well as the fraction of direct photons from jet fragmentation.\n\nIn this poster\, we will present the latest results on direct photon measurements\, in heavy-ion collision s as well as in p+p and d+Au collisions\, and compare the results with the oretical models.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId =344&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=344&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Decomposition of flow and non flow in di-hardon correlations at RH IC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-345@cern.ch DESCRIPTION:Speakers: DE SILVA\, Chanaka (Wayne State University)\nAngular di-hadron correlation studies in Au+Au collisions at 200 GeV have reveale d a nearisde elongated structure in delta eta. This is often referred to a s the ridge\, and was found to extend to delta eta 9 units at the LHC. Usi ng preliminary STAR data [3]\, we discuss methods to decompose 2D di-hadro n correlations in Au+Au 200 GeV collisions on the nearside. Our analysis i s performed as a function of centrality and pT. We propose a model that en compasses azimuthal flow up to 4 orders (v1\, v2\, v3\, and v4). The remai nder of the correlation function is modeled via an asymmetric 2d Gaussian\ , which we refer to as non-flow. We find our model describes the data very well. The extracted flow parameters are compared to model predictions [4\ ,5]. We investigate possible scalings for the Gaussian remainder\, and com pare it's properties to a similar structure observed in p+p 200 GeV collis ions. These findings will help us shed on the production mechanism of the remainder. Finally\, we will provide an estimate of the ratio of non-flow to flow as a function of centrality and pT\, which will aid a variety of o ther flow studies at these energies.\n\n[1] B. I. Abelev et al. (STAR Coll aboration)\, Phys. Rev. C 80\, 064912 (2009)\n[2] M. Daugherity (for the S TAR Collaboration)\, J. Phys. G: Nucl. Part. Phys. 35 104090 (2008) \n[3] L. C. De Silva\, for the STAR collaboration\n[4] B. Alver et al.\, Phys. Rev. C 81\, 054905 (2010)\n[5] C. Gombeaud et al.\, Phys. Rev. C 81\, 0149 01 (2010)\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=345&se ssionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=345&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Direct photon capabilities of the proposed MPC-EX detector at PHEN IX DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-346@cern.ch DESCRIPTION:Speakers: CAMPBELL\, Sarah (I)\nThe proposed MPC-EX detector i s a Si-W preshower extension to PHENIX's existing Muon Piston Calorimeter (MPC). The MPC-EX consists of eight layers of alternating W absorber and Si mini-pad sensors. Located at large rapidities\, 3.1 80 GeV\, a facto r of four improvement over current capabilities. Not only will the MPC-EX strengthen PHENIX's existing forward $\\pi^0$ and jet measurements\, it a lso provides the necessary $\\pi^0$ rejection to make a direct photon meas urement feasible. With this $\\pi^0$ rejection\, direct photon yields at high $p_{T}$\, $p_{T}$ > 3 GeV\, can be statistically extracted using a do uble ratio method. The direct photon $R_{dAu}$ measured with the MPC-EX w ill quantify the level of gluon shadowing or saturation in the Au nucleus at low-x\, x ~ 10^-3\, with a projected systematic error band a factor of four smaller than EPS09’s current allowable range. Direct photons at fo rward rapidities are optimally sensitive to the gluon distribution because \, unlike pions\, direct photons are only produced by processes that are d irectly sensitive to the gluon distribution at leading order. A measureme nt of the forward direct photon $R_{dA}$ will cleanly access and greatly e xpand our understanding of the gluon nuclear parton distribution functions and provide important information about the initial state in heavy ion co llisions.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=346&se ssionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=346&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The RHIC Beam Energy Scan Program: Results from the PHENIX Experim ent DTSTART;VALUE=DATE-TIME:20120817T203000Z DTEND;VALUE=DATE-TIME:20120817T205000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-347@cern.ch DESCRIPTION:Speakers: MITCHELL\, Jeffery (Brookhaven National Laboratory)\ nMany recent lattice QCD calculations predict that there may be a first or der phase transition from hadronic matter to a Quark-Gluon Plasma that end s in a critical point\, with a continuous phase transition on the other si de of the critical point. The Relativistic Heavy Ion Collider (RHIC) has c onducted a program to probe different regions of the QCD phase diagram in the vicinity of the possible critical point with a beam energy scan. Durin g 2010 and 2011\, \nRHIC provided Au+Au collisions to PHENIX at $\\sqrt(s_ NN)=$ 200 GeV\, \n62.4 GeV\, 39 GeV\, 27 GeV\, 19.6 GeV\, and 7.7 GeV. An alysis of the data concentrates on two strategies: looking for signs of th e onset of deconfinement by comparing to results at the top RHIC energy\, and searching for direct signatures of a critical point.\n\nResults presen ted will include the following: charged particle multiplicity at mid-rapid ity\, transverse energy production at mid-rapidity\, energy loss via the $ R_{AA}$ and $R_{CP}$ observables from a variety of identified particles in cluding neutral pions and the $J/\\psi$\, collective flow measurements ($v _{2}$\, $v_{3}$\, $v_{4}$) from various particles including neutral pions\ , charged hadrons\, and identified particles in order to examine the valid ity of the number of constituent quark scaling at lower energies\, higher moments of the net charge distribution\, and fluctuations of the charged p article multiplicity.\n\nhttp://indico.cern.ch/contributionDisplay.py?cont ribId=347&sessionId=57&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=347&sessionId=5 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Cold nuclear matter effects on $\\Upsilon(1S+2S+3S)$ production DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-340@cern.ch DESCRIPTION:Speakers: LEE\, Kwangbok (Losalamos National Laboratory)\n$\\U psilon(1S+2S+3S)$ are measured in $d$ + Au and $p$ + $p$ collisions \nat $ \\sqrt{s_{NN}} $= 200 GeV by the PHENIX experiment in the di-muon decay ch annel \nat 1.2 \n\nhttp://indico.cern.ch/contributionDisplay.py?contribId= 340&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=340&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Thermal Photons in Heavy Ion Collisions at RHIC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-341@cern.ch DESCRIPTION:Speakers: PETTI\, Richard (S)\nThe hot and dense fireball prod uced in high energy heavy ion collisions\, such as that at RHIC\, exhibits complicated dynamics and time evolution. Thermal photons have a negligib le cross-section with the medium and so pass through unmodified\, thus mea suring their properties gives access to the entire time evolution of the f ireball. Thermal photons are expected to be observable at low momentum. T hey compete in yield with photons from hadron decays and\, at high momentu m (above roughly 4 GeV)\, direct photons that result from initial hard sca tterings of partons in the colliding nuclei. PHENIX has measured the yiel d of direct photons in Au+Au collisions\, as well as the baseline measurem ents in p+p and d+Au. Recently PHENIX has also measured elliptic flow of direct photons. The latest results on low momentum direct photons will be discussed\, including measurements of real photons using photon conversio ns and a novel method to reduce systematic uncertainties.\n\nhttp://indico .cern.ch/contributionDisplay.py?contribId=341&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=341&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Multiplicity and pseudo-rapidity distributions of photons at forwa rd rapidity in STAR at RHIC energies DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-342@cern.ch DESCRIPTION:Speakers: Ms. SOLANKI\, Dronika (University of rajasthan)\nThe main goal of the STAR experiment at Relativistic Heavy Ion Collider (RHIC ) is to study the properties of the QCD matter at extremely high energy de nsity and parton density\, created in the heavy ion collisions. Photons ar e produced at all stages of the colliding system and through decay of prod uced particles like neutral pions. The multiplicity measurement of photons on an event-by-event basis is an important measurement complementing the charged particle measurement in a heavy ion collision. Inclusive photon pr oduction at forward rapidity shows an energy-independent longitudinal scal ing as observed at √sNN = 62.4 and 200 GeV [1\,2]. Photons measurements at lower energies will be helpful in further testing the energy dependence of the longitudinal scaling. \n The Photon Multiplicity Detecto r in the STAR experiment measures inclusive photons in the pseudo-rapidity region −3.7 \n\nhttp://indico.cern.ch/contributionDisplay.py?contribId= 342&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=342&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Cold Nuclear Matter Effects in 200 GeV d+Au Collisions at PHENIX DTSTART;VALUE=DATE-TIME:20120815T133000Z DTEND;VALUE=DATE-TIME:20120815T135000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-343@cern.ch DESCRIPTION:Speakers: SAHLMUELLER\, Baldo ()\nWhile the study of the quark -gluon plasma has been the primary focus of the RHIC experiments\, much wo rk has also been done to understand so-called cold nuclear matter (CNM) ef fects through $d$+Au collisions where no hot plasma is produced. Effects such as nuclear shadowing\, Cronin enhancement\, and initial-state parton energy loss\, among others\, are not only interesting in their own right\, but have direct implications on QGP-related measurements in $A+A$ collisi ons.\n\nRecently PHENIX has measured CNM effects at midrapidity in $\\sqrt {s_{NN}}$ = 200 GeV $d$+Au collisions. Measurements of reconstructed jets reveal the centrality dependence of both jet suppression and broadening o f the away-side jet. Meanwhile\, single electrons from heavy flavor decay s exhibit enhancement over a broad $p_T$ range and increasing with central ity. These results will be presented and compared to our present understa nding of CNM effects to see if simultaneous constraints on nuclear shadowi ng\, initial state energy loss\, and Cronin effects can be found. The cen trality dependence of the nuclear modification\, for which there is no a p riori model\, will be examined in the context of available theoretical mod els of CNM effects\, including the EPS09 nuclear-modified parton distribut ion functions.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=3 43&sessionId=12&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=343&sessionId=1 2&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:A Running Coupling Explanation of the Surprisingly Transparency of the QGP at LHC DTSTART;VALUE=DATE-TIME:20120816T194000Z DTEND;VALUE=DATE-TIME:20120816T200000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-348@cern.ch DESCRIPTION:Speakers: BUZZATTI\, Alessandro (Columbia University)\nThe CUJ ET1.0 Monte Carlo Jet Energy loss model is applied to predict the jet flav or\, centrality and density dependence of the nuclear modification factor $R_{AA}$ and the elliptic flow $v_2$ at RHIC and LHC. Running coupling eff ects due to combined $x$\, $k_\\perp$ and $q_\\perp$ evolution are include d for the first time in the dynamical DGLV opacity expansion framework and are shown to provide a natural dynamical QCD tomographic solution to the surprising transparency$^1$ of the quark gluon plasma produced at LHC as s uggested by $p_T>10$ GeV $R_{AA}$ data from ALICE\, ATLAS\, and CMS.\n(Ref : 1: W.H.Horowitz et al\, NPA872(2011)265\, A.Buzzatti et al\, PRL108(2012 )022301\, B.Betz et al arXiv:1201.0281 [nucl-th])\n\nhttp://indico.cern.ch /contributionDisplay.py?contribId=348&sessionId=17&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=348&sessionId=1 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Momentum dependences of charmonium properties from lattice QCD DTSTART;VALUE=DATE-TIME:20120814T210500Z DTEND;VALUE=DATE-TIME:20120814T212500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-349@cern.ch DESCRIPTION:Speakers: DING\, Heng-Tong (Brookhaven National Lab)\nWe study the momentum dependence of charmonia in a hot medium using lattice QCD ca lculations. We analyze correlation functions and extract spectral function s from quenched calculations on large lattices close to the continuum limi t in the temperature region $1.5\n\nhttp://indico.cern.ch/contributionDisp lay.py?contribId=349&sessionId=50&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=349&sessionId=5 0&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The Tungsten-Scintillating Fiber Accordion Electromagnetic Calorim eter for the sPHENIX Detector DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-298@cern.ch DESCRIPTION:Speakers: Dr. WOODY\, Craig (Brookhaven National Lab)\nThe PHE NIX Experiment is planning a major upgrade to enhance its capabilities to measure jets in heavy ion collisions\, as well as in p+A\, polarized proto n\, and eventually e-A collisions at the Electron Ion Collider. One of the major new components of this upgrade will be a new compact electromagneti c calorimeter covering ±1 units in pseudorapidity and 2 in phi. It wil l consist of a matrix of tungsten plates\, tungsten powder\, scintillating fibers and epoxy formed into an accordion structure that will have a smal l Moliere radius and short radiation length\, thus allowing the calorimete r to have a high degree of segmentation for measuring jets at a relatively small radius and providing a compact design for the sPHENIX detector. The scintillating fibers will be read out using silicon photomultipliers that will be required to operate in the fringe field of the sPHENIX solenoid m agnet and will include a new electronic readout system. The overall design of the calorimeter will be described\, along with the R&D effort currentl y under way to develop the detector and its expected performance based on Monte Carlo simulations.\n\nhttp://indico.cern.ch/contributionDisplay.py?c ontribId=298&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=298&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Obtaining full vn distributions at the LHC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-299@cern.ch DESCRIPTION:Speakers: TIMMINS\, Anthony Robert (University of Houston (US) )\nThe large multiplicities at the LHC potentially permit azimuthal flow t o be accurately determined on an event by event basis in heavy-ion collisi ons. I will discuss methods one can obtain full vn distributions from such measurements. In particular\, any measurement of event-wise flow will be subject to statistical smearing\, and I will review unfolding techniques to recover the true vn distribution. The methods will be applied to variou s initial state models\, such as Monte Carlo Glauber. I will also discuss the effect of non flow and data driven techniques to remove it. Such poten tial measurements will shed light on the full nature of vn fluctuations\, and provide key constraints to the theories of initial conditions.\n\nhttp ://indico.cern.ch/contributionDisplay.py?contribId=299&sessionId=37&confId =181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=299&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Harmonious Harmonics? After the common origin of correlations and flow. DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-296@cern.ch DESCRIPTION:Speakers: MOSCHELLI\, George (Frankfurt Institute for Advanced Studies)\nWe show that initial state fluctuations in concert with later-s tage hydrodynamic flow describes a range of observables including both eve n and odd flow harmonics\, the ridge\, and multiplicity\, momentum and flo w fluctuations [1]. This is the first comparison between multiplicity and transverse momentum fluctuations and flow fluctuations in the same framewo rk. The simultaneous investigation of these observables allows us to study the interplay of correlations induced by collision geometry and common po ints of production. We employ a framework of initial state Glasma flux tub es followed by later stage hydrodynamic flow modeled in a blast wave. Our approach has the advantage that we can test our calculations over a broad range of collision systems and energies and provide useful benchmarks for more rigorous event-by-event hydrodynamic simulations. Our survey over the se observables reveals a common energy and centrality dependence that we a ttribute to the production mechanism. Glasma calculations are consistent w ith this dependence [2\,3].\n[1] S. Gavin and G. Moschelli\, in preperatio n\n[2] S. Gavin\, L. McLerran\, and G. Moschelli\, Phys. Rev. C79\, 051902 (2009)\, arXiv:0806.4718 [nucl-th]\n[3] S. Gavin and G. Moschelli\, Phys. Rev. C85\, 014905 (2012)\, arXiv:1107.3317 [nucl-th]\n\nhttp://indico.cern .ch/contributionDisplay.py?contribId=296&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=296&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Observation of identical "near-side" jet-like correlations in d+Au and Au+Au collisions at low trigger $p_T$ by STAR DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-294@cern.ch DESCRIPTION:Speakers: KONZER\, Joshua ()\nParticle production mechanisms v ary with $p_T$. At low $p_T$ soft processes dominate whereas hard process es dominate at higher $p_T$. Experimental data has shown drastic change f rom d+Au to Au+Au collision in $p_T$ spectra\, collective phenomena\, and baryon/meson ratio at intermediate $p_T$. This indicates that the relativ e mixture of particles produced by hard and soft processes differ between Au+Au and d+Au at a given\, relatively low $p_T$ (\n\nhttp://indico.cern.c h/contributionDisplay.py?contribId=294&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=294&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Time evolution of the sQGP from new solutions of relativistic hydr odynamics DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-295@cern.ch DESCRIPTION:Speakers: CSANAD\, Mate ()\nThe time evolution of the strongly interacting quark gluon plasma (sQGP) created in relativistic heavy ion c ollisions can be described by hydrodynamical models. Hadrons are created a t the freeze-out of this fluid\, thus their distributions reveal informati on about the final state. To access the time evolution and the initial sta te\, one needs either additional information about the Equation of State ( EoS) of this matter\, or one needs to analyze penetrating probes\, such as direct photon observables. [1] In this talk we review recent hydrodynamic solutions\, and show new exact\, analytic solutions of hydrodynamics with arbitrary temperature dependent EoS. We investigate special cases of this class of solutions\, in particular\, we present exact hydrodynamical solu tions with the Equation of State determined from lattice QCD calculations. [2] We calculate direct photon spectra\, elliptic flow and HBT radii and compare them to recent direct photon measurements performed by the PHENIX experiment at RHIC [3]. The first family of rotating solutions of relativi stic and non-relativistic hydrodynamics are also shown [4]. The effect of the total angular momentum of the system on the elliptic flow and HBT radi i is also reviewed. It is an important result that elliptic flow may be ge nerated by the rotation of the system.\n\nReferences:\n[1]\n"Similar final states from different initial states using new exact solutions of relativ istic hydrodynamics."\nM. Csanad\, M. Nagy\, T. Csorgo\, Eur.Phys.J.ST 155 (2008) 19\nand\n"Initial conditions\, equations of state and final state in hydrodynamics."\nM. Csanad\, Acta Phys.Polon. B40 (2009) 1193\n\n[2]\n" Exact solutions of relativistic perfect fluid hydrodynamics for QCD equati on of state"\nM. Csanad and M. Nagy\, in preparation\n\n[3]\n"Equation of state and initial temperature of quark gluon plasma at RHIC"\nM. Csanad an d I. Majer\, Centr. Eur. J. Phys.\, arXiv:1101.1279\n\n[4]\n"New simple ex plicit solutions of perfect fluid hydrodynamics and phase-space evolution" \nM. Nagy\, Phys.Rev. C83 (2011) 054901\n\nhttp://indico.cern.ch/contribut ionDisplay.py?contribId=295&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=295&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Two particle correlation measurements with respect to higher harmo nic event planes at PHENIX DTSTART;VALUE=DATE-TIME:20120817T190000Z DTEND;VALUE=DATE-TIME:20120817T192000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-292@cern.ch DESCRIPTION:Speakers: TODOROKI\, Takahito for the PHENIX Collaboration (Un iversity of Tsukuba\, RIKEN Nishina Center)\nTwo particle correlations pro vide key information on the interactions\nbetween hard-scattered partons a nd the hot dense medium created\nby ultra-relativistic heavy ion collision s.\nAn important aspect of extracting jet functions from correlation\nmeas urements in heavy ion collisions is to estimate the underlying\nevent back ground level and its modulation by vn. This is essential for\nthe goal of discerning possible medium response to hard-scattered\npartons. At both RH IC and the LHC\, higher harmonic flow(vn) has\nrecently been measured over a large rapidity range. Harmonics\nbeyond v2 provide sensitivity to fluct uations of the initial collision\ngeometry. After subtracting vn component of the background\, we\nare able to construct correlations in which the t rigger particle is\nselected with respect to not only the second\, but als o higher\,\nharmonic event planes. These provide detailed knowledge of the path\nlength dependence of parton energy loss and its sensitivity to each \nharmonic event plane. This talk will present the current results of azim uthal\nhadron correlations both with and without trigger selection relativ e to\nhigher harmonic event planes in Au+Au 200 GeV collisions.\n\nhttp:// indico.cern.ch/contributionDisplay.py?contribId=292&sessionId=26&confId=18 1055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=292&sessionId=2 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Antiparticle to particle ratios and identified hadron spectra for p+p collisions in sqrt(s)=62.4 GeV at STAR DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-293@cern.ch DESCRIPTION:Speakers: GUPTA\, Shikshit (University of Jammu)\nInformation about the evolution of the system formed during the high energy p + p coll isions can be obtained by investigating the charged particle ratios. The p article ratios serve as an important indicator of the collision dynamics [ 1]. These can be used to probe the process of hadronization in high energy collisions. In this poster\, we will present measurements of mid-rapidity antiparticle to particle ratios in p + p collisions at sqrt(s)= 62.4 GeV from the STAR experiment. The charged pion and kaon particle ratios as wel l as the antiproton to proton ratios will be measured as a function of tra nsverse momentum using the TPC detector. Charged hadrons will be identifi ed by using specific ionization energy loss at the low momentum region (0 .15 to 0.75 GeV) [2-3]. We will compare our results with the previous meas urements made with same collision system at ISR energies [4]. Antiproton t o proton ratio will be obtained after applying background corrections to t he proton yields.\n\nReferences\n\n[1] H. Satz \, Rep.Prog.Phys. 63 (2000) 151.\n[2] B. I. Abelev et al.\, [STAR Collaboration]\, Phys.Rev.C 79 (200 9) 34909.\n[3] H. Bichsel\, Nucl.Instrum.Meth.A vol. 562\, (2006) 154-197. \n[4] B. Alper et al.\, Nucl.Phys.B 100 (1975) 237-290.\n\nhttp://indico.c ern.ch/contributionDisplay.py?contribId=293&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=293&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Detailed HBT measurement with respect to event plane and collision energy in Au+Au collisions at PHENIX DTSTART;VALUE=DATE-TIME:20120814T181500Z DTEND;VALUE=DATE-TIME:20120814T183500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-291@cern.ch DESCRIPTION:Speakers: NIIDA\, Takafumi (University of Tsukuba (JP))\nThe H BT measurement provides the information on the space-time evolution of par ticle emitting source in relativistic heavy ion collisions. Azimuthal comp onent of 3D HBT radii relative to event plane gives us the information of the source shape at freeze-out. It also provides the information of the sy stem evolution by comparing with the initial source shape.\nThe recent mea surement of higher harmonic flow ($v_{3}$\, $v_{4}$\, etc) are measured at RHIC and LHC\, which are primarily coming from the spatial fluctuation of the initial density on the collision area. Hydrodynamic model calculation reports that the shape by the initial fluctuation resulting in triangular component may be preserved until freeze-out. The HBT measurement relative to higher order event plane may show the feature if this is the case. \nW e will present the recent results of azimuthal HBT measurement relative to 2^{nd} and 3^{rd} order event plane in Au+Au 200 GeV collisions at PHENIX . Eccentricity at freeze-out for charged pions and kaons will be compared and discussed. Also\, triangularity at freeze-out for charged pions will b e reported. The recent HBT measurement at lower energies will also be show n\, and compared with 200GeV results.\n\nhttp://indico.cern.ch/contributio nDisplay.py?contribId=291&sessionId=4&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=291&sessionId=4 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Simulation of hadronic cocktail decay contributions to the dielect ron spectrum within the PHENIX acceptance DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-591@cern.ch DESCRIPTION:Speakers: SUN\, Jiayin (Stony Brook University)\nDielectron sp ectra in Au+Au collisions carry important information on the properties of the hot dense matter created in the early stage of the collisions. The ea rlier PHENIX measurement\, using data taken in 2004 shows significant devi ations from hadronic decay expectations. The most recent data set from 201 0\, taken with the the Hadron Blind Detector (HBD) upgrade designed to red uce the combinatorial background\, promises to be a more significant resul t. This new data set requires an update to the simulations of hadronic coc ktail contributions. The cocktail provides the benchmark for studying medi um effects\, such as the previously reported low mass excess. The new simu lation takes into account improved PHENIX measurements of the cross sectio ns for some of the hadrons (\\eta\, \\phi\, \\omega)\, as well as an impro ved line shape of the \\rho meson. In addition\, it also includes the modi fied PHENIX acceptance and additional detector material. Results on the ne w cocktail and comparison with dielectron spectra will be shown.\n\nhttp:/ /indico.cern.ch/contributionDisplay.py?contribId=591&sessionId=37&confId=1 81055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=591&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Color decoherence of jets in Heavy Ion Collisions DTSTART;VALUE=DATE-TIME:20120816T192000Z DTEND;VALUE=DATE-TIME:20120816T194000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-590@cern.ch DESCRIPTION:Speakers: Dr. MEHTAR-TANI\, Yacine (IPhT-Saclay)\nThe recent j et measurements at RHIC and the LHC have challenged the heavy-ion communit y to a better understanding of jet fragmentation in the presence of the Qu ark-Gluon-Plasma (QGP). \n\nJet fragmentation in vacuum is well described by perturbative QCD and is characterized by color coherence effects that l ead to the angular ordering of successive branchings along the jet. To inv estigate the alteration of color coherence in jets in the QGP we study the radiation pattern of a color-correlated quark-anti-quark antenna which is in fact the building block of jet evolution in vacuum. \n\nWe show that in a dense medium the onset of coherence is governed by the hardest scale induced by the presence of the medium. In a medium of length $L$ and tran sport coefficient $\\hat q$ this can either be the typical transverse mome ntum broadening  of the gluon in the medium\, $\\sqrt{\\hat q L}$\, or th e inverse of the size of the antenna as probed by the medium\, namely  $ r_\\perp^{-1}=(\\theta_{qq} L)^{-1}$\, where $\\theta_{qq}$ is the openin g angle of the antenna. Therefore\, for $k_\\perp\n\nhttp://indico.cern.c h/contributionDisplay.py?contribId=590&sessionId=18&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=590&sessionId=1 8&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Can baryon stopping explain the breakdown of constituent quark sca ling and proposed signals of chiral magnetic waves at RHIC? DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-593@cern.ch DESCRIPTION:Speakers: CAMPBELL\, John (T)\nAzimuthal emission spectra of v arious hadron species in ultra-relativistic heavy ion collisions at $\\sqr t{s_{NN}} \\approx $ 200 GeV exhibit a curious hierarchy at intermediate $ p_t$ ($\\approx 2-3$ GeV). Rather than being ordered by mass\, the spectra seem to be ordered by whether the species is a baryon or meson. It is see n that when the elliptic flow $v_2$ and transverse momentum $p_T$ are both scaled by the number of quarks in each hadron\, the spectra fall in line with each other [1]. This number of constituent quark (NCQ) scaling sugges ts a system where the relevant degrees of freedom are colored partons as o pposed to hadrons: the quark-gluon plasma (QGP). Thus\, a break down of th is scaling as beam energy is reduced could be indicative of the QGP thresh old. However\, at lower energies\, there is also an increase in the number of entrance-channel partons transported to mid-rapidity due to baryon sto pping\, which can also violate NCQ scaling\, even above the QGP threshold [2]. We describe a specific pattern for the break down of the scaling that includes the observed difference in elliptic flow for positive and negati ve pions. \\\\\nWe also contrast baryon stopping with the Chiral Magnetic Effect (CME) [3]--an alternative model for $\\pi_{+} / \\pi_{-}$ flow diff erence--and discuss results from tests that can distinguish between them.\ n\n[1] Rainer J. Fries\, Vincenzo Greco\, and Paul Sorensen\, Coalescence Models For\nHadron Formation From Quark Gluon Plasma\, Ann.Rev.Nucl.Part.S ci. 58\n(2008)\, 177–205.\n\n[2] J.C. Dunlop\, M.A. Lisa\, and P. Sorens en\, Constituent quark scaling violation\ndue to baryon number transport\, Phys.Rev. C84 (2011)\, 044914.\n\n[3] Yannis Burnier\, Dmitri E. Kharzeev \, Jinfeng Liao\, and Ho-Ung Yee\, Chiral\nmagnetic wave at finite baryon density and the electric quadrupole moment\nof quark-gluon plasma in heavy ion collisions\, Phys.Rev.Lett. 107 (2011)\,\n052303.\n\nhttp://indico.ce rn.ch/contributionDisplay.py?contribId=593&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=593&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Speed of sound and dynamics of relativistic heavy ion collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-592@cern.ch DESCRIPTION:Speakers: Prof. GHOSH\, Sanjay (Bose Institute)\nCollective fl ow is an essential component in describing the\ndynamics of relativistic h eavy ion collisions. The flow characteristics are intimately related to th e equation of state of the thermally equilibrated matter created in these collisions through the speed of sound. Using either the Bjorken or Landau hydrodynamics or a combination thereof it is possible to relate the\nparti cle yields to the speed of sound. Here we study the flow properties using the equation of state from an effective model and discuss the possible dis tinctive signatures at low densities and high temperature relevant for LHC and at high densities and low temperatures relevant for FAIR. The differe nce in characteristics of these two scenarios may help us in identifying t he region around the\ncritical end point.\n\nhttp://indico.cern.ch/contrib utionDisplay.py?contribId=592&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=592&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Using CMBR tools to study flow anisotropies in relativistic heavy ion collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-594@cern.ch DESCRIPTION:Speakers: Ms. SAUMIA\, P S (Institute of Physics)\nWe study th e interesting similarities between the physics of cosmic microwave backgro und radiation\nanisotropies and the flow anisotropies in relativistic heav y ion collision experiments. Further we\nexplore how the techniques in CMB R analysis could be utilized in studying the flow anisotropies in\nRHICE. \n\n We argue that the initial state fluctuations of the matter formed in heavy ion collisions have\nsimilar properties as the fluctuations in the early universe generated by the inflaton field\, and by \nstudying the flo w coeffecients ( a plot of v_n vs. n) we can obtain valuable information a bout the \nnature and evolution of these fluctuations. We also study the effect of magnetic field on flow. \nIn the presence of magnetic field plas ma develops three acoustic modes. It is known in literature that\nthis dis torts the CMB acoustic peaks. We show that flow coefficients in relativist ic heavy ion collisions \ncan be significantly affected by these effects w here a a strong magnetic field is known to be \npresent in the initial sta ges (of non-central collisions) and is expected to survive due to strong \ ninduced fields in the conducting plasma. This raises the possibility whet her a larger value of $\\eta/s$ \ncan be accommodated by RHIC data. We als o show that flow anisotropies in relativistic heavy-ion collisions\n can b e analyzed using a certain technique of shape analysis of excursion sets r ecently proposed by us for \nCMBR fluctuations to investigate anisotropic expansion history of the universe. The technique analyzes shapes \n(sizes) of patches above (below) certain threshold value for transverse energy/pa rticle number fluctuations \n(the excursion sets) as a function of the azi muthal angle and rapidity. This provides an alternative way to \nidentify the event plane in an event.\n\nhttp://indico.cern.ch/contributionDisplay. py?contribId=594&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=594&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Performance simulations of a super compact forward electromagnetic calorimeter DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-597@cern.ch DESCRIPTION:Speakers: SKODA\, Libor (Czech Technical University (CZ))\nWe present a performance study of a compact electromagnetic calorimeter meant to serve in a forward region (2 \n\nhttp://indico.cern.ch/contributionDis play.py?contribId=597&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=597&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Baryon number probability distribution in the presence of the chir al phase transition DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-195@cern.ch DESCRIPTION:Speakers: Dr. MORITA\, Kenji (Kyoto University)\nWe discuss th e influence of the chiral phase transition on the properties\nof the proba bility distribution of conserved charges based on effective chiral\nmodels and on the Landau theory of phase transition [1].\n\nStatistical fluctuat ions of the net baryon number have been regarded as a\ndiagnostic tool of the chiral phase transition in QCD and in heavy ion collisions.\nNormally\ , they are discussed by calculating cumulants of the net baryon\nnumber in the grand canonical ensemble. Lattice QCD and effective model calculation s\nhave revealed their critical behaviors in the vicinity of the chiral ph ase\ntransition.\n\nThe purpose of this work is to characterize the critic al behavior in terms\nof the baryon number probability distribution which is a measurable observable \nin heavy ion collisions.\n\nWe show the influ ence of the chiral crossover transition on the net baryon\nnumber probabil ity distribution within the Polyakov loop extended quark-meson model\, \ni n a non-perturbative approach\, based on the functional renormalization gr oup method [1].\n\nWe construct an analytically solvable model which respe cts relevant\nsymmetries\, based on the Landau theory\, and discuss proper ties of the\nbaryon number probability distribution in the presence of the phase transition.\nWe emphasize the relationship of the probability distr ibution to the analytic\nstructure of the grand canonical partition functi on in a complex chemical\npotential [2-4].\nWe show\, through both numeric al and analytic considerations\,\nthat the singular structure\, which give s the divergent cumulants\,\nleads to an interesting anomalous oscillatory behavior in the probability\ndistribution.\n\nOur theoretical studies are relevant in heavy ion phenomenology to\npossibly identify the QCD phase t ransition and its order\nby measuring probability distributions of conserv ed charges.\n\n\n[1] K. Morita\, V. Skokov\, B. Friman and K. Redlich\, to appear.\n[2] V. Skokov\, K. Morita\, B. Friman\, Phys. Rev. D83\, (2011) 071502(R).\n[3] K. Morita\, V. Skokov\, B. Friman and K. Redlich\,\n ``Pro bing deconfinement in the Polyakov-loop extended\nNambu-Jona-Lasinio model at imaginary chemical potential\,''\n arXiv:1111.3446 [hep-ph].\n[4] K. Morita\, V. Skokov\, B. Friman and K. Redlich\, Phys. Rev. D84 (2011) 074 020.\n[5] K. Morita\, V. Skokov\, B. Friman and K. Redlich\, Phys. Rev. D84 (2011) 076009.\n\nhttp://indico.cern.ch/contributionDisplay.py?contrib Id=195&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=195&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Heavy quark energy loss in p+p collisions at the LHC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-194@cern.ch DESCRIPTION:Speakers: Dr. VOGEL\, Sascha (Frankfurt Institute for Advances Studies)\nOne of the most promising probes to study deconfined matter cre ated in high energy nuclear collisions is the energy loss of (heavy) quark s. It has been shown in experiments at the Relativistic Heavy Ion Collider that even charm and bottom quarks\, despite their high mass\, experience a remarkable medium suppression in the Quark Gluon Plasma. \n\nIn this in vestigation we study the energy loss for heavy quarks in high multiplicity proton proton collisions at LHC energies. Although the colliding systems are smaller than compared to those at RHIC (p+p vs. Au+Au) the higher ener gy might lead to multiplicities comparable to Cu+Cu collisions at RHIC and thus might lead to a deconfined phase. This gives rise to a non-negligibl e suppression of heavy quark yields in elementary collisions. We study the dependence of this phenomenon on various quantities\, such as the deconfi nement energy density and the multiplicity reached in proton proton collis ions and discuss this measurement as a probe to pin down parameters of the deconfinement phase transition.\nThis study is published in Phys.Rev.Lett . 107 (2011) 032302. (arXiv:1012.0764)\n\nhttp://indico.cern.ch/contributi onDisplay.py?contribId=194&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=194&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Influence of the medium evolution on heavy quark observables DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-196@cern.ch DESCRIPTION:Speakers: Dr. VOGEL\, Sascha (Frankfurt Institute for Advanced Studies)\nOne of the most promising probes to study deconfined matter cre ated in high energy nuclear collisions is the energy loss of (heavy) quark s. Theoretically however there exist various ambiguities\, which still nee d to be resolved. In this work we investigate the dependence on the medium description of heavy quark energy loss. We find that by only changing the theoretical medium description and keeping the energy loss mechanisms int act one can expect huge discrepancies (up to a factor of 2!) in the very s ame theoretical approach. The medium descriptions we compare are widely us ed in the field of heavy ion physics\, ranging from elliptic fireball mode ls to hydrodynamics.\n\nThus\, by pinning down the energy loss mechanism w ith other existing approaches and measurements one can use this effect in order to differentiate between various medium descriptions and limit the p arameter range of QGP modeling.\n\nhttp://indico.cern.ch/contributionDispl ay.py?contribId=196&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=196&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:(Anti) matter and hyper-matter production at the LHC with the ALIC E experiment DTSTART;VALUE=DATE-TIME:20120816T192000Z DTEND;VALUE=DATE-TIME:20120816T194000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-191@cern.ch DESCRIPTION:Speakers: DOENIGUS\, Benjamin (GSI - Helmholtzzentrum fur Schw erionenforschung GmbH (DE))\nThe excellent particle identification capabil ities of the ALICE experiment allow the studies of (anti) matter and hyper -matter production. (Anti) deuterons\, tritons\, 3He and 4He as well as th e corresponding antinuclei can be cleanly identified based on their specif ic energy loss in the Time Projection Chamber and velocity information in the Time-Of-Flight detector. The (anti) hyper-triton signal can be extract ed from the study of its mesonic decay (3_lambda_H -> 3He + pion) via the topological identification of secondary vertices.\nThe (3He\, pion) invari ant mass spectrum will be shown\, and the measurement of production yield will be provided. Transverse momentum (pt) spectra of (anti) nuclei along with their production yield and mean pt will be presented.\nIn addition to this\, searches for even lighter hyper-matter systems\, i.e. lambda-lambd a and lambda-n bound states will be discussed. The results will also be co mpared with the expectations from the thermal and coalescence models.\n\nh ttp://indico.cern.ch/contributionDisplay.py?contribId=191&sessionId=15&con fId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=191&sessionId=1 5&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Heavy-quark diffusion at the LHC within a UrQMD-hydrodynamical hyb rid model DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-193@cern.ch DESCRIPTION:Speakers: Dr. VAN HEES\, Hendrik (Goethe University Frankfurt) \nHeavy charm and bottom quarks provide an important probe of the\ntranspo rt properties of the quark-gluon plasma\, created in heavy-ion\ncollisions at the Large Hadron Collider (LHC). They are produced in the\nearly hard collisions and then interact with the hot and dense medium\,\nconsisting o f light quarks and gluons\, undergoing a phase transition to\na hot and de nse hadron gas. Using a hybrid model of Ultrarelativistic\nMolecular Dynam ics (UrQMD) and 3D hydrodynamics [1] to simulate the\nevolution of the hot and dense medium\, we describe heavy-quark\ninteractions with the medium in terms of a Fokker-Planck/Langevin\nframework with drag and diffusion co efficients based on a\nDirac-Brueckner evaluation of the in-medium scatter ing-matrix elements\nusing lattice QCD heavy-quark potentials for elastic light-heavy-quark\nscattering [2] or a phenomenological resonance-scatteri ng model based on\nchiral and heavy-quark effective theory [3] to evaluate the nuclear\nmodification factor\, R_AA\, and elliptic flow v_2 of D- and B-mesons in\nPbPb collisions at sqrt(s_NN)=2.76 TeV. The results are comp ared with\nrecent data from the ALICE collaboration on R_AA and elliptic f low of\nsingle electrons\, muond\, and D-mesons.\n\n[1] H. Petersen\, J. S teinheimer\, G. Burau\, M. Bleicher\, H. Stöcker\,\nPhys. Rev. C 78\, 044 901 (2008)\n\n[2] H. van Hees\, M. Mannarelli\, V. Greco\, R. Rapp\, Phys. Rev. Lett. 100\n(2008)\, 192301.\n\n[3] H. van Hees\, V. Greco\, R. Rapp\ , Phys. Rev. C 73 (2006)\, 034913.\n\nhttp://indico.cern.ch/contributionDi splay.py?contribId=193&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=193&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Energy dependence of fluctuations in p+p collisions at the CERN SP S DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-192@cern.ch DESCRIPTION:Speakers: MACKOWIAK-PAWLOWSKA\, Maja Katarzyna (Johann-Wolfgan g-Goethe Univ. (DE))\nNA61/SHINE at the CERN SPS is a fixed-target experim ent pursuing a\nrich physics program including measurements for heavy ion\ , neutrino and\ncosmic ray physics.\nThe main goal of the ion program is t o explore the most interesting region of the phase diagram of strongly int eracting matter. Within the expected (T - mu_B) interval we plan to study the properties of the onset of deconfinement and to search for the signatu res of the critical point. Such 2D scan will be performed by varying colli sion energy (13A-158A GeV) and system size (p+p\, Be+Be\, Ar+Ca\, Xe+La).\ nThanks to its large acceptance and good particle identification NA61/SHIN E is well suited for study of event-by-event fluctuations.\nIn this contri bution preliminary results on energy dependence of\ntransverse momentum\, azimuthal angle and chemical composition fluctuations in p+p interactions will be shown.\nThe new data will be compared with the corresponding resul ts of NA49\non central Pb+Pb collisions.\n\nhttp://indico.cern.ch/contribu tionDisplay.py?contribId=192&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=192&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Deviation from quark number scaling of the anisotropy parameter v2 of pions\, kaons\, and protons in Au+Au collisions at 200 GeV DTSTART;VALUE=DATE-TIME:20120815T150000Z DTEND;VALUE=DATE-TIME:20120815T152000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-270@cern.ch DESCRIPTION:Speakers: Dr. HUANG\, shengli (PHENIX Collaboration)\nThe numb er of quark ($n_q$) scaling\, which is manifested\nas $v^{hadron}_{2}(p_T) \\approx n_q*v_2(p_T/n_q)$\, is an\napproximate scaling that comes from t he addition of the valence\nquark momenta at hadronization. The observatio n of $n_q$ scaling\nhas been claimed that a partonic matter with quark-lik e degrees\nof freedom and significant collectivity has been generated in\n heavy ion collisions~\\ref{1\,2}. However\, there are several\ntheoretical considerations that suggest that the $n_q$ scaling\nshould be violated in certain conditions. For example\, the\ncontribution of sea quarks and glu ons have been shown to affect\nthe $n_q$ scaling in the models including h igher Fock states. And\nmodels that consider recombination between "therma l" and "shower"\npartons predict centrality dependent deviations from $n_q $\nscaling.\n\n Understanding the limits of the recombination domain is important\nin relation to viscous hydrodynamics and the extraction of the\ nshear viscosity over entropy density ($\\eta/s$) from the data\, as\nwell as for developing a unified approach in describing jet energy\nloss and h igh $p_T$ $v_2$. Searches for deviations from $n_q$\nscaling are also impo rtant for the low-energy scan program at RHIC\nas they have been considere d as a signature of the transition\nbetween sQGP formation and a hadronic system. In this talk\, we\nwill report on high-statistics measurements of the second order\nFourier coefficient $v_2$ for identified pions\, kaons a nd protons\,\nwhich extend to relatively high $p_T$ around 6 GeV/c. Compar isons\nwith published measurements of $K^{0}_{S}$ and $\\Lambda$ are shown \nfor the different centralities. With these new measurements\, the\n$p_T$ limits and centrality dependence of the $n_q$ scaling\ndeviations are bei ng carried out in PHENIX.\n\n[1]V. Greco\, C. M. Ko\, and P. Levai\, Phys. Rev. Lett. 90\, 42\n202302 (2003). 43\n\n[2] D. Molnar and S. A. Voloshin \, Phys. Rev.Lett. 91\, 44 092301\n(2003).\n\nhttp://indico.cern.ch/contri butionDisplay.py?contribId=270&sessionId=51&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=270&sessionId=5 1&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:sPHENIX Jet Upgrade Program: Unraveling Strong versus Weak Coupli ng DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-271@cern.ch DESCRIPTION:Speakers: Prof. NAGLE\, Jamie (University of Colorado)\nThe PH ENIX Experiment is proposing an exciting suite of upgrades called sPHENIX\ , with a first stage including a world class jet\ndetector with full elect romagnetic and hadronic calorimetry capable of sampling up to 50 billion A u+Au collisions annually and measuring jets over a broad kinematic range a nd with high statistics (over 10 million jets above 20 GeV and over 100\,0 00 jets above 40 GeV). The motivation for extending the jet program of th e LHC to temperatures in the range of the transition temperature and varyi ng the scale for probing the medium relates directly to the question of ho w strong coupling works near the transition temperature and how rapid the approach to weak coupling might be. In this presentation\, we detail the various theoretical calculations and how a comprehensive world program (at both RHIC and the LHC) of jet and high energy hadron and photon measureme nts will be key to unravel this puzzle.\n\nhttp://indico.cern.ch/contribut ionDisplay.py?contribId=271&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=271&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Entropy production in classical Yang-Mills system from color-glass condensate initial condition with noise DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-272@cern.ch DESCRIPTION:Speakers: IIDA\, Hideaki (Kyoto University)\nPossible thermali zation mechanism in heavy-ion collisions is explored in classical\nYang-Mi lls(CYM) theory with the initial condition of color-glass condensate\nwith noise varied. We calculate the Lyapunov exponents and show that even a ti ny noise\ntriggers instability of the system and then a chaotic behavior s ets in as described\nby the positive Lyapunov exponents\, or Kolmogorov-Si nai(K-S) entropy\,\nwhich would take a saturate value after a characterist ic time dependent on the ratio\nof strengths of the noise to the back grou nd coherent fields.\nThus we see that the entropy production is achieved i n CYM theory with a realistic initial condition of relativistic heavy-ion collisions.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=272& sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=272&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Extruction of nontrivial correlation between chiral and deconfinem ent transitions from two-color QCD at imaginary chemical potential DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-274@cern.ch DESCRIPTION:Speakers: KASHIWA\, Kouji (RIKEN BNL Research Center)\nWe inve stigate the nontrivial correlation between the chiral and deconfinement tr ansition in the two-color QCD.\nTo extract the information\, the imaginar y chemical potential is taken into account.\nAt $\\theta = \\pi/2$ where $ \\theta$ is the imaginary chemical potential divided by the temperature\, there is the exact nontrivial center symmetry which is the $Z_2$ symmetry and this symmetry can be spontaneously broken.\nThis behavior is quite dif ferent form the three-color QCD because the nontrivial center symmetry is always broken by the quark degree of freedom\nin the three-color QCD.\nThi s means that we can investigate the nontrivial correlation between the chi ral and deconfinement transitions in the two-color system clearly than tha t in the three-color system.\nSuch nontrivial correlation is very importan t to construct the effective model of QCD and thus we can expect that seve ral important model constraints are obtained from the two-color QCD analys is.\nIn this study\, we mainly pay attention to the behavior of the Roberg e-Weiss (RW) endpoint which appears at $\\theta=\\pi/2$ in the tho-color s ystem.\nWe show that the RW endpoint is second-order if the nontrivial cor relation is weak\, but it turn into first-order when the nontrivial correl ation is sufficiently strong.\n\nhttp://indico.cern.ch/contributionDisplay .py?contribId=274&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=274&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Freeze-out conditions from lattice QCD DTSTART;VALUE=DATE-TIME:20120816T192000Z DTEND;VALUE=DATE-TIME:20120816T194000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-275@cern.ch DESCRIPTION:Speakers: MUKHERJEE\, Swagato (Brookhaven National Laboratory) \nTraditionally the freeze-out conditions in the heavy-ion collision exper iments are obtained by comparing the experimentally measured hadron yields with that from the statistical hadron resonance gas model. In this talk w e will present how the freeze-out chemical potentials and the freeze-out t emperature can be obtained in a model independent way from ab-initio latti ce QCD calculations by utilizing observables related to conserved charge f luctuations. We will show that the freeze-out strangeness and electric cha rge chemical potentials can be fixed by imposing strangeness neutrality a nd isospin asymmetry constraints in the lattice QCD calculations. Further\ , we will present how the freeze-out baryon chemical potential and the fre eze-out temperature can be determined by comparing lattice QCD results for various ratios of conserved charge susceptibilities with the correspondin g ratios of moments of conserve charge fluctuations that are currently bei ng measured by the STAR experiment. A comparison of the freeze-out paramet ers obtained from the lattice QCD calculations with that from the hadron r esonance gas model will also be presented.\n\nhttp://indico.cern.ch/contri butionDisplay.py?contribId=275&sessionId=16&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=275&sessionId=1 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Identification of charmed particles using multivariate analysis in STAR experiment DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-276@cern.ch DESCRIPTION:Speakers: VANFOSSEN\, Joseph (Kent State University)\, BOUCHET \, Jonathan (Kent State University)\nHeavy flavor particles\, due to their production at the early stages of a collision\, are of interest to study the properties of the matter created in heavy ion collisions at RHIC. Prev ious measurements of $D$ and $B$ mesons at RHIC[1\, 2] using semi-leptonic probes show a suppression similar to that of light quarks\, which is in c ontradiction with theoretical models including only a gluon radiative ener gy loss mechanism[3]. A direct topological reconstruction is needed to obt ain a precise measurement of hadronic charmed meson decays. The remaining combinatorial background can be reduced by using modern multivariate techn iques (TMVA)[4] that makes optimal use of all the information available. C omparison with classical methods and recent results[5] as well as the perf ormances of some classifiers will be presented for the reconstruction of $ D^{0}$ decay vertex ($D^{0} \\rightarrow K^{-}\\pi^{+}$) and its charge co njugate from Au+Au collisions at $\\sqrt{s_{NN}}$ = 200 GeV produced in 20 07 using the Silicon Vertex Tracker and Silicon Strip Detector.\n\\newline \n\\newline\n[1]Adare A. et al.\, PHENIX Collaboration\, Phys. Rev. C 84\, 044905\, 2011\\newline\n[2]B.I. Abelev et al.\, STAR Collaboration\, Phys . Rev. Lett 106\, 159902\, 2011\\newline\n[3Y. L. Dokshitzer\, D. E. Kharz eev\, Phys. Lett. B 519\, 2001\\newline\n[4]A. Hoecker et al.\, arXiv:phys ics/0703039v5\\newline\n[5]B. I. Abelev\, et al\, STAR Coll.\, arXiv:0805. 0364\\newline\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=27 6&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=276&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Probing the Initial State with Coherent Vector Meson Scattering in STAR Ultraperipheral Au-Au Collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-278@cern.ch DESCRIPTION:Speakers: Dr. MADAGODAHETTIGE DON\, Dilan (STAR (Creighton Uni versity))\nUltraperipheral collision events are effectively photoproductio n on nuclear targets. These events provide an ideal proving ground for new programs in e+A physics. For the first time\, STAR has collected a large enough sample of rho mesons to study their diffractive interaction with Au nuclear targets in detail. The transverse momentum distribution of rho me sons is sensitive not only to the distribution of nucleons in the target\, but the dominance of Pomeron exchange at RHIC energies makes this distrib ution sensitive to the gluon distribution in nuclei. We will describe our latest work on diffractive scattering of rho mesons on Au nuclei and its c omparison to several calculations based on different gluon exchange mechan isms. We will also present recent results of the measurement of J/ψ photo production in 200 (GeV) AuAu collisions at RHIC. The pT distribution of th e J/ψ mesons peaks at very low pT \, consistent with expectations for coh erent photoproduction.\nBoth the photoproduction cross section and the J/ ψ rapidity distribution are expected to show the effects of gluon shadowi ng. We will present a measurement of the ratio of J/ψ to rho meson cross sections in 200 GeV AuAu collisions\, as well as a distribution of J/ψ ra pidity within | y |\n\nhttp://indico.cern.ch/contributionDisplay.py?contri bId=278&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=278&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Electric and baryonic charge fluctuations from lattice QCD DTSTART;VALUE=DATE-TIME:20120816T184000Z DTEND;VALUE=DATE-TIME:20120816T190000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-279@cern.ch DESCRIPTION:Speakers: Dr. SCHMIDT\, Christian (Universitaet Bielefeld)\nWe calculate electric and baryonic charge fluctuations on the lattice. Resul ts have been obtained with the highly improved staggered quark action (HIS Q) and almost physical quark masses on lattices with temporal extent of N_ tau=6\,8\,12. Higher cumulants of the net-charge distributions are increas ingly dominated by a universal scaling behavior\, which is arising due to a critical point of QCD in the chiral limit. Considering cumulants up to t he 6th order\, we observe that they generically behave as expected from un iversal scaling laws\, which is quite different from cumulants calculated within the hadron resonance gas model. Taking ratios of these cumulants\, we obtain volume independent results that can be directly compared to the experimental measurements. Such a comparison will unambiguously relate the QCD transition temperature that has been determined on the lattice with\, the freeze out temperature of the heavy ion collision at LHC and the 200 GeV RHIC run.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=27 9&sessionId=16&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=279&sessionId=1 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Azimuthal angular correlations in two-particle production in proto n-nucleus collisions DTSTART;VALUE=DATE-TIME:20120815T131000Z DTEND;VALUE=DATE-TIME:20120815T133000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-525@cern.ch DESCRIPTION:Speakers: JALILIAN-MARIAN\, Jamal (Baruch College)\nDi-hadron azimuthal angular correlations in the forward rapidity region of deuteron- nucleus collisions at RHIC show a disappearance of the away side peak with centrality and transverse momentum. This can be understood\, in the Color Glass Condensate (CGC) formalism\, to be due to multi-gluon exchanges bet ween the projectile and target. We show that CGC formalism predicts a simi lar disappearance of the away side peak in the prompt photon-hadron azimut hal angular correlations. We make detailed predictions for transverse mom entum and centrality dependence of this disappearance in deuteron-gold col lisions at RHIC and proton-nucleus collisions at the LHC.\n\nhttp://indico .cern.ch/contributionDisplay.py?contribId=525&sessionId=12&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=525&sessionId=1 2&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Photon production in hot QCD plasmas at NLO and two-to-three proce sses DTSTART;VALUE=DATE-TIME:20120816T180000Z DTEND;VALUE=DATE-TIME:20120816T182000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-526@cern.ch DESCRIPTION:Speakers: TEANEY\, Derek (Stony Brook University)\nWe determin e the photon production rate at next to leading order\, i.e. through orde r $g^2 m_D/T$. At leading order\, photon production is determined by three processes: hard two-to-two collisions\, collinear bremsstrahlung\, and qu ark-conversions\, i.e. a process where the incoming quark transfers almost all of its momentum to the produced photon and the final state quark is s oft. At NLO\, wider angle bremsstrahlung must be treated carefully\, and the LPM suppressed leading order rate smoothly matches onto two-to-three p rocesses. Similarly\, asymmetric bremsstrahlung\, when the photon carri es a large momentum fraction of the incoming momentum and the final state quark is soft\, must be smoothly matched onto the quark conversion process present at leading order. We carefully include these rates without double counting to determine the full photon production rate at NLO.\n\nhttp://i ndico.cern.ch/contributionDisplay.py?contribId=526&sessionId=16&confId=181 055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=526&sessionId=1 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The NLO inclusive forward hadron production in pA collisions DTSTART;VALUE=DATE-TIME:20120817T190000Z DTEND;VALUE=DATE-TIME:20120817T192000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-527@cern.ch DESCRIPTION:Speakers: Dr. XIAO\, Bowen ()\nRecently\, by performing the co mplete next-to-leading order calculation\, we have demonstrated the one-lo op factorization for inclusive hadron productions in pA collisions in the saturation formalism. The differential cross section is written \ninto a f actorization form in the coordinate space at the next-to-leading order\, w hile the naive form of the convolution in the transverse momentum space do es not hold. The rapidity divergence with small-x dipole gluon distributio n of the nucleus is factorized into the energy evolution of the dipole glu on distribution function\, which is known as the Balitsky-Kovchegov equati on. Furthermore\, the collinear divergences associated with the incoming p arton distribution of the nucleon and the outgoing fragmentation\nfunction of the final state hadron are factorized into the splittings of the assoc iated parton distribution and fragmentation functions\, which allows us to reproduce the well-known DGLAP equation. The hard coefficient function\, which is finite and free\nof divergence of any kind\, is evaluated at one- loop order. This result is important\, not only for the phenomenological a pplications to the inclusive hadron production in p-A collisions at RHIC a nd future LHC experiment\, but also for theoretically promoting \nthe rigo rous developments towards a complete QCD factorization in small-x physics. \n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=527&sessionId=3 6&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=527&sessionId=3 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Non-linear anisotropic flow with ideal and viscous hydrodynamics DTSTART;VALUE=DATE-TIME:20120814T193500Z DTEND;VALUE=DATE-TIME:20120814T195500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-521@cern.ch DESCRIPTION:Speakers: Mr. YAN\, Li (Stony Brook University)\nThe particle spectrum from RHIC and LHC can be decomposed into harmonic series that def ines the dipolar flow $v_1$\, the elliptic flow $v_2$\, the triangular flo w $v_3$\, and $v_4$\, and $v_5$ etc. To understand the origin of higher or der harmonics\, we extend the linear response formalism for anisotropic fl ow to include the non-linear response which results from the interactions between the lowest harmonics and the elliptic flow. For example\, $v_{5(23 )}/(\\epsilon_2\n\\epsilon_3)$ records the $v_5$ generated by the non-line ar interactions between $v_2$ and $v_3$. Ideal and viscous hydrodynamic ca lculations show that the non-linear response becomes dominant for n=4 and n=5 in non-central collisions. This trend is much more pronounced for visc ous hydrodynamics where the linear response for n=4 and n=5 is negligible. \n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=521&sessionId=2 &confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=521&sessionId=2 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Gluon saturation effects on the color singlet J/Psi production in high energy dA and AA collisions DTSTART;VALUE=DATE-TIME:20120814T214500Z DTEND;VALUE=DATE-TIME:20120814T220500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-523@cern.ch DESCRIPTION:Speakers: TUCHIN\, Kirill (Iowa State University)\nWe discuss the gluon saturation/color glass condensate effects on J/Psi production in high energy pA and AA collisions. We report the results of numerical calc ulations of the corresponding nuclear modification factors. We found a goo d agreement between our calculations and the experimental data on J/Psi pr oduction in pA collisions. We also observe that cold nuclear modification effects alone cannot describe the data on J/psi production in AA collision s. Our numerical calculations indicate that the discrepancy arises in a si gnificant part from the higher pT’s. Additional final state suppression (at RHIC) and enhancement (at LHC) mechanisms are required to explain the experimental observations.\n\nhttp://indico.cern.ch/contributionDisplay.py ?contribId=523&sessionId=50&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=523&sessionId=5 0&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Highly-anisotropic hydrodynamics in 3+1 space-time dimensions and the early thermalization puzzle DTSTART;VALUE=DATE-TIME:20120815T125000Z DTEND;VALUE=DATE-TIME:20120815T131000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-528@cern.ch DESCRIPTION:Speakers: FLORKOWSKI\, Wojciech (Institute of nuclear Physics\ , Krakow)\, STRICKLAND\, Michael (Gettysburg College)\nRecently formulated model of highly-anisotropic and strongly dissipative hydrodynamics is use d in 3+1 dimensions to study behavior of matter produced in ultra-relativi stic heavy-ion collisions. We search for possible effects of the initial h igh anisotropy of pressure on the final soft-hadronic observables. We find that by appropriate adjustment of the initial energy density and/or the i nitial pseudorapidity distributions\, the effects of the initial anisotrop y of pressure may be easily compensated and the final hadronic observables become insensitive to early dynamics. \nOur results indicate that the ear ly thermalization assumption is not necessary to describe hadronic data\, in particular\, to reproduce the measured elliptic flow v2. The complete t hermalization of matter (local equilibration) may take place only at the t imes of about 1–2 fm/c\, in agreement with the results of microscopic mo dels.\n\nWork based on recent publications:\n\n1. Highly-anisotropic hydro dynamics in 3+1 space-time dimensions\,\nRadoslaw Ryblewski\, Wojciech Flo rkowski\, arXiv:1204.2624\n\n2. Projection method for boost-invariant and cylindrically symmetric dissipative hydrodynamics in 3+1 space-time dimens ions.\nWojciech Florkowski\, Radoslaw Ryblewski\, \nPhys.Rev. C85 (2012) 0 44902 \n\n3. Highly-anisotropic and strongly-dissipative hydrodynamics wit h transverse expansion.\nRadoslaw Ryblewski\, Wojciech Florkowski\, Eur.Ph ys.J. C71 (2011) 1761 \n\n4. Highly anisotropic hydrodynamics -- discussio n of the model assumptions and forms of the initial conditions.\nRadoslaw Ryblewski\, Wojciech Florkowski \nActa Phys.Polon. B42 (2011) 115\n\n5. N on-boost-invariant motion of dissipative and highly anisotropic fluid.\nRa doslaw Ryblewski\, Wojciech Florkowski\,\nJ.Phys.G G38 (2011) 015104 \n\n6 . Highly-anisotropic and strongly-dissipative hydrodynamics for early stag es of relativistic heavy-ion collisions.\nWojciech Florkowski\, Radoslaw R yblewski\nPhys.Rev. C83 (2011) 034907\n\nhttp://indico.cern.ch/contributio nDisplay.py?contribId=528&sessionId=12&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=528&sessionId=1 2&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Chiral phase transition in a confining cold dense matter DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-529@cern.ch DESCRIPTION:Speakers: Mr. SAZONOV\, Vasily (University of Graz)\nThe quest ion of the existence of a confining matter with restored chiral \nsymmetry at low temperatures and large density has been studied within\nthe confin ing and chirally symmetric model\, assuming a rigid quark Fermi surface. H owever\, in the confining matter near the Fermi surface quarks group into color-singlet baryons. Due to the interaction between quarks the quark Fer mi surface gets diffused. Here we show that such diffusion does not destro y a possible existence of a confining but chirally symmetric matter.\n\nht tp://indico.cern.ch/contributionDisplay.py?contribId=529&sessionId=37&conf Id=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=529&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Neutral meson flow in Pb-Pb collisions at the LHC with the ALICE E MCal DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-448@cern.ch DESCRIPTION:Speakers: ZHOU\, Fengchu (Central China Normal University (CN ))\nA central goal of the heavy-ion program at LHC is to study the propert ies of the quark-gluon plasma (QGP). The azimuthal anisotropy of particle production is a sensitive tool to study the features of the QGP. The anis otropy is typically characterized by $v_2$\, the second harmonic coefficie nt of the Fourier series expansion of the particle azimuthal distribution with respect to the reaction plane. The observed $v_2$ is believed to be s ensitive to different particle production mechanisms. At low transverse mo mentum ($p_{\\rm t}$) $v_2$ encodes the information of the expansion drive n by the initial pressure gradients. At high $p_{\\rm t}$ it may be caused by path-length dependent parton energy loss. At intermediate $p_{\\rm t}$ it may be related to the mechanism of quark coalescence.\n\nIn this poste r\, we present the $v_2$ measurements of $\\pi^{0}$ and $\\eta$ mesons usi ng data from the 2011 heavy-ion run at the LHC. The neutral mesons are rec onstructed using the ALICE Electromagnetic Calorimeter (EMCal)\, while the event plane is determined by the V0 detector. The measured $v_{2}$ is rep orted as a function of the transverse momentum for different centrality se lections. In order to study the systematic uncertainty\, the $v_2$ coeffic ient has been extracted using both the $dN/d#varphi$ method and invariant mass method. The determination of the event plane using different subdetec tors in ALICE\, as well as their resolution\, are also explored and discus sed.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=448&session Id=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=448&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Inclusive jet spectra in 2.76 TeV Pb-Pb collisions from the ALICE experiment DTSTART;VALUE=DATE-TIME:20120814T220500Z DTEND;VALUE=DATE-TIME:20120814T222500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-442@cern.ch DESCRIPTION:Speakers: REED\, Rosi Jan (Yale University (US))\nMeasurements of high-pt particle production in heavy-ion collisions at RHIC have shown that medium-induced energy loss affects the partons produced in the early stage of a heavy-ion collision. The increased initial production cross s ection for partons at LHC energies makes fully reconstruted jets available in a wide kinematic range\, which allows for a differential investigation of parton energy loss. Partonic energy loss allows us to access importan t observables for the study of the hot deconfined nuclear matter produced in heavy ion collisions. The inclusive cross-section of reconstructed jet s using the ALICE tracking detectors and electromagnetic calorimeter is pr esented from data collected during the 2.76 TeV Pb-Pb runs. The procedures used to reconstruct jets and extract them from a fluctuating background a re discussed. The results will also be compared with jet yields from prot on-proton collisions\, which allows quantification of the medium-induced q uenching effects.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribI d=442&sessionId=48&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=442&sessionId=4 8&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of direct photons in pp and Pb-Pb collisions with ALIC E DTSTART;VALUE=DATE-TIME:20120815T135000Z DTEND;VALUE=DATE-TIME:20120815T141000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-441@cern.ch DESCRIPTION:Speakers: WILDE\, Martin Rudolf (Westfaelische Wilhelms-Univer sitaet Muenster (DE))\nDirect photons are an important probe in diagnosing the highly excited state of nuclear matter created in heavy-ion collision s: They allow access to various stages of the collision including the ini tial state.\n\nThe ALICE detector is equipped with two high resolution ele ctromagnetic calorimeters and a central tracking system that make it well suited to study direct photon production at low and intermediate p_t. In a ddition to classical calorimeter measurements the low p_t regime can be ta rgeted via the measurement of photon conversion products by the ALICE TPC with high tracking efficiency.\n\nIn this talk the analysis of direct phot on production in pp (at sqrt(s) = 7 TeV) and Pb-Pb (at sqrt(s_NN) = 2.76 T eV) collisions is presented. The inclusive photon and neutral pion spectru m is measured via photon conversions in the ALICE setup. From the neutral pion yield a decay photon cocktail is deduced. The signal is obtained by c alculating the double ratio (gamma/pi0)/(gamma_decay/pi0). Implications on the search for a direct photon excess at low p_t will be discussed.\n\nht tp://indico.cern.ch/contributionDisplay.py?contribId=441&sessionId=10&conf Id=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=441&sessionId=1 0&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Neutral meson production in pp and Pb-Pb collisions at the LHC mea sured with ALICE DTSTART;VALUE=DATE-TIME:20120815T160000Z DTEND;VALUE=DATE-TIME:20120815T162000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-440@cern.ch DESCRIPTION:Speakers: PERESUNKO\, Dmitri (National Research Centre Kurchat ov Institute (RU))\nIdentified hadron spectra are considered to be sensiti ve to transport properties of strongly interacting matter produced in high -energy nucleus-nucleus collisions.\n\nWe present measurements of $\\pi^0$ and $\\eta$ mesons at mid-rapidity in a wide transverse momentum range in pp and Pb-Pb collisions at LHC energies measured with the ALICE detector. The mesons are reconstructed via their two-photon decays by two complemen tary methods\, using the electromagnetic calorimeters and the central trac king system for photons converted to electron-positron pairs on the materi al of the inner ALICE barrel tracking detectors.\n\nThe spectrum and the n uclear modification factor ($R_{AA}$) of the $\\pi^0$ production measured in Pb-Pb collisions at different collision centralities show a clear patte rn of strong suppression with respect to pp collisions. The azimuthal anis otropy ($v_{2}$) of the $\\pi^0$ production is consistent with $v_{2}$ for other hadron species. Comparison of the ALICE results on neutral mesons w ith those of lower-energy experiments is discussed.\n\nhttp://indico.cern. ch/contributionDisplay.py?contribId=440&sessionId=52&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=440&sessionId=5 2&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Neutral meson production spectra studies in pp collisions at 7 TeV with the ALICE EMCal DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-447@cern.ch DESCRIPTION:Speakers: GANOTI\, Paraskevi (Oak Ridge National Laboratory - (US))\nIn this poster\, $\\pi^0$ and $\\eta$ spectra in pp collisions at sqrt(s) = 7 TeV from the ALICE 2010 and 2011 runs (extended calorimeter ac ceptance) will be presented.\nThe neutral mesons are reconstructed via the ir two photon decay channel where both photons are measured with the ALICE EMCal. For the ALICE 2011 run both\, minimum bias and EMCal triggered dat a\, have been analyzed. A precise measurement of the production spectra re quires a thorough understanding of the response of the ALICE EMCal. Detail s of the analysis are described\, including comparisons of the EMCal respo nse with Monte Carlo \nsimulations in terms of energy non-linearity and re solution as measured in test beam data. Corrections and associated systema tic errors will be described.\n\nhttp://indico.cern.ch/contributionDisplay .py?contribId=447&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=447&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurements of fully reconstructed jet cross-section and jet stru cture in pp collisions at \\sqrt{s}=2.76 TeV with ALICE at the LHC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-445@cern.ch DESCRIPTION:Speakers: MA\, Rongrong (Yale University (US))\nJet properties are expected to be modified in the dense\, colored medium formed in Pb-Pb collisions at the LHC. To quantify such modifications\, the measurement o f reference distributions in pp collisions is essential. Jets are reconstr ucted from charged tracks measured in the ALICE central barrel\, as well a s the neutral energy measured in the Electromagnetic Calorimeter (EMCal). In this poster\, we present a measurement of inclusive differential jet cr oss section in pp collisions at \\sqrt{s}=2.76 TeV by combining Minimum-Bi as and EMCal triggered events in ALICE. The bias of the EMCal trigger\, wh ich selects events with a shower in EMCal of energy greater than 3 GeV\, i s corrected to extract the jet cross-section. Two different jet cone radi i R=0.2 and R=0.4 are used to reconstruct jets\, and the ratio of the cros s sections are reported. This provides first information on the jet energy profile.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=445&se ssionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=445&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of jet spectra with charged particles in Pb-Pb collisi ons at $\\sqrt{s_{NN}}$=2.76 TeV with the ALICE detector at the LHC DTSTART;VALUE=DATE-TIME:20120818T140000Z DTEND;VALUE=DATE-TIME:20120818T141000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-444@cern.ch DESCRIPTION:Speakers: VERWEIJ\, Marta (University of Utrecht (NL))\nWe rep ort a measurement of transverse momentum spectra of jets detected with the ALICE detector in Pb-Pb collisions at $\\sqrt{s_NN}$=2.76 TeV. Jets are r econstructed from charged particles using the anti-$k_{T}$ jet algorithm. The transverse momentum of tracks is measured down to 150 MeV/c which give s access\nto the low $p_{T}$ fragments of the jet. The background from sof t particle production is determined for each event and subtracted. The rem aining influence of underlying event fluctuations is quantified by embeddi ng different probes into heavy-ion data. The reconstructed transverse mome ntum spectrum is corrected for background fluctuations by unfolding. We co mpare the inclusive jet spectra reconstructed with radii between 0.2 and 0 .4 for different centrality classes and compare the jet yield in Pb-Pb and pp events.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=444& sessionId=29&confId=181055 LOCATION:Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=444&sessionId=2 9&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Dissipative effects in multi-component systems DTSTART;VALUE=DATE-TIME:20120817T211000Z DTEND;VALUE=DATE-TIME:20120817T213000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-108@cern.ch DESCRIPTION:Speakers: EL\, Andrej (University of Frankfurt)\nWe demonstrat e that the shear viscosity of a two-component mixture of point-like partic es has a non-trivial time dependence\, which is induced by the intrinsic c oupling between the two particle species. The shear viscosity coefficient of a mixture calculated using the Green-Kubo relation does not have this t ime dependence and hence is not sufficient to describe dissipatie hydrodyn amic behavior of a mixture. \n\nIn particular this means\, that the shear viscosity to entropy density values of a QGP or a hadron gas obtained from comparisons of elliptic flow $v_2$ calculated in standard one-component h ydrodynamic with measurements done at RHIC and LHC must also contain a tim e-dependence characterisitc for the mixture\, which so far has never been taken into account. \n\nThe results we present here are obtained using the kinetic transport model BAMPS as well as dissipative hydrodynamic calcula tions in 2+1 Dimensions.\n\nhttp://indico.cern.ch/contributionDisplay.py?c ontribId=108&sessionId=38&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=108&sessionId=3 8&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The importance of e+A collisions at an Electron-Ion Collider DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-109@cern.ch DESCRIPTION:Speakers: LAMONT\, Matthew (BNL)\nOver the last decade\, there has been a plethora of new and exciting results in heavy-ion collisions e manating from the CERN and Brookhaven Laboratories. These results have le d to a sea change of the view on how the evolution of a high energy heavy- ion collision proceeds. What has become apparent is that in order to vali date claims of perfect fluidity\, for example\, the initial conditions at small-x need to be well understood. Whilst d+A and p+A collisions provide a handle on some of these effects\, for precision measurements and precis e knowledge of the kinematics\, e+A collisions become essential.\n\nA prop osal has been developed at Brookhaven National Lab to add an electron acce lerator to the current RHIC complex\, providing for electron beams ranging from 5 GeV to 30 GeV. Complementing the programme on polarised e+p scatte ring\, a broad programme on e+A physics is envisioned which will range fro m investigating saturation physics at low-x to hadronization at high-x. I n this poster\, I will show the recent progress made on the golden measure ments which were identified in the proceedings of the Fall programme at th e INT [1].\n\n[1] “Gluons and the quark sea at high energies: Distributi ons\, polarization and tomography.”\,Eds D. Boer\, M. Diehl\, R. Milner\ , R. Venugopalan\, W. Vogelsang\, BNL-96164-2011\, INT-PUB-11-034\, JLAB-T HY-11-1373\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=109&s essionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=109&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurements of low-momentum thermal photons in Au+Au collisions w ith the PHENIX detector DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-598@cern.ch DESCRIPTION:Speakers: BANNIER\, Benjamin ()\nPhotons are produced at all s tages of a nuclear collision. Because of their\nextremely small interactio n rate with the hadronic medium any information they\ncarry about their pr oduction environment is accessible nearly undistorted in\ntheir final stat e. Photons are produced in hadronic decays\, hard scatterings\nof initial state partrons\, jet-photon conversions and from thermal radiation\nof the medium. At the lowest photon momenta hadronic decays and thermal\nproduct ion are the dominant sources. Any direct measurement of low-momentum\npho tons is challenging in an electro-magnetic calorimeter due to large\nbackg rounds and measurement uncertainties from hadron contamination in this\nen ergy regime. We will present a method for measuring real photons with\next ernal conversions with the PHENIX detector that allows measurements of\nth ese photons with improved systematic uncertainties.\n\nhttp://indico.cern. ch/contributionDisplay.py?contribId=598&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=598&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Development of the Silicon Tracking System for the Compressed Bary onic Matter (CBM) Experiment at FAIR DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-100@cern.ch DESCRIPTION:Speakers: Dr. ESCHKE\, Juergen (GSI Helmholtzzentrum)\nThe Com pressed Baryonic Matter (CBM) experiment will conduct a comprehensive rese arch programme on nuclear matter at high net baryonic densities. The Silic on Tracking System (STS) is the central detector of the CBM experiment. It s task is the standalone trajectory reconstruction of the high multiplicit ies of charged particles originating from high-rate beam-target interactio ns. The detector system shall be operational from the start of the CBM phy sics program at SIS-100 in 2018\, and later at SIS-300. The silicon micros trip detectors must be radiation hard and are red out by a fast self-trigg ering front-end electronics. A low-mass construction must be achieved avoi ding the front-end electronics\, the cooling and cabling infrastructure in the aperture. The layout of the STS\, mechanical constraints and the expe cted radiation environment will be shown. Progress with the STS engineerin g design will be presented as well as results from in-beam tests of protot ypes.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=100&sessio nId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=100&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Signature of liquid-gas phase transition and critical behavior in projectile multifragmentation DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-101@cern.ch DESCRIPTION:Speakers: Ms. TALUKDAR\, Rupalim (Department of Physics\, Gauh ati University\, India)\nA high-statistics exclusive study of the multifra gmentation of Mg-Em interaction at 4.5 AGeV has been performed to real ize the critical behaviour. A number of relevant observables such as fluct uation in the sizes of the largest cluster\, reduced variance and the mean value of second moment of charge distribution were estimated with the exp erimental data. The observed results are compared with the results of Kr-E m interaction at 0.95 AGeV as well as the results of EOS collaboration for Au\, La and Kr on carbon at 1 AGeV. Systematic variation in the heights a nd positions of the peaks observed with the change of the fragmenting nucl ei thereby confirms the critical behaviour and a possible association of l iquid-gas phase transition on multifragmentation mechanism.\n\nhttp://indi co.cern.ch/contributionDisplay.py?contribId=101&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=101&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Hydrodynamics at large baryon densities: Understanding proton vs. anti-proton v_2 from baryon number conservation DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-107@cern.ch DESCRIPTION:Speakers: Dr. STEINHEIMER-FROSCHAUER\, Jan (Lawrence Berkeley National Laboratory)\nUsing hydrodynamics we explore the effects of the in itial state\,\nbaryon stopping and baryon number transport on various obse rvables such\nas spectra\, elliptic flow and particle yields for heavy ion collisions\nat beam energies from sqrt{s_{NN}}=7.7 to 200 GeV. We find th at\nobserved phenomena such as the centrality dependent freeze out\nparame ters as well as the apparent difference in particle and\nanti-particle v_2 can be explained by a collective hydrodynamic\nexpansion\, once baryon st opping and baryon number conservation are\nproperly taken into account. We will further discuss how the various\nstages of the collision contribute to the p_{t} spectra\, the mass dependence of T_{eff} and particle ratio f luctuations.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=107 &sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=107&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The Compressed Baryonic Matter Experiment at FAIR - physics at SI S-100 and SIS-300 DTSTART;VALUE=DATE-TIME:20120817T194000Z DTEND;VALUE=DATE-TIME:20120817T200000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-105@cern.ch DESCRIPTION:Speakers: HEUSER\, Johann (GSI - Helmholtzzentrum fur Schwerio nenforschung GmbH (DE))\nThe Compressed Baryonic Matter (CBM) Experiment w ill explore the phase diagram of strongly interacting matter in the region of high net baryon densities. The experiment is laid out to process nucle ar collisions at rates up to 10 MHz\, the highest in the field. A unique w ide spectrum of observables will be accessible\, including rarest probes l ike hadrons containing charm quarks\, or multi-strange hyperons. \nThe rea lization of the full CBM physics programme requires heavy-ion beams of ene rgies up to 45 GeV/nucleon. Those will be delivered by the SIS-300 synchro tron at the completed FAIR accelerator complex. Parts of the research prog ramme can already be addressed with the SIS-100 synchrotron installed in t he same machine tunnel for the start phase of FAIR. The initial energy ran ge of up to 11 GeV/nucleon for heavy nuclei\, 14 GeV/nucleon for light nuc lei\, and 29 GeV for protons\, allows addressing the equation of state of compressed nuclear matter\, the properties of hadrons in a dense medium\, the production and propagation of charm near the production threshold\, an d exploring the third\, strange dimension of the nuclide chart. \nIn the p resentation we discuss the CBM physics programmes and the detector setup w ith focus on the first years of operation at FAIR\, along with an outline of the recently begun construction of the accelerator facility.\n\nhttp:// indico.cern.ch/contributionDisplay.py?contribId=105&sessionId=25&confId=18 1055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=105&sessionId=2 5&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Microcanonical Tsallis statistics in jet fragmentation at LHC and LEP DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-39@cern.ch DESCRIPTION:Speakers: UERMOESSY\, Karoly (Hungarian Academy of Sciences (H U))\nFor the description of hadronic spectra in high-energy nuclear reacti ons\, it is essential to understand the process of hadronisation. However\ , hadron creation is still an unsettled matter from the theoretical point of view.\n\nIn the talk\, I show that hadron distributions inside jets (fr agmentation functions) created in s^1/2 = 7 TeV (LHC) proton-proton [1] an d also in high-energy electron-positron [2] collisions can be described by a statistical jet-fragmentation model. This model combines microcanonical statistics and super-statistics induced by multiplicity fluctuations. The resulting scale dependence of the parameters of the model turns out to be similar to what was observed in electron-positron annihilations in Ref. [ 2].\n\n[1] Phys. Lett. B 701: 111-116\, 2011\; arXiv:1101.3023\n[2] Submit ted to PLB\, arXiv:1204.1508\n\nhttp://indico.cern.ch/contributionDisplay. py?contribId=39&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=39&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Neutron Stars and Functional Renormalization Group DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-38@cern.ch DESCRIPTION:Speakers: Mr. DREWS\, Matthias (Technische Universitaet Muench en)\nRecently a two-solar-mass neutron star was observed. This puts new co nstraints on effective models at zero temperature and high chemical potent ial. In our approach we include mesonic degrees of freedom as well as nucl eons in the framework of the Functional Renormalization Group. In this way \, fluctuations beyond the mean-field approximation are taken into account .\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=38&sessionId=3 7&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=38&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Thermal Photon emission with partial chemical equilibrium equation of state DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-33@cern.ch DESCRIPTION:Speakers: SHEN\, Chun (Ohio State University)\nPhotons are bel ieved to be clean and penetrating probes of the medium created in ultra-re lativistic heavy-ion collisions. The thermal photon spectra and their anis otropy are known to be very sensitive to the thermalization time\, the spe cific shear viscosity\, the equation of state of produced matter\, and the initial state fluctuations [1]. Previous computations of photon emission spectra have been mostly carried out in a fully thermalized medium evolvin g dynamically under the influence of an equation of state with a first ord er phase transition. Today\, a realistic state-of-the-art equation of stat e based on lattice QCD results and partial chemical equilibrium (PCE) in t he hadronic phase is available for relativistic hydrodynamic simulations [ 2]. The non-zero chemical potentials will enhance thermal photon productio n rates in the hadronic phase by their corresponding non-equilibrium fugac ity factor ~ e^{mu/T}. However\, the breaking of chemical equilibrium belo w the quark hadron phase transition also changes the relation between temp erature and energy density\, which results in faster cooling evolution dur ing the hadronic phase. This reduces the space-time volume for photon emis sion from the hadronic phase. In this work\, we study PCE effects on the y ields and the azimuthal anisotropies of produced thermal photons in heavy- ion collisions at RHIC and LHC energies\, using a realistically evolving h ydrodynamic medium. We study in detail the interplay between the chemical potential enhancement in the thermal photon emission rates and faster cool ing evolution of the medium. We compare our calculations with data from RH IC\, and make predictions for measurements at the LHC.\n\n\n[1] M. Dion\, J. F. Paquet\, B. Schenke\, C. Young\, S. Jeon and C. Gale\, "Viscous pho tons in relativistic heavy ion collisions\,'' Phys. Rev. C 84\, 064901 (2 011)\n\n[2] Chun Shen\, Ulrich Heinz\, Pasi Huovinen and Huichao Song\, "S ystematic parameter study of hadron spectra and elliptic flow from viscous hydrodynamic simulations of Au+Au collisions at √s_{NN} = 200A GeV\,'' Phys. Rev. C 82\, 054904 (2010)\n\nhttp://indico.cern.ch/contributionDispl ay.py?contribId=33&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=33&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Collision Energy Dependence of Viscous Hydrodynamic Flow in Relat ivistic Heavy-Ion Collisions DTSTART;VALUE=DATE-TIME:20120814T191500Z DTEND;VALUE=DATE-TIME:20120814T193500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-32@cern.ch DESCRIPTION:Speakers: SHEN\, Chun (Ohio State University)\nWe present a sy stematic study on the evolution of hadron spectra and their azimuthal anis otropy from the lowest collision energy studied at the Relativistic Heavy Ion Collider (RHIC)\, √s = 7.7A GeV\, to the highest energy reachable at the Large Hadron Collider (LHC)\, √s = 5500A GeV [1]. As the collision energy increases\, the resulting increases of the initial temperature\, an d fireball lifetime\, as well as the evolution of the centrality dependenc e of final charged particle multiplicity are quantitatively studied and co mpared between the two most popular initial state models\, the Monte Carlo Glauber and Monte-Carlo Kharzeev-Levin-Nardi (MC-KLN) models. For Glauber model initial conditions with a small specific shear viscosity eta/s = 0. 08\, the differential charged hadron elliptic flow v_2^{ch}(pT\, √s) is found to exhibit a very broad maximum as a function of √s around top RHI C energy\, rendering it almost independent of collision energy for 39 \n\ nhttp://indico.cern.ch/contributionDisplay.py?contribId=32&sessionId=2&con fId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=32&sessionId=2& confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurements of identified hadron spectra p+p interactions at 20\, 31\, 40\, 80 and 156 GeV/c from NA61/SHINE at the CERN SPS. DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-31@cern.ch DESCRIPTION:Speakers: PULAWSKI\, Szymon Mateusz (University of Silesia (PL ))\nPreliminary NA61/SHINE results on π+\, π-\, K+\, K-\, p and pbar sp ectra in p+p interactions at 20-158 GeV/c will be presented. NA61/SHINE at the CERN SPS is a fixed-target experiment pursuing a rich physics program [1]. Thanks to its large acceptance and excellent particle identification capability NA61/SHINE is well suited for performing high-precision parti cle production measurements in p+p\, p+nucleus and nucleus+nucleus collisi ons. In this contribution inclusive spectra of π+\, π-\, K+\, K-\, p and pbar in p+p interactions at the SPS energies will be shown as a function of transverse momentum/mass and rapidity. The new data will be compared wi th the corresponding results of NA49 for central Pb+Pb collisions as well as with the predictions of Monte Carlo models.\n\n\n\n[1] N.Antoniou et a l. [NA61/SHINE Collaboration]\, CERN SPSC-2007-019\, (2007).\n\nhttp://ind ico.cern.ch/contributionDisplay.py?contribId=31&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=31&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Intense Magnetic Field Production in Non-Central Relativistic Nucl eus-Nucleus Collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-30@cern.ch DESCRIPTION:Speakers: SHIGAKI\, Kenta (Hiroshima University (JP))\nA very intense magnetic field is expected in non-central nucleus-nucleus collisio ns\, and to reach ~ 10^14 T at the LHC energies. Not only being the stron gest magnetic field in the Universe (cf. ~ 10^11 T on the surface of magne tars)\, various consequences of physics interests are in discussion\, incl uding chiral magnetic effects\, synchrotron radiation\, and non-linear beh aviors of QED e.g. photon splitting and real photon decaying into dilepton s. It should be however noted that the field itself is yet to be directly detected. We evaluate the expected intensity and life time of the field\ , based on cascade and static models\, and its possible effects on real/vi rtual photon anisotropy and polarization\, based on QED calculations of ph oton vacuum polarization tensors. A new approach to detect the field via direct virtual photon polarization is proposed and its experimental feasib ilities at ALICE and PHENIX experiments are examined.\n\nhttp://indico.cer n.ch/contributionDisplay.py?contribId=30&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=30&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:A way to acquire some current quark mass from a general relativist ic effect DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-37@cern.ch DESCRIPTION:Speakers: Dr. KIESS\, Thomas (self)\nWe calculate a way to acq uire some current quark mass from a general relativistic effect. For a ba re quark\, we model that boundary conditions on the spacetime metric can p lausibly couple the value of current quark mass to the charge\, via extern al pressure (e.g.\, as supplied by a background field) at sub-fm length sc ales. This mechanism acquires some (up to ~ 40%) current quark mass “fr om” the charge. To construct an approximate metric\, we model a bare qu ark as a spherically symmetric static perfect fluid with charge\, using a recent exact Maxwell-Einstein metric for the interior\, out to a radius r at which the boundary condition is to match to the Reissner-Nordström met ric (for spacetime external to a charged mass). At r\, the model produces internal pressure\, which should be matched to external pressure. For re ported values of quark charges q and bare masses mq\, this construction pr oduces sub-fm radii. Although the metric at this radius differs only pert urbatively from a flat spacetime\, the matching condition is more signific ant and couples the current quark mass to the charge.\n\nhttp://indico.cer n.ch/contributionDisplay.py?contribId=37&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=37&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:LPM effect as the origin of the jet fragmentation scaling in heavy ion collisions. DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-36@cern.ch DESCRIPTION:Speakers: LOSHAJ\, Frasher (S)\nWe address a recent puzzling r esult from the LHC: the jet fragmentation functions measured in $PbPb$ an d $pp$ collisions appear very similar in spite of a large medium-induced e nergy loss (we will call this ``jet fragmentation scaling"\, JFS). To mod el the real-time non-perturbative effects in the propagation of a high ene rgy jet through the strongly coupled QCD matter\, we adopt an effective di mensionally reduced description in terms of the $(1+1)$ quasi-Abelian Sch winger theory. This theory is exactly soluble at any value of the coupling and shares with QCD the properties of dynamical generation of ``mesons" w ith a finite mass and the screening of ``quark" charge that are crucial f or describing the transition of the jet into hadrons. We find that this ap proach describes quite well the vacuum jet fragmentation in $e^+e^-$ annih ilation \nat $z\\geq0.2$ at jet energies in the range of the LHC heavy ion measurements ($z$ is the ratio of hadron and jet momenta). In QCD medium\ , we find that the JFS is reproduced if the mean free path $\\lambda$ of t he jet is short\, $\\lambda \\leq 0.3$ fm\, which is in accord with the sm all shear viscosity inferred from the measurements of the collective flow. The JFS holds since at short mean free path the quantum interference (ana logous to the Landau-Pomeranchuk-Migdal effect in QED) causes the produced mesons to have low momenta $p \\sim m$\, where $m \\simeq 0.6$ GeV is the typical meson mass. Meanwhile the induced jet energy loss at short mean free path is much larger than naively expected in string models.\n\nhttp:/ /indico.cern.ch/contributionDisplay.py?contribId=36&sessionId=37&confId=18 1055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=36&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Silicon pixel and strip detector development for the upgrade of th e ALICE Inner Tracking System DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-601@cern.ch DESCRIPTION:Speakers: CONTIN\, Giacomo (Universita e INFN (IT))\nThe main physics motivation for the upgrade of the Inner Tracking System of the ALI CE experiment is to perform new measurements on charm and beauty productio n in heavy-ion collisions\, dealing with the challenge of expected Pb-Pb i nteraction rates of up to 50 kHz. For this purpose\, a new silicon tracker is needed with greatly improved features in terms of determination of the distance of closest approach to the primary vertex\, standalone tracking efficiency at low transverse momentum\, momentum resolution and readout ra te capabilities.\nThe ITS upgrade foresees to replace the present ITS dete ctor with a new seven layer silicon vertex detector. Two layouts are being considered: Layout 1 foresees to equip all layers with monolithic silicon pixel detectors\; Layout 2 will consist of 3 layers of hybrid silicon pix el detectors and 4 layers of double-sided silicon strip detectors. For the innermost layers\, there is a strong effort to decrease the pixel dimensi ons to about 20-30 um in the bending direction and equivalently in the bea m direction and to reduce the material budget from 1.1% to 0.3% of X0\, by using monolithic pixel detectors or hybrid pixel detectors with thinned c hip and sensor\, and minimizing the contribution coming from supports and services. The different types of monolithic pixel detectors under consider ation for the ALICE ITS upgrade are: the rolling shutter\, low power\, arc hitecture of the MIMOSA26 and ULTIMATE sensors\, moved to a 0.18 um techno logy node\; the INMAPS prototype\, an in-pixel hit discrimination CMOS sen sor based on a deep p-well extension of a triple-well 0.18 um CMOS\; the L ePIX development\, a drift-based monolithic sensor in very deep submicron CMOS. The expected radiation levels for the innermost layer (685 krad TID\ , 10^13 neq per year) will require a careful validation of the different t echnologies in terms of radiation resistance. On the outermost layers the needed granularity and pointing resolution can be ensured by a strip detec tor geometry with a small cell size (95 um strip pitch\, 22 mm strip lengt h) and a small strip inclination with respect to the beam direction. The i nformation on the signal amplitude will be preserved for the strip sensors for particle identification purposes. The strip readout chip will incorpo rate a low power ADC with 10 bits resolution. \nThe present status of the technology development for the considered options will be reported.\n\nhtt p://indico.cern.ch/contributionDisplay.py?contribId=601&sessionId=37&confI d=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=601&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Theoretical Predictions for Nuclear Effects in the Asymmetric Coll isions of the LHC at 4.4 ATeV DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-34@cern.ch DESCRIPTION:Speakers: BARNAFOLDI\, Gergely (Hungarian Academy of Sciences (HU))\nAsymmetric high-energy proton-nucleus collision can give unique tes t of the high-energy nuclear effects. This case nuclear modification and r apidity asymmetry can be describe in parallel [1]. Moreover\, measurements might enable us to separate or at least understand better the the mechani sms of the final and initial state nuclear effects in nucleus-nucleus coll isions.\n\nPredictions for nuclear effects in proton-nucleus (pA or dA) ar e presented here in wide rapidity ranges (both forward and backward direct ions) at 200 AGeV RHIC and 4.4 ATeV LHC energies similarly as in Ref[2] fo r midrapidity. We used a collinear factorized perturbative QCD-improved pa rton model [3] calculations\, including various types of nuclear shadowing parameterizations and models for multiple scattering. We determined the n uclear modification factor\, R_{pPb}(p_T) and rapidity asymmetry\, Y_{asym }(p_T) and their uncertainties. The scaling behavior of these effect and s eparation method is also presented.\n\n[1] A Adeluyi et al. Phys.Rev. C80 (2009) 014903\n[2] G.G. Barnaföldi et al Phys.Rev. C85 (2012) 024903\n[3] Y. Zhang et al. Phys.Rev. C65 (2002) 034903\n\nhttp://indico.cern.ch/cont ributionDisplay.py?contribId=34&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=34&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Results on identified particle spectra from ALICE DTSTART;VALUE=DATE-TIME:20120814T141000Z DTEND;VALUE=DATE-TIME:20120814T143000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-641@cern.ch DESCRIPTION:Speakers: IVANOV\, Marian (GSI - Helmholtzzentrum fur Schwerio nenforschung GmbH (DE))\nhttp://indico.cern.ch/contributionDisplay.py?cont ribId=641&sessionId=35&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=641&sessionId=3 5&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:PHENIX High pT DTSTART;VALUE=DATE-TIME:20120814T135000Z DTEND;VALUE=DATE-TIME:20120814T141000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-640@cern.ch DESCRIPTION:Speakers: MCCUMBER\, Michael (University of Colorado)\nhttp:// indico.cern.ch/contributionDisplay.py?contribId=640&sessionId=35&confId=18 1055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=640&sessionId=3 5&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Heavy Flavor Results from STAR DTSTART;VALUE=DATE-TIME:20120814T151500Z DTEND;VALUE=DATE-TIME:20120814T153500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-643@cern.ch DESCRIPTION:Speakers: XIE\, Wei (Purdue University (US))\nhttp://indico.ce rn.ch/contributionDisplay.py?contribId=643&sessionId=6&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=643&sessionId=6 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Jet Discussion DTSTART;VALUE=DATE-TIME:20120814T143000Z DTEND;VALUE=DATE-TIME:20120814T144500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-642@cern.ch DESCRIPTION:Speakers: \nhttp://indico.cern.ch/contributionDisplay.py?contr ibId=642&sessionId=35&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=642&sessionId=3 5&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Results on heavy flavors from ALICE DTSTART;VALUE=DATE-TIME:20120814T155500Z DTEND;VALUE=DATE-TIME:20120814T161500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-645@cern.ch DESCRIPTION:Speakers: CONESA DEL VALLE\, Zaida (CERN)\nhttp://indico.cern. ch/contributionDisplay.py?contribId=645&sessionId=6&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=645&sessionId=6 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:PHENIX Heavy Flavors DTSTART;VALUE=DATE-TIME:20120814T153500Z DTEND;VALUE=DATE-TIME:20120814T155500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-644@cern.ch DESCRIPTION:Speakers: Prof. ROSATI\, Marzia (Iowa State University)\nhttp: //indico.cern.ch/contributionDisplay.py?contribId=644&sessionId=6&confId=1 81055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=644&sessionId=6 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Heavy Flavor Discussion DTSTART;VALUE=DATE-TIME:20120814T163500Z DTEND;VALUE=DATE-TIME:20120814T165000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-647@cern.ch DESCRIPTION:Speakers: \nhttp://indico.cern.ch/contributionDisplay.py?contr ibId=647&sessionId=6&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=647&sessionId=6 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Correlation between isolated photons and charged hadrons in pp and Pb-Pb collisions measured with ALICE DTSTART;VALUE=DATE-TIME:20120814T191500Z DTEND;VALUE=DATE-TIME:20120814T193500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-439@cern.ch DESCRIPTION:Speakers: ARBOR\, Nicolas (Centre National de la Recherche Sci entifique (FR))\nGamma-hadron correlations measured in heavy-ion collision s produced at the LHC allow to investigate medium induced jet modification s in a transverse momentum (p_t) range below 50 GeV/c\, where jet reconstr uction is challenging because of the relatively large contribution from th e underlying event. At high p_t direct photons\, produced in Compton and a nnihilation QCD leading order processes\, are associated to a jet in oppos ite direction. Such processes are tagged experimentally by identifying lea ding isolated photons and their correlated associated hadrons in opposite azimuthal direction. The jet fragmentation is estimated from the hadrons a nd the photon p_t via the imbalance parameter x_E = -\\vec{p_t\,h}\\vec{p_ t\,g} / |p_t\,g|^2. The remaining contamination from neutral meson decay p hotons is subtracted statistically.We present the first results extracted from gamma-hadron correlations measured in Pb-Pb collisions at sqrt(s_NN) = 2.76 TeV\, triggered by the ALICE electromagnetic calorimeters. Medium e ffects will be studied by comparison to results from pp collisions data at sqrt(s) = 7 TeV\, combined with a smaller dataset at sqrt(s) = 2.76 TeV.\ n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=439&sessionId=3& confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=439&sessionId=3 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Results on quarkonia from ALICE DTSTART;VALUE=DATE-TIME:20120816T152500Z DTEND;VALUE=DATE-TIME:20120816T154500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-649@cern.ch DESCRIPTION:Speakers: SCOMPARIN\, Enrico (Universita e INFN (IT))\nhttp:// indico.cern.ch/contributionDisplay.py?contribId=649&sessionId=41&confId=18 1055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=649&sessionId=4 1&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Overview of results on heavy flavor and quarkonia from the CMS col laboration DTSTART;VALUE=DATE-TIME:20120816T150500Z DTEND;VALUE=DATE-TIME:20120816T152500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-648@cern.ch DESCRIPTION:Speakers: MIRONOV\, Camelia (Ecole Polytechnique (FR))\nhttp:/ /indico.cern.ch/contributionDisplay.py?contribId=648&sessionId=41&confId=1 81055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=648&sessionId=4 1&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Di-jet properties in pp at sqrt(s) = 7 TeV and Pb-Pb at sqrt(s_NN) = 2.76 by LHC-ALICE DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-434@cern.ch DESCRIPTION:Speakers: CHUJO\, Tatsuya (University of Tsukuba (JP))\nA di-j et produced by a hard scattering of partons plays a vital role to characte rize the properties of hot and dense QCD matter produced in Pb-Pb collisio ns at LHC. In particular\, a di-jet is one of the key probes to look for a medium response due to a strong jet quenching effect\, as reported by the CMS and ATLAS collaborations. In this analysis\, we used the data collect ed by the ALICE collaboration\, in pp collisions at sqrt(s) = 7 TeV and Pb -Pb collisions at sqrt(s_NN) = 2.76 TeV. Charged and neutral leading jets have been used to study the momentum balance with the recoiling charged je t. The di-jet momentum balance (A_J) in pp at sqrt(s) = 7 TeV as a functio n of charged particle multiplicity has been measured and is compared with the PYTHIA simulation. We also report the status of an analysis of di-jet measurement in Pb-Pb collisions at sqrt(s_NN) = 2.76 TeV to search for a p ossible medium response by a propagation of high energy jet\, which is sen sitive to parton energy loss.\n\nhttp://indico.cern.ch/contributionDisplay .py?contribId=434&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=434&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Jet structure in 2.76 TeV Pb–Pb collisions at ALICE DTSTART;VALUE=DATE-TIME:20120815T125000Z DTEND;VALUE=DATE-TIME:20120815T131000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-432@cern.ch DESCRIPTION:Speakers: CUNQUEIRO\, Leticia (Unknown-Unknown-Unknown)\nTo ca pture the full dynamics of the mechanisms of energy loss of hard partons i n their passage through the dense medium created in Heavy Ion Collisions\, jet reconstruction is required. In this\nanalysis we explore the radiatio n pattern of jets in Pb–Pb collisions at sqrt(s_NN) = 2.76 TeV and compa re it to that of baseline pp jets at the same collision energy. Di-jets ar e selected by requiring a high-pt (’trigger’) fragment back-to-back wi th respect to the jet that is studied. Then\, the shape and energy distrib ution of those quenched jets is explored via jet-hadron azimuthal correlat ions and via the mapping of the energy contained in different cones with r adius R around the jet axis.\n\nhttp://indico.cern.ch/contributionDisplay. py?contribId=432&sessionId=11&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=432&sessionId=1 1&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Unfolding of ALICE tracking and calorimeter response to fully reco nstructed jets in Pb-Pb collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-433@cern.ch DESCRIPTION:Speakers: ADARE\, Andrew Marshall (Yale University (US))\nObse rvables involving fully reconstructed jets provide access to key propertie s of the quark-gluon plasma via partonic energy loss. In order to obtain t he inclusive transverse momentum distribution of fully reconstructed jets using the ALICE tracking detectors and electromagnetic calorimeter\, the s mearing effect of non-ideal detector responses must be understood and corr ected. The procedure for assessing these response effects will be explaine d. In addition\, the unfolding techniques that are applied to measured dis tributions are described\, and the results and their uncertainties will be presented.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=433& sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=433&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Two-baryon correlations in heavy-ion collisions at the LHC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-431@cern.ch DESCRIPTION:Speakers: SALZWEDEL\, Jai (Ohio State University (US))\nIn hea vy-ion collisions produced at the LHC a significant number of baryons is e mitted in each collision. Two-particle correlations of those baryons carry important information about the emitting source and the interaction betwe en them. \n\nAt low relative momentum femtoscopic correlations arise\, whi ch are sensitive to the homogeneity lengths of the system. Hydrodynamic mo dels predict that these will decrease with increasing transverse mass of t he pair. Such a decrease is universally reported for pions\, also at the L HC. Baryons\, having a much larger mass\, allow to significantly extend th e range of measured m_T. The results from baryon femtoscopy would put a st rong constraint on such predictions. Non-identical baryon pairs are also s ensitive to emission\nasymmetries.\n\nFemtoscopic correlations between bar yons arise mostly due to the strong interaction\, which is not precisely k nown for some baryon pair types. The most notable example is the lambda-la mbda interaction which has an unknown contribution due to the potential ex istence of the H0 dibaryon. Equally interesting are baryon-antibaryon pote ntials\, which have significant contributions from annihilation channels. These processes may have an impact on single-particle spectra\, and should be investigated as one of the possible sources of the small proton yield at the LHC.\n\nWe show the two-particle correlation functions for several pair types (both baryon-baryon and baryon-antibaryon) composed of protons and lambdas. Femtoscopic analysis is carried out for proton pairs\, takin g into account residual correlations and annihilation\nchannel for the pro ton-antiproton system. Correlations with lambdas are also analyzed\, both with femtoscopic methods as well as to study the unknown interaction poten tials.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=431&sessi onId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=431&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Performance of PHENIX Silicon Vertex Tracker(VTX) DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-339@cern.ch DESCRIPTION:Speakers: ASANO\, Hidemitsu (Kyoto Univ.)\nThe PHENIX experime nt at the Relativistic Heavy Ion Collider (RHIC) at\nBrookhaven National L aboratory has been upgraded by installing a\nSilicon Vertex Tracker (VTX). The VTX has been developed for heavy flavor (charm and bottom) measuremen ts and dedicated to precise tracking of primary and secondary vertices. R esolution of primary vertex reconstruction and distance of closet approach (DCA) to distinguish secondary particles from\nin-flight decays are requi red several ten microns.　In this way\, we will be able to statistically separate the heavy-quark production of charm and beauty.\n\nIn this poster \, we will discuss the tracking performance of\nVTX: resolution of primary vertex and DCA measurements. Performance of\nalignment and tracking effic iency will be also presented.\n\nhttp://indico.cern.ch/contributionDisplay .py?contribId=339&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=339&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Calculating Jet Transport Coefficients in Lattice Gauge Theory DTSTART;VALUE=DATE-TIME:20120816T180000Z DTEND;VALUE=DATE-TIME:20120816T182000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-338@cern.ch DESCRIPTION:Speakers: Dr. MAJUMDER\, Abhijit (Wayne State University)\nThe in-medium modification of a hard jet is reformulated to consider the proc ess of a hard parton propagating through a finite sized QCD medium\, held at a fixed high temperature and vanishing chemical potential. The process is factorized into a hard part representing the propagation and scattering of the parton\, and a soft part representing the non-perturbative color f ield experienced by the jet in the medium. A series of such non-perturbati ve\, soft\, transport coefficients are identified\, and formulated in term s of well defined operator products. These operator products are then expa nded in a series of power suppressed local operators\, which are then eval uated non-perturbatively using quenched lattice gauge theory.\n\nhttp://in dico.cern.ch/contributionDisplay.py?contribId=338&sessionId=18&confId=1810 55 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=338&sessionId=1 8&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The eta dependence of charged particle v_n measurements using the Silicon Vertex detector at RHIC-PHENIX DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-335@cern.ch DESCRIPTION:Speakers: Mr. NAKAGOMI\, Hiroshi (Univ. of Tsukuba)\nIn heavy- ion collisions\, measurement of azimuthal anisotropy in emitted particle m omentum distribution is a one of the important themes for the investigatio n of Quark Gluon Plasma (QGP). For this measurements\, we need to be able to measure the reference\nreaction/event planes direction with good accura cy.\n\n In 2011 the Silicon Vertex detector (VTX) was installed in the RHI C-PHENIX experiment. The VTX is composed of four layers\, in which the inn er two layers are built with pixel detectors and the outer two layers are built with strip detectors.\nThe VTX can reconstruct charged particle trac ks and identify hadrons that include c/b-quark. The reaction plane reconst ructed using the VTX is expected to have good resolution due to the wide e ta acceptance of the detector\, -1 to +1. One of the main\npurposes of VT X detector is to enable the measurement of the second and higher-order azi muthal anisotropy (v2\,v3) of heavy quarks.\n\n In this presentation\, we will discuss the performance of the VTX detector in reaction plane resolut ion\, as well as event plane correlations between different harmonic order s and between silicon and non-silicon detectors which have different eta a cceptance. The eta dependence of higher order anisotropy will also be show n as\npart of a detailed investigation of non-flow effect as a function of eta-gap.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=335&se ssionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=335&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Improving the $J/\\psi$ Production Baseline in $pp$ and $pA$/d+Au Interactions at RHIC and the LHC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-334@cern.ch DESCRIPTION:Speakers: Prof. VOGT\, Ramona (LLNL and UC Davis)\nWe assess t he theoretical uncertainties on the inclusive $J/\\psi$ production\ncross section in the Color Evaporation Model using values for the charm quark\nm ass\, renormalization and factorization scales obtained\nfrom a fit to the charm production data [1]. We use our new results to provide\nimproved b aseline comparison calculations at RHIC. \nWe also study the rapidity\, $p_T$ and centrality dependence of cold \nnuclear matter effects on $J/\\p si$\nproduction in the CEM [2\,3].\\\\[3ex]\n\n\\noindent [1] R. E. Nelso n\, R. Vogt and A. D. Frawley\, in preparation.\\\\\n\n\\noindent [2] R. E. Nelson and R. Vogt\, in progress.\\\\\n\n\\noindent [3] D. McGlinchey\, A. D. Frawley and R. Vogt\, in preparation.\n\nhttp://indico.cern.ch/cont ributionDisplay.py?contribId=334&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=334&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Centrality dependence of freeze-out parameters from the Beam Energ y Scan at STAR DTSTART;VALUE=DATE-TIME:20120817T190000Z DTEND;VALUE=DATE-TIME:20120817T192000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-337@cern.ch DESCRIPTION:Speakers: DAS\, SABITA (I)\nThe RHIC Beam Energy Scan (BES) pr ogram aims to study the QCD phase diagram. The main focus is to search for signals of the hypothesized critical point and the onset of the quark-had ron phase transition. The BES program covers a large part of the QCD phase diagram ($T$ vs.$mu_{B}$). With its uniform acceptance and excellent part icle identification\, STAR has collected large event samples in the $mu_{B }$ range 100-400 MeV. This makes it possible to study\, in addition to the energy dependence\, the centrality dependence of freeze-out parameters su ch as temperature\, baryon chemical potential\, and radial collectivity.\n \nWe present the first results on the centrality dependence of freeze-out parameters in Au+Au collisions at $\\sqrt{s_{NN}} =$ 7.7\, 11.5 and 39 GeV from the STAR experiment. The chemical freeze-out conditions are obtained by comparing the measured particle ratios at midrapidity (involving $\\pi ^{\\pm}$\, $K^{\\pm}$\, $K_{s}$\, $p(\\bar{p})$\, $\\phi$\, $\\Lambda$\, $ \\Xi$\, and $\\Omega$) to those from the statistical-thermal model calcula tions (THERMUS). We observe a clear centrality dependence in both $T$ and $mu_{B}$ values at the lower beam energies (11.5 and 7.7 GeV). Whereas no such dependence is observed for higher beam energies (200 - 62.4 GeV). The implications of including multi-strange hadrons and choosing different en sembles (Grand canonical versus Strangeness canonical) in THERMUS model on the $T$ and $mu_{B}$ values will be discussed. The kinetic freeze-out pa rameters are obtained by fitting the invariant yields of the produced part icles ($\\pi^{\\pm}$\, $K^{\\pm}$\, and $p(\\bar{p})$)\, as a function of transverse momentum\, to the Blast-Wave and Tsallis models. The kinetic fr eeze-out temperature and the radial collectivity which shows an anti-corre lation at all the energies studied will be presented.\n\nhttp://indico.cer n.ch/contributionDisplay.py?contribId=337&sessionId=24&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=337&sessionId=2 4&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Event anisotropy of electrons from charm and bottom quark decays i n 200 GeV Au+Au collisions at RHIC-PHENIX DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-336@cern.ch DESCRIPTION:Speakers: Dr. HACHIYA\, Takashi (RIKEN)\nThe production of hea vy quarks is a powerful tool for investigating\nthe dense partonic medium created in high energy heavy ion collisions.\nDue to their large masses\, heavy quarks are mainly produced \nat the initial stage of the collisions. \nTherefore the heavy quark probes is sensitive to the full time evolutio n \nof the heavy ion collision.\nThe PHENIX experiment measured the strong flow (v_2) of electrons \nfrom heavy quark decays. This indicates that th e heavy quarks \ninteracts with the medium more than it had been expected. \nHowever these measurements could not distinguish between charm \nand bot tom decays\, measuring instead an admixture of the two.\n\nWe installed th e silicon vertex tracker (VTX) in year 2011 as a \ndetector upgrade. The V TX was designed to provide a clear separation \nof the charm and bottom co ntributions by measuring electrons with \nthe distance of the closest appr oach to the primary vertex.\nIn this poster\, the analysis method will be described in detail and\nthe status of electron flow from separated charms and bottoms \nin Au+Au 200GeV collisions at RHIC-PHENIX will be presented and discussed.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId= 336&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=336&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Performance of the Muon Telescope Detector in STAR at RHIC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-331@cern.ch DESCRIPTION:Speakers: YANG\, Chi (U)\nA larger area of muon telescope dete ctor(MTD) at mid-rapidity will provide excellent muon identification and t rigger capabilities at mid-rapidity in the high-luminosity era at RHIC. Th is novel and compact detector can provide crucial measurements for many ex citing physics perspectives. We can measure different Upsilon states and J /psi over a broad transverse momentum range through di-muon decays to stud y color screening features. The measurment of e-muon correlations can dist inguish heavy flavor contributions from initial lepton pair production. Th e construction of the MTD at STAR has been started. In 2012\, about 10% of the full system have been installed in STAR and taken data smoothly. In t his poster\, we will report the performance of the MTD in 2012 including i ts trigger capabilities\,spatial\, and timing resolution. Physics capabili ties such as e-muon correlations will also be discussed.\n\nhttp://indico. cern.ch/contributionDisplay.py?contribId=331&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=331&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Strange hadrons at intermediate and high transverse momentum in p+ p\, d+Au\, Cu+Cu and Au+Au collisions at 200 GeV measured with PHENIX dete ctor DTSTART;VALUE=DATE-TIME:20120816T192000Z DTEND;VALUE=DATE-TIME:20120816T194000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-330@cern.ch DESCRIPTION:Speakers: Dr. SHUKLA\, Prashant (Bhabha Atomic Research Centre (IN))\nThe hadrons containing strange quark(s) are among the most interes ting probes of the hot and dense matter produced in heavy ion collisions a t Relativistic Heavy Ion Collider (RHIC). While p+p collisions are used as a baseline for comparison with heavier collision systems and provide a cr oss check for pQCD calculations\, d+Au collisions are used to study cold n uclear matter effects for mesons and baryons and their dependence on parti cle mass and flavor. Heavy ion collisions provide an insight into effects of quark recombination and jet quenching. Experimental measurements reveal if strange particles are suppressed at high transverse momentum ($p_T$) s imilarly to light hadrons and if the quark recombination mechanisms boosts strange hadron production at intermediate $p_T$. The PHENIX experiment pr ovides excellent capabilities to measure particles with strangeness conten t over a wide $p_T$ range using a combination of different analysis techni ques. \n In this talk we present the latest PHENIX result on production o f K$^\\pm$\, K$_s$\, K*\, $\\phi$ and $\\Lambda$ which considerably extend the $p_T$ range for p+p\, d+Au\, Cu+Cu and Au+Au collisions at \\sqrt{s_ {NN}} = 200 GeV. The nuclear modification factors are obtained for d+Au an d heavy ion collisions at different centralities. These systematic study a dvance the understanding of the strange meson and baryon production and t heir difference from light hadrons.\n\nhttp://indico.cern.ch/contributionD isplay.py?contribId=330&sessionId=17&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=330&sessionId=1 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Collective Flow of Charged Hadrons in Cu+Cu collisions at $\\sqrt{ s_{NN}}$ = 200 GeV at RHIC PHENIX DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-332@cern.ch DESCRIPTION:Speakers: REYNOLDS\, Damian (S)\nThe collective flow of charge d hadrons emitted in heavy ion collisions can be characterized using the F ourier coefficient $v_2$ (elliptic flow)\, as well as with the higher orde r coefficients\, $v_3$\, $v_4$\, etc\, which result primarily from fluctua tions in the initial conditions of the colliding nuclei.The latter is of p aramount importance since it can provide insight on the hydrodynamic behav ior of the medium\, as well as constraints for reliable extraction of tran sport coefficients. For example\, $v_3$ has been critical in discriminatin g between different models and the application of viscocity. In recent mea surements\, PHENIX has extracted $v_{2\,3\,4}$ coefficients for charged ha drons via two independent methods.\nThe first correlates the azimuthal dis tribution of particles at mid-rapidity in the central arm of PHENIX with e vent planes determined by the detectors widely spaced in pseudorapidity to avoid non-flow effects. \nThe second method is a two particle correlation between a charge weighted azimuthal angle in the Beam Beam Counters and t he azimuthal angle of a track in the central arms of the PHENIX detector. Again\, the pseudorapidity gap is present to avoid non-flow effects. This method has the added benefit of not requiring that the reaction plane angl e be determined. \nThese coefficients\, measured as a function of the numb er of particpating nucleons\, centrality\, and $p_T$ for charged hadrons\, will be presented and compared to earlier measurements for Au+Au collisio ns at the same energy so as to see the effect of system size.\n\nhttp://in dico.cern.ch/contributionDisplay.py?contribId=332&sessionId=37&confId=1810 55 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=332&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:HBT scaling results from UrQMD up to LHC energies DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-99@cern.ch DESCRIPTION:Speakers: GRÄF\, Gunnar (Frankfurt Institute for Advanced Stu dies)\nWe use the Ultra-relativistic Quantum Molecular Dynamics (UrQMD) to explore HBT/Femtoscopic correlation in proton-proton and heavy ion collis ions up to LHC energies. We discuss a) the scaling of HBT radii in proton- proton reactions at top LHC energies and b) the scaling of HBT radii from proton-proton to heavy-ion reactions from RHIC-BES to LHC energies for va rious systems.\n\n[1] G. Graef et al.\, J. Phys. G in print (2012)\n[2] Q. Li\, G. Graef\, M. Bleicher\, Phys. Rev. C 85\, 034908 (2012)\n[3] G. Gra ef et al.\, Phys. Rev. C 85\, 044901 (2012)\n\nhttp://indico.cern.ch/contr ibutionDisplay.py?contribId=99&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=99&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Identi fied charged hadron production at the LHC with the ALICE ex periment DTSTART;VALUE=DATE-TIME:20120816T180000Z DTEND;VALUE=DATE-TIME:20120816T182000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-98@cern.ch DESCRIPTION:Speakers: MILANO\, Leonardo (Universita e INFN (IT))\nIdentifi ed particle spectra are a basic observable to understand the behaviour of the matter created in high-energy heavy-ion collisions. The transverse mom entum distributions of identified hadrons contain informations about the t ransverse expansion of the system and constrain the freeze-out properties of the matter created. The ALICE experiment has very good particle identif ication capabilities over a broad pT-range. Particles are identified using the energy loss signal in the Inner Tracking System and Time Projection C hamber detectors\, complemented with the information from the Time of Flig ht detector to identify hadrons up to pT ∼ 5 GeV/c. In this contribution the results for identified pions\, kaons and protons in pp collisions at 0.9 and 7 TeV center-of-mass energy and heavy-ion collisions at 2.76 TeV c enter-of-mass energy will be presented. These results are compared with ot her identified particle measurements obtained by the ALICE experiment\, an d discussed in terms of the thermal and hydrodynamical pictures. The statu s of extensions of this analysis\, with the study of identified particles as a function of event-by-event flow in Pb-Pb collisions and as a function of multiplicity in pp collisions\, will also be discussed.\n\nhttp://indi co.cern.ch/contributionDisplay.py?contribId=98&sessionId=15&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=98&sessionId=15 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:phi-meson and Multi-Strange Hyperon Production at FAIR Energies fr om Transport Model in Heavy Ion Collision DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-91@cern.ch DESCRIPTION:Speakers: Mr. MUKESH KUMAR SHARMA\, Mukesh (University Of Jamm u)\nThe study of phi meson and multi-strange production in heavy ion colli sion are the most interesting observables for exploring the new phase of m atter named Quark Gluon Plasma. We will investigate the phi-meson and mult i-strange production at FAIR energies using transport models like Ultra Re lativistic Quantum Molecular Dynamics (UrQMD)[1] and A Multi Phase Transpo rt Model (AMPT)[2]. The UrQMD model is based on a microscopic transport th eory where there is phase space description of the reactions and resonance decays included. The AMPT is based on minijet formation. In this paper we present the measurement of elliptic flow (v2) of phi-meson and hyperon in Au-Au collisions at lab energies 10 GeV\,25GeV and 35 GeV.\n\nReferences\ n[1] S.A. Bass et al.\, Prog. Part. Nucl. Phys. 41 255 (1998).\n[2] Zi-Wei Lin et al.\, Phys. Rev. C 72\, 064901 (2005)\n\nhttp://indico.cern.ch/con tributionDisplay.py?contribId=91&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=91&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Density fluctuations at the QCD phase transition DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-90@cern.ch DESCRIPTION:Speakers: HEROLD\, Christoph ()\nWe study the nonequilibrium d ynamics of a quark fluid coupled to a sigma field and a Polyakov loop near the QCD phase boundary. As the system evolves through the first order tra nsition line\, baryon density fluctuations are enhanced in comparison with an evolution through the crossover or the critical point.\n\nhttp://indic o.cern.ch/contributionDisplay.py?contribId=90&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=90&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Multigluon correlations in the color glass condensate DTSTART;VALUE=DATE-TIME:20120815T150000Z DTEND;VALUE=DATE-TIME:20120815T152000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-93@cern.ch DESCRIPTION:Speakers: LAPPI\, Tuomas (U)\nMultiparticle correlations\, suc h as the "ridge" effect in pp and AA collisions and forward dihadron corre lations in pA collisions\, are an important probe of the strong color fiel ds that dominate the initial stages of a heavy ion collision. We argue tha t the Color Glass Condensate framework provides the most natural way to un derstand them.\n\nWe describe recent progress in understanding two-particl e correlations in the dilute-dense system\, e.g. in forward dihadron pro duction in deuteron-gold collisions. This requires computing the energy d ependence of higher point Wilson line correlators from the JIMWLK renorma lization group equation. We find that the large Nc approximation used so f ar in the phenomenological literature is not very accurate. On the other h and a Gaussian finite Nc approximation is a surprisingly close to the full result.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=93&sess ionId=54&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=93&sessionId=54 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Azimuthal angle correlations in forward dihadron production in pA collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-92@cern.ch DESCRIPTION:Speakers: MÄNTYSAARI\, Heikki (University of Jyväskylä\, De partment of Physics)\nSingle inclusive hadron production in the forward ra pidiy region in \ndeuteron-gold collisions is well understood in the Color Glass Condensate (CGC) framework. As a complement to single inclusive spe ctra\, detailed information is obtained with two-particle correlations. Re cent measurements of the azimuthal angle correlations at RHIC have shown t hat there is a strong suppression of the away side peak at forward rapidit ies. This is easily understood in the CGC framework: the produced partons are initially back-to-back in the transverse plane\, but the interaction w ith the nucleus causes a momentum transfer of the order of the saturation scale. In forward dihadron production the small-x structure of the nucleus is probed\, implying a large saturation scale.\n\nWe present on going wor k on calculating the dihadron correlation using the running coupling BK eq uation. We include the inelastic terms neglected in some of the previous l iterature and show that they naturally contain the double parton scatterin g part that has so far been treated as a separate contribution. We also us e\, for the first time in a phenomenological application\, a Gaussian appr oximation of JIMWLK to go beyond the large-Nc limit.\n\nhttp://indico.cern .ch/contributionDisplay.py?contribId=92&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=92&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Search for critical fluctuations in the proton transverse momenta for A+A collisions at the NA49 experiment (SPS\, CERN) DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-95@cern.ch DESCRIPTION:Speakers: Prof. DIAKONOS\, Fotis (University of Athens\, Physi cs Department\, Section of Nuclear and Elementary Particle Physics\, GR-15 771)\, DAVIS\, Nikolaos (University of Athens (GR))\nWe perform factorial moment analysis in the transverse \nmomentum space of protons produced at midrapidity in A+A collisions at the NA49 experiment (SPS\, CERN). After b ackground subtraction we find power-law dependence of the correlator on th e number of phase space cells for the systems Si+Si and Pb+Pb at 158A GeV with large values of the associated characteristic\nexponent (intermittenc y index). This behaviour is expected to occur when approaching the chiral critical endpoint of hadronic matter. Especially for the Si+Si system the measured intermittency index approaches in size the predictions of critica l QCD. The intermittency effect is suppressed in Pb+Pb collisions at 40A G eV. The results of our analysis indicate that the value of the critical ba ryochemical potential should be closer to 240 MeV than to 380 MeV.\n\nhttp ://indico.cern.ch/contributionDisplay.py?contribId=95&sessionId=37&confId= 181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=95&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Collision energy dependence of high transverse momentum $R_{CP}$ o f charged hadrons in STAR DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-94@cern.ch DESCRIPTION:Speakers: HORVAT\, Stephen (Y)\nThe observed suppression of hi gh transverse momentum ($p_{T}$) hadrons in central Au+Au collisions at $\ \sqrt{s_{NN}}$ = 200GeV\, expressed via the nuclear modification factor $R _{AA}$ ($R_{CP}$)\, is a clear indication of partonic energy loss due to t he strongly-coupled medium created in heavy-ion collisions. That result is supported by high-$p_{T}$ triggered azimuthal di-hadron correlations whic h compare the measured correlated yield of recoil jets in heavy-ion collis ions to p+p or peripheral collision reference measurements. The collision energy dependence of jet quenching measurements can be used to put further constraints on theoretical descriptions of partonic energy loss. We will present measurements of charged hadron $R_{CP}$ over a wide range of colli sion energies ranging from 7.7-200 GeV. In addition\, we will present the analysis status of triggered di-hadron correlations at lower RHIC energies .\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=94&sessionId=3 7&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=94&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Propagating fluctuations in fluid dynamic fields DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-97@cern.ch DESCRIPTION:Speakers: WIEDEMANN\, Urs (CERN)\nWe formulate the propagation of fluid dynamic fields as a propagation of small perturbations around sm ooth average fluid fields. Fluid dynamic simulations of smooth average ini tial conditions are then shown to be sufficient to map out the large space of fluid dynamic event histories resulting from arbitrary small fluctuati ons around these smooth initial conditions. We argue that this provides an efficient way for organizing event-by-event fluid dynamic simulations of heavy ion collisions\, and we present details and applications of the appr oach. \n\nBased on: Stefan Florchinger and U.A. Wiedemann\, work in prepar ation\n and JHEP 1111 (2011) 100\n\nhttp://indico.cern.ch/c ontributionDisplay.py?contribId=97&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=97&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Midrapidity antibaryon-to-baryon ratios in pp and Pb-Pb collisions measured by the ALICE experiment DTSTART;VALUE=DATE-TIME:20120815T160000Z DTEND;VALUE=DATE-TIME:20120815T162000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-96@cern.ch DESCRIPTION:Speakers: BROZ\, Michal (Comenius University (SK))\nThe ALICE Experiment features low material budget and high resolution tracking\, wh ich allow for precise measurements of charged particle production.\nThe me asurement of the antibaryon to baryon ratios ($\\bar{B}$/B)\, in particula r\, probes the baryon transport and the degree of baryon stopping in high energy collisions\, providing insight into the collision dynamics and the structure of baryons. In this talk\, we discuss the measurement of diferen t $\\bar{B}$/B ratios ($\\bar{p}/p\, $\\bar{\\lambda}/\\lambda$\, $\\xi^+/ \\xi^-$\, $\\omega^+/\\omega^-$) in pp collisions at \\sqrt{s} = 0.9\, 2.7 6\, and 7 TeV and in Pb-Pb collisions at \\sqrt{s_{NN}} = 2.76 TeV\, as a function of charged particle multiplicity\, rapidity and transverse moment um. Results from pp and Pb-Pb collisions are presented and compared to mod els.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=96&sessionI d=51&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=96&sessionId=51 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Dijet Correlations in the Forward pA (eA) Collisions to Map the Ph ase Structure of Cold Nuclei Matter at Small-x DTSTART;VALUE=DATE-TIME:20120817T192000Z DTEND;VALUE=DATE-TIME:20120817T194000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-559@cern.ch DESCRIPTION:Speakers: YUAN\, Feng (LBNL)\nAs the foundation of high energy hadronic physics\, QCD factorization enables us to separate the short dis tance perturbative physics from the long distance non-perturbative effects . Its prediction power relies on the universality of the parton distributi ons among different processes. In our recent publication [1]\, we establis hed an effective factorization in hard processes in nuclei scattered by a dilute probe. This factorization enables us to identify the key observable s to probe the so-called unintegrated gluon distributions\, the central ob jects in the saturation framework. This has been a long-standing issue in small-x physics. From our studies\, we found that the dijet-correlations i n deep inelastic scattering of electron-nucleus collisions directly measur e the Weizacker-Williams gluon distribution function\, whereas the photon- jet correlation in nucleon-nucleus (pA) collisions probes the dipole gluon distribution. The dijet (di-hadron) correlations in pA collisions can pro be both gluon distributions. Current experiments in deuteron-gold (dAu) co llisions at RHIC\, and future pA collisions at LHC\, and the planed electr on-ion collider (EIC) experiments\, will provide great opportunities to st udy two-particle collisions and the associated strong interaction dynamics of the gluon distributions in cold nucleus at small-x. \n\nRecently\, bot h STAR and PHENIX collaborations have reported the measurements of two-had ron correlations in the forward direction of dAu collisions at RHIC [2]\, where the strong de-correlation of the away-side hadron have been consider ed as the best evidence for saturation physics. The numeric calculations b ased on our factorization formalism provides a quantitative and thorough d escription of the experimental data in the saturation formalism [3]\, incl uding the large broadening of the angular distribution and suppression of the peak for the away-side hadron. The disappearing of the away-side peak in central collisions indicates that the saturation scale is the same orde r as the hard jet transverse momentum\, which is a clear signal of the ons et of the saturation. From the kinematics\, we conclude that the saturatio n scale reaches 2GeV at x~6x10-4 in the center of the gold nucleus with je t transverse momentum kt~3GeV at rapidity 3.2. Future measurements at RHIC and LHC and the planed EIC will provide more information and help to map out the complete phase structure of the cold nuclei matter at small-x. \n\ n[1] F. Dominguez\, B. Xiao and F. Yuan\, kt-factorization for Hard Proces ses in Nuclei\, Phys. Rev. Lett. 106\, 022301 (2011)\; F. Dominguez\, C. M arquet\, B.W. Xiao and F. Yuan\,\n Universality of Unintegrated Gluon Dist ributions at small x\, Phys. Rev. D83\, 105005 (2011).\n[2] E. Braidot\, f or the STAR Collaboration\, Two Particle Correlations at Forward Rapidity in STAR\, Nucl. Phys. A 854\, 168 (2011)\; A. Adare\, et al.\, [PHENIX Col laboration]\, Suppression of back-to-back hadron pairs at forward rapidity in d+Au Collisions at \\sqrt{s}_{NN}}=200GeV\, Phys. Rev. Lett. 107\, 172 301 (2011). \n[3] A. Stasto\, B. Xiao\, F. Yuan\, Back-to-Back Correlation s of Di-hadrons in dAu Collisions at RHIC\, e-Print: arXiv:1109.1817 [hep- ph].\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=559&session Id=36&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=559&sessionId=3 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Cold quark matter in astrophysics of compact stars DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-554@cern.ch DESCRIPTION:Speakers: Dr. SEDRAKIAN\, Armen (Frankfurt University)\nI disc uss the structure and composition of massive (two solar-mass) neutron star s containing deconfined quark matter in color superconducting states. Stab le configurations featuring such matter are obtained if the equation of st ate of hadronic matter is stiff above the saturation density\, the transit ion to quark matter takes place at a few times the nuclear saturation dens ity\, and the repulsive vector interactions in quark matter are substantia l. I also discuss our recent progress in understanding the cooling of mass ive compact stars with color superconducting quark cores.\n\nhttp://indico .cern.ch/contributionDisplay.py?contribId=554&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=554&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Higher moments of net-charge multiplicity distributions at RHIC en ergies from STAR DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-557@cern.ch DESCRIPTION:Speakers: SAHOO\, NIHAR R (Variable Energy Cyclotron Centre)\n To prob e the critical p oint (CP) of QCD phase transition\, the Relativis tic Heavy-Ion Collider (RHIC) at Brookhaven National Laboratory has\nunder taken the beam energy scan program\, colliding high energy heavy-ions\ncor responding to baryonic chemical potentials within the range of 20 - 550\nM eV. QCD based model calculations reveal that the correlation length of the \nsystem diverges at the CP. The higher order moments (such as standard de viation ($\\sigma$)\, skewness (S) and kurtosis ($\\kappa$)) of the net-ch arge\, net-baryon and\nnet-strangeness multiplicity distributions are rela ted to the corresponding\nhigher order susceptibilities and also to the co rrelation length of the system.\nThe non-monotonic behavior of these highe r moments as a function of colliding energy could be considered as a signa l of the CP.\n\n The STAR experiment has taken data for Au+Au collisions at 200 GeV\,\n62.4 GeV\, 39 GeV\, 27 GeV\, 19.6 GeV\, 11.5 GeV and 7.7 Ge V center of\nmass energies. Here we report the mid-rapidity measurement of the higher\norder moments of the net-charge multiplicity distribution usi ng the STAR\ntime projection chamber detector for above beam energies. The energy and\ncentrality dependence of higher moments and their products (s uch as $\\frac{\\sigma^{2}}{M}\, S$\\sigma$ and $\\kappa\\sigma^{2}$) will be presented. The data will also be compared to Poisson expectations and Hadron Resonance Gas model calculations\n\nhttp://indico.cern.ch/contribut ionDisplay.py?contribId=557&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=557&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Relativistic Fluctuating Hydrodynamics and its Application to Heav y Ion Collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-556@cern.ch DESCRIPTION:Speakers: MURASE\, Koichi (The University of Tokyo)\nTo invest igate the physics of the strongly interacting system of quarks\nand gluons under extreme conditions\, heavy-ion collision experiments are\nperformed at Large Hadron Collider (LHC) and Relativistic Heavy Ion\nCollider (RHIC ). One of the major discoveries was that elliptic flow v_2\nwas comparable with an ideal hydrodynamic prediction and\, as a result\,\nthat a new par adigm of strongly coupled quark-gluon plasma (QGP) was\nestablished. Recen tly\, the higher harmonics v_n (n > 2) are\nsystematically observed at RHI C and LHC and attract a lot of theoretical\nand experimental interests. In itial state fluctuations turned out to be\nimportant to explain these high er harmonics.\n\nIn addition to initial state fluctuations\, thermal fluct uation during\nthe space-time evolution of the QGP also plays an important role in\nevent-by-event simulations. We first formulate the relativistic\ nfluctuating hydrodynamics in the context of the second order causal\ntheo ry. Finite relaxation time for dissipative current is required to\nmake hy drodynamic equation consistent with causality. Instead of\nintroducing the relaxation term itself\, one can define a kernel function\n(or a retarded Green function) such that constitutive equation becomes\nconvolution of t he kernel function including relaxation as well as\ndissipation and the co rresponding thermodynamic force. One can also\nintroduce a noise field as thermal fluctuation of the dissipative\ncurrent like in the Langevin equat ion. Thus the constitutive equation\nbecomes no longer a deterministic equ ation\, but a stochastic equation.\nThe power spectrum of the noise fields is intimately related to the\nkernel function via the fluctuation-dissipa tion relation and\,\nconsequently\, noise becomes colored noise rather tha n white one due to\nthe finite relaxation time. We then implement the colo red noise together\nwith viscous kernels in numerical simulations of relat ivistic\nhydrodynamics and perform simulations on an event-by-event basis to see\neffects of thermal fluctuation on the dynamics of heavy ion collis ions.\nThis framework is beyond the conventional second order dissipative\ nhydrodynamics and\, thus\, will become important in the upcoming era of\n the precision QGP physics by means of high-energy heavy ion collisions.\n\ nhttp://indico.cern.ch/contributionDisplay.py?contribId=556&sessionId=37&c onfId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=556&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Shocks in Quark-Gluon Plasma DTSTART;VALUE=DATE-TIME:20120814T181500Z DTEND;VALUE=DATE-TIME:20120814T183500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-551@cern.ch DESCRIPTION:Speakers: SHURYAK\, Edward (stony brook university)\nLarge ene rgy deposition from LHC quenching jets restarted interest\nto shock format ion. Shocks also have theoretical significance as\nthe simplest out-of-equ ilibrium setting without time dependence.\nWhile weak shocks have small gr adients and can be\ntreated hydrodynamically in the Navier-Stokes (NS) app roximation\, \nthe ones without a small parameter (strong shocks) needs ot her methods.\nTwo of those will be applied: (i) the ``resummed hydrodynami cs" proposed\nearlier by Lublinsky and myself\; and (ii) AdS/CFT correspon dence\, which\nuses the modified Einstein equations. In the latter case we apply \nnovel variational approach and find approximate solution good to within\nfraction of a percent. The conclusion from both treatments is that the\nstrong shocks deviate from NS only be few percent\, in the direction \nof thinner shocks. We also discuss how shock formation shoulc modify the \npredictions for jet-hadron and hard hadron-hadron correlators.\n\nhttp:/ /indico.cern.ch/contributionDisplay.py?contribId=551&sessionId=2&confId=18 1055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=551&sessionId=2 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Transverse momentum fluctuations in event-by-event viscous hydrody namics DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-550@cern.ch DESCRIPTION:Speakers: BOZEK\, Piotr ()\nResults of event-by-event simulati ons of a 3+1D viscous hydrodynamic\nmodel for Au-Au collisions at 200 GeV are presented. The fluctuations of the average transverse momentum in an e vent are determined by the \nfluctuations of the initial transverse size o f the fireball. The mechanism involving transverse-momentum fluctuations f rom the initial size fluctuations\, transmitted to the final statistical-h adronization phase with hydrodynamics\, is capable of easily reproducing t he magnitude of the effect and explains the basic features of the data. Th e momentum fluctuations present a complimentary information about the coll ective expansion of the fireball to the widely discussed harmonic flow coe fficients. The scaled transverse momentum fluctuations are not changed sig nificantly when modifying the viscosity or the freeze-out temperature.\n\n P. Bozek\, W. Broniowski\, Phys. Rev. C85\, 044910 (2012)\n\nhttp://indico .cern.ch/contributionDisplay.py?contribId=550&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=550&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Magnetic plasma and unusual confinmenets DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-553@cern.ch DESCRIPTION:Speakers: SHURYAK\, Edward (stony brook university)\nConfineme nt phenomenon for a long time was associated with\nBose-Einstein condensat ion (BEC) of cirtain magnetic objects.\nIn a series of previous works we h ad shown that it is indeed the\ncase for lattice monopoles\, which in pure gauge theory are about\nas numeroous near $T_c$ as gluons. We can now sho w that with\nincreasing number of quark flavors to $N_f\\sim 10$ the decon finement\ntransition moves to much stronger coupling\, and thus magnetic\n monopoles will dominate electric excitations. We will also speculate\nthat ``unusual" magnetic objects can undergo BEC\, as they known to\ndo so in supersymmetric analogs of multi-flavor QCD.\n\nhttp://indico.cern.ch/contr ibutionDisplay.py?contribId=553&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=553&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Chiral symmetry breaking in QCD and related theories DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-552@cern.ch DESCRIPTION:Speakers: SHURYAK\, Edward (stony brook university)\nFor about a decade it is known that topological fluctuations -- instantons \n-- are modified by the nonzero Polyakov line VEV and split into Nc dyons.\nBy no w there is extensive lattice literature confirming this fact and \nexplain ing certain observations by properties of such dyons\, mostly at T=(1-2)Tc . \nThis talk report the first direct simulations of the statistical mecha nics\nof the ``dyonic vacuum"\, using one-loop partition function. We foun d\nthat chiral symmetry breaking and Dirac eigenvalues spectra are strongl y\naffected by the LLbar dyon clustering. Among many consequences explaini ng\nlattice data is the dependence on the chiral transition on the \nnumbe r of fermion species Nf and the fermionic periodicity condition.\n\nhttp:/ /indico.cern.ch/contributionDisplay.py?contribId=552&sessionId=37&confId=1 81055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=552&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Spectra and flow of thermal and non-thermal photons at highest col lider energies DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-238@cern.ch DESCRIPTION:Speakers: BÄUCHLE\, Björn (FIAS Frankfurt)\nPhotons\, as all electromagnetic probes\, can give direct access to the hot and dense phas e of a heavy-ion reaction. We show calculations of direct photon emission at highest energies available with the UrQMD-hybrid model. UrQMD is a full microscopic+macroscopic transport/fluiddynamics hybrid model with hadron- and string-driven equilibration phase\, a fll (3+1)-dimensional fluiddyna mic hot and dense phase and a hadronic after-burner. Unequilibrated matter at high rapidity is preserved during the fluid phase. A strong emphasis is set on the impact of viscosity and Equation of State at zero and non-ze ro band string aryon density to the spectra and flow patterns of thermal a nd non-thermal photons in A+A-collisions at RHIC\, LHC.\n\nhttp://indico.c ern.ch/contributionDisplay.py?contribId=238&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=238&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:QCD Critical Point : Marching towards continuum DTSTART;VALUE=DATE-TIME:20120817T182000Z DTEND;VALUE=DATE-TIME:20120817T184000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-239@cern.ch DESCRIPTION:Speakers: GAVAI\, Rajiv V (Tata Institute\, Mumbai\, India)\nW e simulate QCD with two light dynamical quarks on a 32^3 X 8 lattice by\nt uning the current quark mass such that the Goldstone pion mass is about\n2 30 MeV. Earlier results of our Mumbai group corresponded to the same phy sical parameters but were on coarser lattices at respectively 1.33 times a nd twice the lattice cut-off (a) compared to these simulations\, thus perm itting us a march towards the continuum limit. Employing the\nTaylor exp ansion method we had proposed earlier to estimate the radius of convergenc e of the series for the baryonic susceptibility\, and using\nup to eight o rder terms\, we attempt to zoom in on the QCD critical point\n\nhttp://ind ico.cern.ch/contributionDisplay.py?contribId=239&sessionId=24&confId=18105 5 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=239&sessionId=2 4&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Studies of the nuclear stopping power in PbPb collisions at 2.76 T eV with CMS DTSTART;VALUE=DATE-TIME:20120815T123000Z DTEND;VALUE=DATE-TIME:20120815T125000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-235@cern.ch DESCRIPTION:Speakers: WOHRMANN\, Clemens (KIT - Karlsruhe Institute of Te chnology (DE))\nThe energy flow at very high pseudorapidity in PbPb collis ions is sensitive to the very low-x components of the nuclear wave-functio n. The CASTOR calorimeter extends the pseudorapidity coverage of CMS to -6 .6\, which is only 1.4 units away from the beam rapidity. A comparison of the centrality dependence of forward energy flow to that at lower pseudora pidities can shed light on the gluon saturation at low-x. This problem can also be approached by a direct comparison of PbPb and pp energy flow in t he forward region. This analysis is based on data taken in 2010. The energ y flow in the pseudorapidity range of -5.2 to -6.6 has been measured for 2 .76 TeV PbPb collisions over a wide range of centrality and also for miniu m bias pp collisions. These data are compared to energy-flow measurements for pseudorapidities between -5.2 and +5.2. The very large angular coverag e of the CMS detector allows for a test of limiting fragmentation of energ y flow\, and for an estimate of nuclear stopping. Finally\, these data are compared to predictions of hydrodynamic models and microscopic event gene rators.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=235&sess ionId=12&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=235&sessionId=1 2&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Photoproduction of heavy vector mesons in ultra-peripheral PbPb co llisions at center-of-mass energy of 2.76 TeV in CMS DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-236@cern.ch DESCRIPTION:Speakers: KENNY\, Pat (University of Kansas (US))\nUltra-perip heral collisions (UPCs) of heavy ions involve long range electromagnetic i nteractions at impact parameters larger than twice the nuclear radius. At TeV energies\, the strong electromagnetic field due to the coherent action of the Z=82 proton charges generates a large flux of photons\, which can be used for high-energy photoproduction studies. Heavy vector mesons (for example J/psi\, Psi'\, Upsilon) produced in electromagnetic interactions p rovide direct information on the parton distribution functions in the nucl eus at very low values of Bjorken-x. These events are characterized by a v ery low hadron multiplicity. The wide pseudorapidity coverage of the CMS d etectors is used to separate such events from very peripheral nuclear inte ractions. The CMS experiment has excellent capabilities for the measuremen t of the heavy vector mesons in the di-muon decay channel using the tracke r and the muon chambers. This analysis is based on the full 2011 PbPb data set of 150/ub. Ultra-peripheral events where one nucleus breaks up are ta gged by forward neutrons detected in the Zero Degree Calorimeters. In this talk ratios of Psi' to J/psi\, and the yields of J/psi and Psi' per UPC e vent with nuclear breakup will be presented and compared to theoretical pr edictions.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=236&s essionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=236&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Jet pT spectra at high pT in PbPb collisions at a center-of-mass e nergy of 2.76 TeV with CMS DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-237@cern.ch DESCRIPTION:Speakers: LU\, Ying (University of Maryland (US))\nThe poster presents the jet response and inclusive pT spectra of jets reconstructed i n PbPb collisions with the CMS detector at a center-of-mass energy of 2.76 TeV. The jets are found and reconstructed using both the calorimeters and the tracker system\, through iterative cone and anti-kT algorithms\, sepa rately. The high-pT jet triggers and their efficiencies are studied for bo th PbPb and pp collisions at a center-of-mass energy of 2.76 TeV. Differen t unfolding methods are employed to obtain the true distribution of the ob servables utilizing PYTHIA+HYDJET Monte Carlo Simulation samples.\n\nhttp: //indico.cern.ch/contributionDisplay.py?contribId=237&sessionId=37&confId= 181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=237&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Elliptic azimuthal anisotropy of neutral pions in PbPb collisions at 2.76 TeV with CMS DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-230@cern.ch DESCRIPTION:Speakers: SHARMA\, Monika (Vanderbilt University (US))\nThe fi rst measurements of the elliptic azimuthal anisotropy of neutral pions\, p i0s\, produced in 2.76 TeV PbPb collisions will be presented. The results are based on data collected by the CMS experiment during the 2010 LHC runn ing period. The amplitudes of the second Fourier component (v2) of the pi0 azimuthal distributions are extracted using an event-plane technique. The values of v2 are studied as a function of the neutral pion transverse mom entum (pT) for different centrality classes in the kinematic range pT = 1. 6 - 8 GeV/c\, and |eta|\n\nhttp://indico.cern.ch/contributionDisplay.py?co ntribId=230&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=230&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Suppression of open bottom at high pT via non-prompt J/psi decays in PbPb collisions at 2.76 TeV with CMS DTSTART;VALUE=DATE-TIME:20120817T194000Z DTEND;VALUE=DATE-TIME:20120817T200000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-231@cern.ch DESCRIPTION:Speakers: JO\, Mihee (Korea University (KR))\nMeasurements of the nuclear modification factor of mesons with open heavy flavor content i n PbPb collisions at sqrt(sNN) = 2.76 TeV from the CMS experiment will be presented. These modification factors provide stringent constraints on the theoretical models of heavy quark energy loss. Until recently only indire ct measurements of this effect existed\, through single electrons from sem ileptonic open heavy-flavor decays. The importance of an unambiguous measu rement of open bottom flavor is driven by the lack of knowledge regarding key features of the dynamics of parton energy loss in the QGP\, such as it s color-charge and parton-mass dependencies and the relative role of radia tive and collisional energy loss. CMS is the first\, and so far only\, exp eriment to measure the nuclear modification factor of B hadrons\, identifi ed via their decays into J/psi displaced from the primary collision vertex . First results have shown that B hadrons are strongly suppressed in PbPb collisions at a level comparable to open charm. New results on the central ity dependence of RAA and the first measurement of the azimuthal anisotrop y of non-prompt J/psi will be presented\, based on the full 2011 PbPb data sample corresponding to an integrated luminosity of 150/ub.\n\nhttp://ind ico.cern.ch/contributionDisplay.py?contribId=231&sessionId=23&confId=18105 5 LOCATION: Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=231&sessionId=2 3&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Detailed measurements of bottomonium suppression in PbPb collision s at 2.76 TeV with CMS DTSTART;VALUE=DATE-TIME:20120814T204500Z DTEND;VALUE=DATE-TIME:20120814T210500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-232@cern.ch DESCRIPTION:Speakers: BRETO RANGEL\, Guillermo (University of California D avis (US))\nThe three Y states (1S\, 2S\, 3S) can be separated using the C MS experimental apparatus via their dimuon decays in both pp and heavy-ion collisions. A suppression of the Y(1S) and Y(2S) mesons is observed in Pb Pb collisions at sqrt(sNN) = 2.76 TeV\, compared to the yield in pp collis ions scaled by the number of inelastic nucleon-nucleon collisions. Further more\, a suppression of the excited Y states has been measured with respec t to the Y(1S) state\, expressed as a double ratio [Y(2S+3S)/Y(1S)]{PbPb} / [Y(2S+3S)/Y(1S)]{pp}. The centrality dependence of the double ratio\, as well as the nuclear modification factors (RAA) of the Y(1S) and Y(2S) sta tes will be presented as a function of collision centrality\, based on the analysis of the full data sample collected during the 2011 PbPb run\, whi ch corresponds to an integrated luminosity of 150/ub.\n\nhttp://indico.cer n.ch/contributionDisplay.py?contribId=232&sessionId=50&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=232&sessionId=5 0&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Z and W boson production in PbPb collisions at 2.76 TeV with CMS DTSTART;VALUE=DATE-TIME:20120815T160000Z DTEND;VALUE=DATE-TIME:20120815T162000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-233@cern.ch DESCRIPTION:Speakers: BENHABIB\, Lamia (Ecole Polytechnique (FR))\nThe Com pact Muon Solenoid (CMS) is fully equipped to measure leptonic decays of e lectroweak probes in the high multiplicity environment of nucleus-nucleus collisions. Electroweak boson production is an important benchmark process at hadron colliders. Precise measurements of W and Z production in heavy- ion collisions can help to constrain nuclear PDFs as well as serve as a st andard candle of the initial state in PbPb collisions at the LHC energies. The inclusive and differential measurements of the Z boson yield in the m uon decay channel will be presented\, establishing that no modification is observed with respect to next-to-leading order pQCD calculations\, scaled by the number of incoherent nucleon-nucleon collisions. Measurements of t he yield of W to $\\mu \\nu$ decays as a function of centrality and the W charge asymmetry as a function of rapidity show no modifications beyond th e expected effect of isospin when compared to pp collisions.\n\nhttp://ind ico.cern.ch/contributionDisplay.py?contribId=233&sessionId=53&confId=18105 5 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=233&sessionId=5 3&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Construction of LMRPC modules for STAR-MTD DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-1@cern.ch DESCRIPTION:Speakers: WANG\, Yi (Department of Engineering Physics\, Tsing hua University)\nData taken over the last several years have demonstrated that the Relative Heavy Ion Collider (RHIC) has created dense and rapidly thermalizing matter. The next objective at RHIC is to study properties of this partonic matter in detail in terms of color degrees of freedom and th e equation of state. The precise measurement of transverse momentum distri butions of quarkonia at different centralities\, collision systems\, and e nergies will serve as a thermometer of QGP. A large-area and cost-effectiv e Muon Telescope Detector (MTD) at mid-rapidity for the STAR was proposed. The MTD will be constructed with LMRPC instead of small pad read-out MRPC . With this design the number of electronic channels can be reduced effect ively and the hit position along the strip can be obtained by the time dif ferences of two ends of the strips.\n A prototype of Long-strip Multi-gap Resistive Plate Chamber (LMRPC) for STAR-MTD has been developed. This 5-ga p prototype has an active area of 52x87 cm2 and the signals are read out f rom 12 strips\, which are 3.8cm wide and 87cm long. The 5-gap STAR-MTD LMR PC module has a efficiency up to 98% and time resolution is in the order o f 95 ps. The noise level of such modules is quite low. A special machine w as developed to make the colloidal graphite electrodes. Using the time dif ference of the two PMT signals of each of the two long scintillators\, a s election of perpendicular cosmic-ray particles is done to get a better tim e resolution evaluation. 22 LMRPC modules we have been built all passed QC and they have very good performance. The whole MTD consists of 117 LMRPCs and 60 modules will be produced in Tsinghua university. In this paper\, t he performance of the prototype\, cosmic test facility and production stat us are described.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribI d=1&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=1&sessionId=37& confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Comprehensive Analysis of in-Medium Quarkonia from SPS to LHC DTSTART;VALUE=DATE-TIME:20120814T195500Z DTEND;VALUE=DATE-TIME:20120814T201500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-146@cern.ch DESCRIPTION:Speakers: RAPP\, Ralf (Texas A&M University)\nWe employ a kine tic rate-equation approach in a thermally expanding medium to compute the suppression and regeneration of quarkonia in heavy-ion collisions [1]. Th e in-medium properties of quarkonia figuring into the rate equation (width s\, binding energies and heavy-quark masses) are constrained by euclidean correlators from lattice QCD. Input cross sections for heavy quarks and qu arkonia\, as well as cold nuclear matter effects\, are constrained by pp a nd pA/dA data as available. Formation-time effects and bottom feeddown\, m ostly relevant at high transverse momentum (p_t)\, are accounted for. The thermal relaxation time of heavy quarks\, controlling the regeneration con tribution\, is adjusted to central AA data at SPS and RHIC. The approach i s applied to pre- and postdict charmonium [1\,2] and bottomonium [3] produ ction as a function of centrality\, p_t\, rapidity\, and collision energy in comparison to data from NA50\, PHENIX\, STAR\, ALICE\, CMS and ATLAS. S ystematic trends and areas of potential disagreement are identified.\n\n[1 ] X. Zhao and R. Rapp\, Phys. Rev. C82 (2010) 064905.\n[2] X. Zhao and R. Rapp\, Nucl. Phys. A859 (2011) 114.\n[3] A. Emerick\, X. Zhao and R. Rapp\ , Eur. Phys. J. A (2012) in press.\n\nhttp://indico.cern.ch/contributionDi splay.py?contribId=146&sessionId=5&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=146&sessionId=5 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Heavy Flavour Electron azimuthal anisotropy $v_2$ from 2- and 4-pa rticle correlations in Au+Au collisions at $\\sqrt{s_{\\rm NN}} = $ 200\, 62 and 39 GeV at STAR DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-144@cern.ch DESCRIPTION:Speakers: Dr. KIKOLA\, Daniel (Purdue University)\nHeavy quark s (charm and bottom) are produced early in the collisions and therefore ar e important probes of the hot and dense matter created in the reactions at RHIC energies. Electrons from semileptonic decays of heavy flavour mesons (so called non-photonic electrons\, NPE) are the most feasible tool so fa r for studying heavy quarks in-medium interactions. NPE azimuthal anisotro py\, $v_2$\, is of particular interest because it provides additional mean s to discriminate between models which describe heavy quark\nin-medium int eractions. \n\nIn this presentation we will report the $v_2$ measurements using 2- and 4-particle correlations\, $v_2\\lbrace2\\rbrace$ and $v_2\\l brace4\\rbrace$\, at $\\sqrt{s_{\\rm NN}} = $ 200\, 62 and 39 GeV at STAR. Non-photonic electrons in this study are identified using three main STAR subsystems: Time Projection Chamber\, Time of Flight Detector and Barrel Electromagnetic Calorimeter. $v_2\\lbrace2\\rbrace$ and $v_2\\lbrace4\\rbr ace$ have different sensitivity to the flow fluctuations and so called non flow (correlations not related to the reaction plane) - there is a positiv e contribution of fluctuation and nonflow to the $v_2\\lbrace2\\rbrace$ wh ile\, in the case of $v_2\\lbrace4\\rbrace$\, nonflow is negligible and th e effect of fluctuations is negative. Therefore $v_2\\lbrace2\\rbrace$ and $v_2\\lbrace4\\rbrace$ provide an upper and lower limit on the average a zimuthal anisotropy of non-photonic electrons. Moreover\, bottom/charm pro duction ratio at lower energies is expected to be reduced compared to $\\s qrt{s_{\\rm NN}} = $ 200 GeV\, therefore low $p_T$ NPE azimuthal anisotrop y at $\\sqrt{s_{\\rm NN}} = $ 62 and 39 GeV would reflect charm $v_2$ bett er than at $\\sqrt{s_{\\rm NN}} = $ 200 GeV.\n\nhttp://indico.cern.ch/cont ributionDisplay.py?contribId=144&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=144&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Opening Keynote Address DTSTART;VALUE=DATE-TIME:20120813T130000Z DTEND;VALUE=DATE-TIME:20120813T133000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-619@cern.ch DESCRIPTION:Speakers: GORDON\, Bart ()\nhttp://indico.cern.ch/contribution Display.py?contribId=619&sessionId=46&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=619&sessionId=4 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:STAR Upgrade Plan for the Coming Decade DTSTART;VALUE=DATE-TIME:20120817T180000Z DTEND;VALUE=DATE-TIME:20120817T182000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-142@cern.ch DESCRIPTION:Speakers: Prof. HUANG\, Huan (UCLA\, For the STAR Collaboratio n)\nThe STAR Collaboration is scheduled to complete the Heavy Flavor Track er (HFT) and the Muon Telescope Detector (MTD) upgrades by 2014. These det ectors will greatly enhance the STAR physics capability to measure heavy q uark collectivity and correlations using topologically reconstructed charm hadrons and heavy quark decay e-muon correlations. In addition\, measurem ents of the quarkonium muon decay channels will enable us to separate Upsi lon 1S from 2S and 3S states in p+p and A+A collisions. STAR has also emba rked on an upgrade plan to extend the measurement capabilities for jets\, electron/photon and leading particles in the forward rapidity region in th e coming decade. Planned detector upgrades include tracking detectors for charged particles\, electro-magnetic and hadronic calorimeters and particl e identification detector in the forward direction. We will present physic s motivations\, status of detector R&D and design considerations for the f orward measurements focusing on p+p/p+A and polarized p+p collisions. The STAR detector system will be in a unique position to make important measur ements for e+p and e+A physics program during the early phase of the eRHIC era. Our physics considerations and possible detector evolution towards a n eSTAR program will also be discussed.\n\nhttp://indico.cern.ch/contribut ionDisplay.py?contribId=142&sessionId=25&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=142&sessionId=2 5&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Development of W+Si-pad/micro-pad based Electromagnetic Calorimete r for the ALICE upgrade DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-143@cern.ch DESCRIPTION:Speakers: GUNJI\, Taku for the ALICE-FOCAL Collaboration (Univ ersity of Tokyo (JP))\nThe W+Si electromagntic sampling calorimeter has be en proposed as one of the upgrade plans for the LHC-ALICE experiment. \nTh e role of this calorimeter is to add capabilities to measure direct photon s\, pi0's and jets over full azimuth in a forward rapidity region (2.5\n\n http://indico.cern.ch/contributionDisplay.py?contribId=143&sessionId=37&co nfId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=143&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Observation of a difference in $v_{2}$ between particles and anti- particles in Au+Au collisions at $\\sqrt{s_{NN}}=$ 7.7-62.4 GeV with STAR DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-141@cern.ch DESCRIPTION:Speakers: SCHMAH\, Alexander (Lawrence Berkeley National Lab)\ nThe RHIC Beam Energy Scan covers a wide range in the QCD phase diagram te mperature vs. baryon chemical potential. A phase transition between the Qu ark Gluon Plasma and the hadron gas phase is expected in this region of th e QCD phase diagram. The elliptic flow $v_{2}$ is one of the observables w hich is sensitive to the pressure gradients in the initial stage of heavy- ion collisions. Hence it can provide important information about the prope rties of the fireball in the early stage of heavy ion collisions.\n\nEllip tic flow measurements at midrapidity from Au+Au collisions at \\\\ $\\sqrt {s_{NN}}=$ 7.7\, 11.5\, 19.6\, 27\, 39 and 62.4 GeV for identified hadrons ($\\pi^{\\pm}$\,$K^{\\pm}$\, K$_{s}^{0}$\, $p$\, $\\bar{p}$\, $\\phi$\, $ \\Lambda$\, $\\bar{\\Lambda}$\, $\\Xi^{-}$\,$\\bar{\\Xi}^{+}$\, $\\Omega^{ -}$\, $\\bar{\\Omega}^{+}$) are presented. We observe a significant differ ence in $v_{2}$ between particles and corresponding anti-particles at the lowest energies of the beam energy scan. Baryons show a larger difference compared to mesons. The centrality\, particle species and energy dependenc e of the difference will be presented. Furthermore we compare the data to several models and discuss their implications.\n\nhttp://indico.cern.ch/co ntributionDisplay.py?contribId=141&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=141&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Single electrons from heavy flavor decays in 200 GeV Cu+Cu collisi ons at PHENIX DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-612@cern.ch DESCRIPTION:Speakers: APADULA\, Nicole ()\nSince heavy flavor quarks are p roduced early in the collision\, they experience the full evolution of the medium and are thus a good probe of medium effects. Electrons from open heavy flavor have previously been measured for p+p\, Au+Au and d+Au collis ions at the Relativistic Heavy Ion Collider (RHIC) by PHENIX. In the most central Au+Au the yield is suppressed relative to a Ncoll scaled p+p whic h suggests that the heavy quarks lose a significant portion of their initi al energy in the medium. A similar analysis done in the d+Au collisions s uggests that there are cold nuclear matter effects that are masked by the hot\, dense medium produced in the Au+Au collisions. New results from Cu+ Cu collisions provide an important look at the Ncoll region between the d+ Au and Au+Au systems. The Cu+Cu results will be shown for different centr alities along with a comparison to the d+Au and Au+Au results. The nuclea r modification factor\, RAA\, will also be shown as a function of Ncoll\, giving a more complete picture as the cold nuclear matter effects in d+Au collisions are taken over by the effects of the hot medium in the Au+Au sy stem.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=612&sessio nId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=612&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Hadronization: does the chemical freeze-out curve meet the lattice QCD parton-hadron phase boundary ? DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-616@cern.ch DESCRIPTION:Speakers: BECATTINI\, Francesco (Unversity of Florence)\, Mr. SCHUSTER\, Tim (Yale University (US))\nWe analyze hadrochemical freeze-out in central Pb+Pb collisions at CERN\nSPS energies\, employing the hybrid version of the Ultrarelativistic\nQuantum Molecular Dynamics model\, which describes the transition from a\nhydrodynamic stage to hadrons by the Coo per-Frye mechanism\, and matches\nto a final hadron-resonance cascade. We fit the results both before and\nafter the cascade stage using the Statist ical Model\, to assess the\neffect of the cascade phase. We observe an upw ard shift of the\nstatistical model freeze-out curve over the entire range of SPS energies\nif we omit the significantly absorbed antibaryon species from the fit.\nThe freeze-out curve shifts closer to the lattice parton-h adron phase\ntransition line. The corresponding effects are studied at RHI C and LHC\nenergies where the final state annihilation affects both the ba ryon\, and\nantibaryon yields.\n\nreference: arXiv:1201.6349 to appear in Phys. Rev. C\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=616 &sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=616&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Hydrodynamic Fluctuations and Two‐Particle Correlations DTSTART;VALUE=DATE-TIME:20120818T143000Z DTEND;VALUE=DATE-TIME:20120818T143100Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-617@cern.ch DESCRIPTION:Speakers: SPRINGER\, Todd (U)\nWe investigate contributions fr om local hydrodynamic fluctuations to\nthe near side ridge in the two‐pa rticle correlation data from heavy\nion collisions. We introduce a local p erturbation on top of a\nhydrodynamic flow which respects conformal symmet ry and incorporates\nradial flow. The subsequent evolution of the perturba tion is\ndetermined by hydrodynamics\; after freeze‐out\, we examine the effects\nthis local perturbation on the single particle spectrum\, as wel l as\nthe angular and rapidity dependence of the two‐particle correlatio n\nfunction. We hope that our analytical results in this physical system\n with enhanced symmetries will provide guidance to those wishing to\nincorp orate flow fluctuations\n\nhttp://indico.cern.ch/contributionDisplay.py?co ntribId=617&sessionId=29&confId=181055 LOCATION:Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=617&sessionId=2 9&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:A Non-AdS/CFT bound on eta/s DTSTART;VALUE=DATE-TIME:20120816T182000Z DTEND;VALUE=DATE-TIME:20120816T184000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-614@cern.ch DESCRIPTION:Speakers: ROMATSCHKE\, Paul (FIAS Frankfurt)\nHydrodynamics pr edicts long-lived sound and shear waves.\nThermal fluctuations in these wa ves can lead to the diffusion of\nmomentum density\, contributing to the s hear viscosity and other\ntransport coefficients. Within viscous hydrodyna mics in 3+1\ndimensions\, this leads to a positive contribution to the she ar\nviscosity\, which is finite but inversely proportional to the\nmicrosc opic shear viscosity. Therefore the effective infrared\nviscosity is bound ed from below. The contribution to the second-order\ntransport coefficient $\\tau_\\pi$ is divergent\, which means that\nsecond-order relativistic v iscous hydrodynamics is inconsistent below\nsome frequency scale. We estim ate the importance of each effect for\nthe Quark-Gluon Plasma\, finding th em to be minor if $\\eta/s = 0.16$\nbut important if $\\eta/s = 0.08$.\n\n http://indico.cern.ch/contributionDisplay.py?contribId=614&sessionId=18&co nfId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=614&sessionId=1 8&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Flow correlations to constrain the properties of the initial condi tions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-615@cern.ch DESCRIPTION:Speakers: MOTA\, Philipe (Goethe Universität Frankfurt)\nIn t his work\, we propose a new \now correlation observable that provide\nvalu able information about the geometrical properties of the QGP at the\ntherm alization time. An event-by-event analysis within a longitudinal tube\nini tial condition model shows that emitted particles high pt higher than 1\nG eV are extremely sensitive to the level of granularity present in the init ial\nconditions. Therefore\, we studied the e\n\nhttp://indico.cern.ch/con tributionDisplay.py?contribId=615&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=615&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Hard Probes DTSTART;VALUE=DATE-TIME:20120812T183000Z DTEND;VALUE=DATE-TIME:20120812T193000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-689@cern.ch DESCRIPTION:Speakers: LEE\, Yen-Jie (CERN)\nhttp://indico.cern.ch/contribu tionDisplay.py?contribId=689&sessionId=64&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=689&sessionId=6 4&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Hydro & Transport DTSTART;VALUE=DATE-TIME:20120812T173000Z DTEND;VALUE=DATE-TIME:20120812T183000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-688@cern.ch DESCRIPTION:Speakers: Dr. SCHENKE\, Bjoern (Brookhaven National Lab)\nhttp ://indico.cern.ch/contributionDisplay.py?contribId=688&sessionId=64&confId =181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=688&sessionId=6 4&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The QCD Phase Diagram DTSTART;VALUE=DATE-TIME:20120812T130000Z DTEND;VALUE=DATE-TIME:20120812T140000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-685@cern.ch DESCRIPTION:Speakers: Prof. STEPHANOV\, Misha (UIC)\nhttp://indico.cern.ch /contributionDisplay.py?contribId=685&sessionId=40&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=685&sessionId=4 0&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:After Dinner Speaker: "Death from the Skies!" DTSTART;VALUE=DATE-TIME:20120817T004500Z DTEND;VALUE=DATE-TIME:20120817T020000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-684@cern.ch DESCRIPTION:Speakers: Dr. PLAIT\, Phil ()\nhttp://indico.cern.ch/contribut ionDisplay.py?contribId=684&confId=181055 LOCATION: URL:http://indico.cern.ch/contributionDisplay.py?contribId=684&confId=1810 55 END:VEVENT BEGIN:VEVENT SUMMARY:Soft Hadronic Probes DTSTART;VALUE=DATE-TIME:20120812T153000Z DTEND;VALUE=DATE-TIME:20120812T163000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-687@cern.ch DESCRIPTION:Speakers: SORENSEN\, Paul (BNL)\nhttp://indico.cern.ch/contrib utionDisplay.py?contribId=687&sessionId=40&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=687&sessionId=4 0&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Small-x Physics and Saturation DTSTART;VALUE=DATE-TIME:20120812T143000Z DTEND;VALUE=DATE-TIME:20120812T153000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-686@cern.ch DESCRIPTION:Speakers: LOPEZ ALBACETE\, Javier (IPhT-CEA)\nhttp://indico.ce rn.ch/contributionDisplay.py?contribId=686&sessionId=40&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=686&sessionId=4 0&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Rapporteur Talk: Global Variables and Correlations DTSTART;VALUE=DATE-TIME:20120818T150000Z DTEND;VALUE=DATE-TIME:20120818T153000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-681@cern.ch DESCRIPTION:Speakers: HIPPOLYTE\, Boris (Institut Pluridisciplinaire Huber t Curien (FR))\, RISCHKE\, Dirk (University Frankfurt)\nhttp://indico.cer n.ch/contributionDisplay.py?contribId=681&sessionId=30&confId=181055 LOCATION:Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=681&sessionId=3 0&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Rapporteur Talk: Heavy Flavor\, Quarkonia and Electroweak Probes DTSTART;VALUE=DATE-TIME:20120818T160000Z DTEND;VALUE=DATE-TIME:20120818T163000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-683@cern.ch DESCRIPTION:Speakers: RUAN\, Lijuan ()\, GALE\, Charles (McGill University )\nhttp://indico.cern.ch/contributionDisplay.py?contribId=683&sessionId=30 &confId=181055 LOCATION:Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=683&sessionId=3 0&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Rapporteur Talk: High Pt and Jets DTSTART;VALUE=DATE-TIME:20120818T153000Z DTEND;VALUE=DATE-TIME:20120818T160000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-682@cern.ch DESCRIPTION:Speakers: MILOV\, Alexander (Weizmann Institute of Science (IL ))\, CASALDERREY SOLANA\, Jorge (University of Barcelona (ES))\nhttp://ind ico.cern.ch/contributionDisplay.py?contribId=682&sessionId=30&confId=18105 5 LOCATION:Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=682&sessionId=3 0&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Overview of recent ALICE results DTSTART;VALUE=DATE-TIME:20120813T153500Z DTEND;VALUE=DATE-TIME:20120813T160000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-623@cern.ch DESCRIPTION:Speakers: SAFARIK\, Karel (CERN)\nhttp://indico.cern.ch/contri butionDisplay.py?contribId=623&sessionId=42&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=623&sessionId=4 2&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Model-independent separation of flow and nonflow in relativistic h eavy-ion collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-459@cern.ch DESCRIPTION:Speakers: Dr. KIKOLA\, Daniel (Purdue University)\nAnisotropic flow\, which arises from correlations to the common collision geometry\, is sensitive to the early stage of the expansion of the medium created in relativistic heavy-ion collisions. Azimuthal anisotropy is measured by fin al state particle correlations and is thus contaminated by correlations un related to the common geometry (nonflow). The contamination of nonflow ha mpers further advancement in our study of relativistic heavy-ion collision s\, in at least two areas: it prevents a more precise determination of the viscosity to entropy density ratio eta/s of the QGP medium from flow meas urements\, and it limits the power of jet-like correlations in probing par tonic energy loss mechanisms where flow presents a background to be subtra cted. Recently it has been shown that the measured two-particle correlatio n Fourier coefficients approximately factorize\, and it was argued that th is indicates the dominance of flow. In this talk we show by PYTHA simulati ons of p+p collisions that factorization approximately holds also for jet- like correlations and therefore is only a necessary but not sufficient con dition for flow [1]. We suggest that nonflow factorization can in turn be used to disentangle flow and nonflow as a function of particle transverse momentum by performing a two-component factorization fit to Fourier coeffi cients [1]. However\, such disentanglement is model dependent\, so are all other experimental nonflow studies thus far. To revamp this\, we present in this talk a novel\, model-independent method to decompose \\Delta\\eta- dependent and independent correlations using two- and four-partice cumulan ts between \\eta bins\, exploiting the symmetry of flow about midrapidity in symmetric heavy-ion collisions [2]. The \\Delta\\eta-independent correl ations are dominated by anisotropic flow while the \\Delta\\eta-dependent correlations can be identified as nonflow. We illustrate our method using the AMPT and HIJING event generators. We discuss our decomposed flow and n onflow from the models. We further discuss the applicability of our method in separating flow and nonflow in real data at RHIC and LHC.\n\n[1] Danie l Kikola\, Li Yi\, ShinIchi Esumi\, Fuqiang Wang and Wei Xie. arXiv:1110.4 809 [nucl-ex]\n[2] Lingshan Xu\, Li Yi\, Daniel Kikola\, Joshua Konzer\, F uqiang Wang and Wei Xie. arXiv:1204.2815 [nucl-ex]\n\nhttp://indico.cern.c h/contributionDisplay.py?contribId=459&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=459&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Hydrodynamic fluctuations in expanding medium DTSTART;VALUE=DATE-TIME:20120817T192000Z DTEND;VALUE=DATE-TIME:20120817T194000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-133@cern.ch DESCRIPTION:Speakers: Prof. STEPHANOV\, Misha (UIC)\nWe describe intrinsic hydrodynamic fluctuations of the expanding\nboost-invariant (Bjorken) sol ution. We find that these fluctuations\nare correlated over a wide rapidit y range due to the propagation of\nthe sound modes\, whose dispersion is n ontrivial because of the\nexpansion. Since the magnitudes of these correla tions are proportional\nto viscosities\, their measurement can\, in princi ple\, be used to obtain\ninformation about the transport coefficients as w ell as thermodynamic\nproperties of the medium.\n\nhttp://indico.cern.ch/c ontributionDisplay.py?contribId=133&sessionId=26&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=133&sessionId=2 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Monte-Carlo study of jets in heavy-ion collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-132@cern.ch DESCRIPTION:Speakers: YOUNG\, Clint (McGill University)\nJets have proven to be an important observable of heavy-ion collisions at the LHC\; recent analysis has also made jets an important probe at RHIC energies as well. U nlike the spectrum of single hadrons\, the spectrum of jets is highly sens itive to $\\hat{q}_{\\perp}$\, as well as being sensitive to partonic ener gy loss and radiative processes. We use MARTINI\, an event generator\, to study how finite-temperature processes at leading order affect single jet \, dijet\, and photon-jet observables. Finally\, finite-temperature effect s on the momenta of heavy quarks are simulated and compared with data for open heavy flavor mesons.\n\nhttp://indico.cern.ch/contributionDisplay.py? contribId=132&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=132&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Dielectron measurements by PHENIX using the HBD DTSTART;VALUE=DATE-TIME:20120815T125000Z DTEND;VALUE=DATE-TIME:20120815T131000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-137@cern.ch DESCRIPTION:Speakers: Dr. ATOMSSA\, Ermias (Stony Brook University)\nMeasu rements of lepton pair spectra are a crucial tool to map out the evolution of the hot dense matter created in ultra-relativistic heavy ion collision s. At low pair mass\, direct photons and low mass vector mesons are the ma in center of interest. Interpretation of lepton pair production rates in e xcess of expectations from hadronic decays observed by PHENIX and how the data constrains theoretical models on thermalization and chiral symmetry r estoration is a hotly debated topic. At intermediate and high mass\, the d i-electron spectrum has been used by PHENIX to measure cross sections of o pen charm and open bottom\, as well as Quarkonium suppression with implica tions for color screening and recombination.\n\nDue to the small signal to background ratio\, measurement of the dielectron spectrum\, especially at low mass\, is very challenging. In PHENIX\, the background results mainly from random combinations of electron positron pairs from uncorrelated sou rces\, mostly $\\pi^0$ Dalitz decays and photon conversions. The Hadron Bl ind Detector (HBD) was developed to address this issue. The HBD accomplish es this by tagging and rejecting tracks from conversions and $\\pi^0$ Dali tz decays. It was successfully operated in RHIC run years 2009 to 2010\, w here Au+Au and reference p+p data sets were taken. We will present the die lectron results from the analysis of these data sets.\n\nhttp://indico.cer n.ch/contributionDisplay.py?contribId=137&sessionId=10&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=137&sessionId=1 0&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Energy dependence of identified hadron multiplicity fluctuations i n Heavy Ion collisions at the CERN SPS DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-136@cern.ch DESCRIPTION:Speakers: Dr. RUSTAMOV\, Anar (Frankfurt University)\nThe stud y of event-by-event (e-by-e) fluctuations of chemical (particle-type) comp osition in high-energy nucleus-nucleus collisions is a helpful tool to pin -down the properties of strongly interacting matter. Indeed\, according t o theoretical calculations\, the QCD critical point may be signalled by a characteristic pattern in the measured fluctuations. On the other hand\, a n incomplete particle identification may grossly bias final experimental r esults. In this context a new method for e-by-e fluctuations of identified particles will be introduced. In particular\, using this method\, the ene rgy dependence of multiplicity fluctuations of identified particles in cen tral Pb+Pb collisions\, measured by NA49\, will be presented.\n\nhttp://in dico.cern.ch/contributionDisplay.py?contribId=136&sessionId=37&confId=1810 55 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=136&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Imprinting quantum fluctuations on hydrodynamic initial conditions DTSTART;VALUE=DATE-TIME:20120815T154000Z DTEND;VALUE=DATE-TIME:20120815T160000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-135@cern.ch DESCRIPTION:Speakers: Mr. MORELAND\, J. Scott (Duke University)\nThe preci se value of the QGP kinematic shear viscosity eta/s is a question of inten se topical interest. Viscous hydrodynamic simulations are a tool for extra cting this information from experiment. The key observables are the anisot ropic flow coefficients v_n which (i) can be measured very precisely and ( ii) are very sensitive to eta/s which controls the "conversion efficiency" v_n/ecc_n for turning initial fireball eccentricities of harmonic order n into final flows of the same harmonic order. \n\nBoth ecc_n and v_n fluct uate strongly from collision to collision. These event-by-event fluctuatio ns have a key influence on the measurements [1] and must be properly taken into account when extracting eta/s. Until recently\, most initial-state m odels accounted only for the shape and density fluctuations arising from t he fluctuating positions of the nucleons in the colliding nuclei. This lea ds to fluctuations in the location of the newly produced matter\, and thus of the initial energy density profile of the expanding fireball and its e ccentricities ecc_n\, but does not account for additional quantum fluctuat ions in the quark and gluon fields inside the nucleons that lead to fluctu ating numbers of secondary particles per nucleon-nucleon interaction. Seve ral recent papers have addressed the implementation of these quantum fluct uations in the hydrodynamic initial conditions for the expanding collision fireball. \n\nStarting from the Monte Carlo Kharzeev-Levin-Nardi (MC-KLN) model for generating fluctuating initial profiles for the gluon saturatio n momentum Q_sat(x_T) in the transverse plane\, we have developed a Monte Carlo algorithm that uses a Gaussian Random Field (GRF) generator [2] to g enerate a distribution of gluonic energy densities centered at the value c orresponding to the field Q_sat(x_T)\, but fluctuating around this profile with the two-point covariance function derived in [3] from the Glasma mod el. To ensure that the energy density is everywhere positive the GRF is ma pped to an appropriate negative binomial distribution (NBD) with the same variance. NBD fluctuations have been recently shown to arise naturally fro m the Glasma model and to describe the measured multiplicity distributions in pp collisions at the LHC. The resulting density profile features ``hot spots" as in the MC-KLN model overlaid with a fluctuating field texture c haracterized by an intrinsic length scale 1/Q_sat(x_T).\n \nWe show that i nclusion of these additional gluonic quantum field fluctuations leads to o nly a small (few percent) increase of the initial eccentricities ecc_n in central collisions and to almost negligible effects at larger impact param eters. These findings disagree with some of the results reported in [4]\, and we will discuss possible origins for this discrepancy. Our results imp ly that an earlier extraction of the QGP shear viscosity from a combined a nalysis of elliptic and triangular flow data from Pb-Pb collisions at the LHC [5] is robust.\n\nReferences\n \n[1] Zhi Qiu and U. Heinz\, ``Event- by-event shape and flow fluctuations of relativistic heavy-ion collision f ireballs\,'' Phys. Rev. C84\, 024911 (2011).\n\n[2] X. Emery and C. Lantue joul\, ``TBSIM: A computer program for conditional simulation of 3-dimensi onal Gaussian random fields via the turning bands method\," Computers and Geosciences 32\, 1615 (2006).\n\n[3] B. Muller and A. Schafer\, ``Transver se energy density fluctuations in the Color Glass Condensate Model\,'' arX iv:1111.3347 [hep-ph].\n\n[4] B. Schenke\, P. Tribedy and R. Venugopalan\, ``Fluctuating Glasma initial conditions and flow in heavy ion collisions\ ,'' arXiv:1202.6646 [nucl-th]\; F. Gelis\, T. Lappi and L. McLerran\, ``Gl ittering Glasmas\,'' Nucl. Phys. A 828\, 149 (2009)\; A. Dumitru and Y. Na ra\, ``KNO scaling of fluctuations in pp and pA\, and eccentricities in he avy-ion collisions\,'' Phys. Rev. C85\, 034907 (2012).\n\n[5] Z. Qiu\, C. Shen and U. Heinz\, ``Hydrodynamic elliptic and triangular flow in Pb-Pb c ollisions at sqrt(s)=2.76ATeV\,'' Phys. Lett. B707\, 151 (2012).\n\nhttp:/ /indico.cern.ch/contributionDisplay.py?contribId=135&sessionId=54&confId=1 81055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=135&sessionId=5 4&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Thermalization and Possible Bose-Einstein Condensation in Over-pop ulated Glasma DTSTART;VALUE=DATE-TIME:20120817T180000Z DTEND;VALUE=DATE-TIME:20120817T182000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-134@cern.ch DESCRIPTION:Speakers: LIAO\, Jinfeng (Indiana University & RIKEN BNL Resea rch Center)\nWe report on a recently proposed scenario for thermalization of hot QCD matter after the "Little Bang" in heavy ion collisions. A disti nctive feature of the pre-equilibrium system (the Glasma) is the high over -population of phase space for gluons\, which we argue plays a central rol e for the thermalization of the Quark-Gluon Plasma. In particular\, the ov er-population (1) coherently amplifies scattering by $1/\\alpha_s$ and mak es the system behave as a strongly interacting fluid despite being out of equilibrium at weak coupling\, (2) may lead to the dynamical\, albeit tran sient formation of a Bose-Einstein condensate over the course of thermaliz ation. A further distinctive feature of our scenario is that the initially single scale ($Q_s$) of Glasma develops into a hierarchy of scales\, with the IR scale and the UV separated by coupling $\\alpha_s$\, precisely as in equilibrium thermal field theory. We demonstrate these features by solv ing the Boltzmann equation in the small angle approximation and in the reg ime where the occupation numbers are large. Finally\, we address possible phenomenological consequences of our scenario.\n\nhttp://indico.cern.ch/co ntributionDisplay.py?contribId=134&sessionId=36&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=134&sessionId=3 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Upgrade of the ALICE Experiment DTSTART;VALUE=DATE-TIME:20120817T184000Z DTEND;VALUE=DATE-TIME:20120817T190000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-494@cern.ch DESCRIPTION:Speakers: PEITZMANN\, Thomas (University of Utrecht (NL))\nAt the LHC the ALICE experiment is taking data in p+p\, p+A and A+A collision s\, which is providing unique insights on strongly interacting matter at a n unprecedented energy density. Many important questions in heavy-ion phys ics will\, however\, remain unanswered in this first running period up to 2017. Only by increasing the luminosity beyond 10^27 and exploiting recent advances in technology ALICE will be able to address the new and remainin g scientific challenges. ALICE is therefore setting up a program of detect or upgrades\, to be installed in the LHC shutdown planned for 2018. The pl anned upgrades will give access to otherwise unreachable rare processes\, in particular observables involving heavy quarks and quarkonia at low tran sverse momentum\, but also low-mass dileptons\, selected topics in photon- jet physics with identified particles\, and the search for heavy nuclear s tates. The potential of unique low-x measurements is also investigated. We will discuss examples of the scientific frontiers and the strategy of ALI CE to address them. We will include an overview of the specific upgrade pr ojects under study for the ALICE experiment.\n\nhttp://indico.cern.ch/cont ributionDisplay.py?contribId=494&sessionId=25&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=494&sessionId=2 5&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The ALICE Inner Tracking System Upgrade DTSTART;VALUE=DATE-TIME:20120817T192000Z DTEND;VALUE=DATE-TIME:20120817T194000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-495@cern.ch DESCRIPTION:Speakers: LEMMON\, Roy Crawford (Engin. & Phys. Sci. Research Coun. (GB))\nThe major long-term goal of the ALICE experiment at the LHC i s to provide precision measurements of the properties of the Quark-Gluon P lasma\, the state of deconfined matter produced in high-energy heavy-ion c ollisions. Experiments towards the characterisation of strongly interactin g matter at high density will need to focus on rare probes and the study o f their collective properties and hadronization\, particularly at soft mom entum scales. Such considerations have motivated the development of a comp rehensive upgrade strategy for ALICE to provide high rate capability (50 k Hz for Pb-Pb collisions) in a near minimum bias mode by building a new Inn er Tracking System and by modifying all major ALICE detectors to provide a fully pipelined read-out. This implies also a major upgrade of the data a cquisition and high level trigger system. Further details of the overall A LICE upgrade strategy are described in [1]. This contribution will describ e the proposed approach to upgrading the Inner Tracking System (ITS) in or der to both comply with the new requirements set by the ALICE global upgra de strategy and to dramatically improve the performance for heavy-flavour detection. The ITS Upgrade will have greatly improved features in terms of : determination of the distance of closest approach (dca) to the primary v ertex\, standalone tracking efficiency at low pt\, momentum resolution and readout capabilities. These improvements are possible as a consequence of the spectacular progress made in the field of imaging sensors over the la st ten years as well as the possibility to install a smaller radius beampi pe. Moreover a tracker with the above features\, in particular a high stan dalone tracking efficiency\, creates an opportunity to perform\, in combin ation with the TRD and TOF detectors\, online event selection on the basis of topological and PID criteria. Such a new silicon tracker will allow AL ICE to measure charm and beauty production in Pb-Pb collisions with suffic ient statistical accuracy down to very low transverse momentum\, measure charm baryons and perform exclusive measurements of beauty production. A c omprehensive description of the ITS Upgrade can be found in the recent Con ceptual Design Report [2].\n\n[1] Upgrade Strategy for ALICE at High Rate\ , CERN-LHCC-2012-04.\n[2] Conceptual Design Report for the Upgrade of the ALICE ITS\, CERN-LHCC-2012-05.\n\nhttp://indico.cern.ch/contributionDispla y.py?contribId=495&sessionId=25&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=495&sessionId=2 5&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Initial conditions for fluid dynamics from a parton cascade model DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-139@cern.ch DESCRIPTION:Speakers: BOURAS\, Ioannis (University of Frankfurt a.M.)\nThe initial conditions play a fundamental role in the fluid-dynamical modelin g of the quark-gluon plasma (QGP) created in ultrarelativistic heavy-ion c ollisions. Many observables that are important in determining the properti es of the QGP\, such \nas elliptic flow (v2) and triangular flow (v3)\, ap pear to be generated mainly from the initial geometry of the energy densit y profile. Since the initial conditions remain undetermined\, it introduce s a large uncertainty in the extraction of the \nproperties of the QGP. \n \nTypically it is assumed that the matter thermalizes and fluid dynamics c an be applied after time of the order of $1$ fm/c after the initial nuclea r collision. However\, the matter itself can be created much earlier\, and it undergoes pre-equilibrium evolution \nbefore fluid dynamics can be app lied. In this work\, we estimate the impact of the pre-equilibrium evoluti on of the QGP on the initial conditions for fluid dynamics using a parton cascade model. \n\nFor the initial conditions for the pre-equilibrium evol ution we use a realistic 6--dimensional parametrization of the initial sin gle-particle distribution function $f(x\, p)$ that reflect\, e.g. the obse rved rapidity and multiplicity distributions at RHIC and LHC.\nThen\, we s olve the time evolution of this distribution using the relativistic Boltzm ann equation\, up to times of the order of 1 fm/c\, for various values of partonic cross sections. The relativistic Boltzmann equation is solved usi ng the \nBAMPS algorithm Ref. [1].\n\nThe main advantage of our approach i s that we are able to compute\, not only the energy density distribution a t $t=1$ fm\, but also the velocity and shear-stress tensor profiles\, whic h\, so far\, are mostly unknown. \n\n[1] Z. Xu and C. Greiner\, Phys. Rev. C 71 (2005) 064901\; Phys. Rev. C 76\, 024911 (2007).\n\nhttp://indico.ce rn.ch/contributionDisplay.py?contribId=139&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=139&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Jpsi and psi (2S) production in Pb-Pb collisions with the ALICE M uon spectrometer at the LHC DTSTART;VALUE=DATE-TIME:20120814T183500Z DTEND;VALUE=DATE-TIME:20120814T185500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-497@cern.ch DESCRIPTION:Speakers: ARNALDI\, Roberta (Universita e INFN (IT))\nALICE is the LHC experiment dedicated to the study of heavy ion collisions. The ma in purpose of ALICE is to investigate the properties of a new state of dec onfined nuclear matter\, the Quark Gluon Plasma. Quarkonium measurements w ill play a crucial role in this investigation. In particular\, the sequent ial suppression of the quarkonium states by color screening has long being suggested as a signature and thermometer of the QGP.\n\nhttp://indico.cer n.ch/contributionDisplay.py?contribId=497&sessionId=5&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=497&sessionId=5 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of the J/Psi production cross section in ultraperipher al Pb-Pb collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-491@cern.ch DESCRIPTION:Speakers: BOLD\, Tomasz (AGH Univ. of Science amp\; Technology \, Krakow)\nThe results of the study of ultraperipheral (gamma-gamma and g amma-Pomeron) interactions are presented. The analysis was performed with the data recorded by the ATLAS experiment during LHC Pb-Pb run in year 201 1. The data\, taken at the beam energy of 2.75 TeV per nucleon\, correspon d to an integrated luminosity of 141/microbarn. Muon pairs\, produced in p ure electromagnetic two-photon interactions and in reactions of J/Psi phot oproduction\, were analyzed and the cross section of AA -> AA + mu+mu- rea ction was measured. Another measurement of the J/Psi photoproduction cross section was carried out with the events accompanied by mutual neutron emi ssion and triggered by Zero Degree Calorimeter.\n\nhttp://indico.cern.ch/c ontributionDisplay.py?contribId=491&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=491&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Charged particle spectra and nuclear modification factor in lead-l ead collisions at 2.76 TeV with the ATLAS detector at the LHC. DTSTART;VALUE=DATE-TIME:20120816T184000Z DTEND;VALUE=DATE-TIME:20120816T190000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-492@cern.ch DESCRIPTION:Speakers: BALEK\, Petr (Charles University (CZ))\nThe measurem ent of charged particle spectra in heavy ion collisions is a direct way to study properties of hot and dense matter created in these interactions. T he centrality dependence of the spectral shape is an important tool to und erstand the energy loss mechanism. The ATLAS detector at the LHC accumulat ed 150µb-1 of lead-lead data at 2.76 TeV per nucleon-nucleon pair. Due to the excellent capabilities of the ATLAS detector\, and its stable operati on in 2010 and 2011 heavy ion physics runs\, these data allow measurements of the charged particle spectra and their ratios in different centrality bins over a wide range of transverse momenta and pseudorapidity.\n\nhttp:/ /indico.cern.ch/contributionDisplay.py?contribId=492&sessionId=17&confId=1 81055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=492&sessionId=1 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Forward azimuthal correlations in 200 GeV p+p and d+Au collisions at STAR DTSTART;VALUE=DATE-TIME:20120815T162000Z DTEND;VALUE=DATE-TIME:20120815T164000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-25@cern.ch DESCRIPTION:Speakers: LI\, Xuan (Shandong University)\nThe proton gluon di stribution function increases rapidly with decreasing x at fixed $Q^{2}$\, but cannot increase indefinitely as x goes to 0. Gluon saturation is expe cted at a low x value when gluon recombination balances gluon splitting. T he nuclear (with atomic mass number A) gluon distribution is approximately $A^{1/3}$ larger than the nucleon gluon distribution function at the same x [1]. STAR is sensitive to x between 0.001 and 0.02 for the nuclear gluo n distribution via di-jet measurements with calorimeter subsystems coverin g -1 \n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=25&session Id=54&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=25&sessionId=54 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:On the Nature and Composition of the low-lying scalar mesons DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-26@cern.ch DESCRIPTION:Speakers: MUKHERJEE\, Tamal Kumar (Institute of High Energy Ph ysics\, TPCSF)\nWe follow chiral effective model [1] of a quarkonia nonet and a tetraquark nonet as well as a complex iso-singlet (glueball) field t o study the lowest lying scalar mesons on the basis of chiral symmetry and UA(1) symmetry. By virtue of the isospin symmetry\, the isospin 1 and iso spin 1/2 physical states are assumed to have two and four bare quark compo nents whereas I = 0 physical scalar and pseudoscalar mesons are assumed to have all the three bare components. We find that the model can accommodat e the mass spectra of low-lying states quite well. Based on our result\, w e will discuss on the nature of the lowest iso-scalar f0(600) or sigma mes on as well as the possible scalar and pseudoscalar glueball candidates. \ n\nReferece: \n\n1. Tamal K. Mukherjee\, Mei Huang and Qi-Shu Yan\, arXiv: 1203.5717 [hep-ph].\n\nhttp://indico.cern.ch/contributionDisplay.py?contri bId=26&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=26&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Baryon number conservation and cumulants of net proton distributio n DTSTART;VALUE=DATE-TIME:20120817T211000Z DTEND;VALUE=DATE-TIME:20120817T213000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-27@cern.ch DESCRIPTION:Speakers: BZDAK\, Adam (Brookhaven National Laboratory)\nWe di scuss the effects of the global baryon and electric charge conservation on the cumulants of net baryon and net proton fluctuations [1]\, which are c onsidered to be sensitive probes of the QCD critical point. We show that t he cumulants are substantially suppressed if the conservation laws are tak en into account. We propose a new observable that is not influenced by the global baryon conservation but is highly sensitive to the critical end po int or the crossover.\n\n[1] A. Bzdak\, V. Koch\, V. Skokov\, arXiv:1203.4 529 [hep-ph]\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=27& sessionId=57&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=27&sessionId=57 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Azimuthal Correlation of Charm at Large Hadron Collider DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-22@cern.ch DESCRIPTION:Speakers: YOUNUS\, Mohammed (Variable Energy Cyclotron Centre) \nWe present the azimuthal correlation of charm\, anti-charm pairs produce d at LHC energies. We show our results for both proton on proton collision as well as lead on lead collision.\n An empirical model has been includ ed to show the effect of \nenergy loss on the correlation . Separately an effect of collective flow using blast wave model on the correlation is als o shown.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=22&sess ionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=22&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Turbulent instability in low viscosity quark-gluon plasma DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-23@cern.ch DESCRIPTION:Speakers: CSERNAI\, Laszlo Pal ()\nFlow asymmetries are in foc us of present heavy ion studies. In head-on collisions there would be no r eason to have an azimuthal or longitudinal asymmetry\, nevertheless\, new observations for the higher harmonics show [1] that even in central collis ions there is a strong azimuthal asymmetry in the emitted hadrons\, and th is asymmetry arises from transverse fluctuations of the initial state. Thi s poses a challenge to separate the flow characteristics arising from coll ective global asymmetries and from random fluctuations. Here we study flow asymmetries arising from global asymmetries in peripheral collisions.\n\n The dynamical development of collective flow of prefect QGP fluid is studi ed in a (3+1)D fluid dynamical model for peripheral heavy-ion collisions\, with globally symmetric\, initial conditions\, which take into account th e shear flow caused by the forward motion of the matter on the projectile side and the backward motion on the target side. While at $\\sqrt{s_{NN}} = 2.76A$\\\,TeV semi-peripheral Pb+Pb collisions the earlier predicted ro tation effect [2] is visible in the calculations\, at more peripheral coll isions\, with high resolution and low numerical viscosity the initial deve lopment of a Kelvin-Helmholtz instability (KHI) is observed [3]\, which al ters the flow pattern considerably. On the initial dividing plane a wave d evelops\, and the dividing plane develops into a turning nonlinear wave. T he wave develops only in peripheral reactions with very low numerical visc osity. The KHI wave is visible in the reaction plane if we mark the motion of the fluid which was initially on the dividing plane. The direction of the wave is such that it enhances the rotation effect and increases the as ymmetry of the global collective $v_1(y)$. The possibility of turbulence i n the transverse plane developing from initial fluctuations was also point ed out recently [4].\n\nAlthough\, the predicted rotation effect is not ea sily detectable due to longitudinal initial state fluctuations\, the KHI e nhances the flow asymmetry and changes its pattern in peripheral collision s. The present developments suggest that the global collective $v_1$ flow can be disentangled from random fluctuations. This is necessary to measur e the global collective flow in peripheral collisions.\n\nThe KHI is very sensitive to the magnitude of the viscosity. Thus if this research is suc cessful the analysis of global collective $v_1$ flow as a function of beam energy and impact parameter may provide a precision measurement of viscos ity and its variation.\n\n[1] K. Aamodt et al.\, (ALICE Collaboration) Phy s. Lett. B708\, 249 (2012). \n[2] L.P. Csernai\, V.K. Magas\, H. Stöcker\ , D.D. Strottman\, Phys. Rev. C84\, 02914 (2011).\n[3] L.P. Csernai\, D.D. Strottman\, and Cs. Anderlik\, arXiv:1112.4287v1 [nucl-th]\, and Phys. Re v. C (2012) in press. \n[4] S. Floerchinger\, U.A. Wiedemann\, JHEP 11\, 1 00 (2011).\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=23&se ssionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=23&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:QGP shear viscosity from combined analysis of elliptic and triangu lar flow DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-29@cern.ch DESCRIPTION:Speakers: Dr. QIU\, Zhi (Ohio State University)\nThe Quark-Glu on Plasma (QGP) created in heavy-ion collisions is well described by visco us hydrodynamic simulations. A key QGP transport coefficient\, its specifi c shear viscosity eta/s\, can be extracted by comparing such simulations w ith experimental data. Previous extractions gave (eta/s)_QGP ~ (1-2.5)/(4\ \pi) where the ~100% uncertainty arises mainly from ambiguities in the ini tial fireball shape and density profile. To obtain (eta/s)_QGP with better precision\, the ambiguities in the initial conditions must be addressed.\ n\nPublished extractions of the specific shear viscosity have relied on el liptic flow measurements and the fact that eta/s suppresses elliptic flow. It was recently realized that higher order harmonic flows are suppressed even more strongly with increasing eta/s\, and that the recently measured triangular flow allows to simultaneously constrain eta/s and the initial c onditions: viable initial conditions should describe the elliptic and tria ngular flows v2 and v3 simultaneously with the same eta/s. We have perform ed such a simultaneous analysis of v2 and v3 [1]. We show that the normali zed elliptic and triangular flow coefficients v2/ecc2 and v3/ecc3 (where e cc_n are the n-th order eccentricities of the initial state) can be obtain ed with 10-15% accuracy using single-shot hydrodynamical simulations where the initial conditions are averaged before hydrodynamical evolution\, ins tead of the more realistic but costly event-by-event hydrodynamical approa ch where averaging is done only after separate evolution of each fluctuati ng initial condition.\n\nFor elliptic flow we find that\, within 10-15%\, v2/ecc2 = v2{2}/ecc2{2} = v2{4}/ecc2{4} where the expression on the left i s obtained from single-shot hydrodynamics while the cumulant expressions o n the right are extracted from event-by-event hydrodynamics. For triangula r flow we find\, at the same level of precision\, that v3/ecc3=v3{2}/ecc3{ 2} \\neq v3{4}/ecc3{4}. The ALICE data for charged hadron elliptic and tri angular flow from Pb-Pb collisions at the LHC [2] are shown to obey these approximate (in-)equalities. Our hydrodynamic analysis [1] shows that the ALICE v2 and v3 data [2] can be explained simultaneously\, at all collisio n centralities\, if (eta/s)_QGP \\approx 1/(4\\pi). This requires MC-Glaub er initial conditions which have smaller ecc2 than CGC-motivated MC-KLN in itial conditions. For MC-KLN initial conditions the v2 data require larger (eta/s)_QGP ~ (2-2.5)/(4\\pi) which\, however\, then underpredicts the me asured triangular flow by 35-40%. We conclude that the large v3 measured a t the LHC requires either almost minimal QGP shear viscosity (eta/s)_QGP \ \approx 1/(4\\pi)\, or a presently unknown mechanism for increasing the tr iangularity fluctuations in the initial state by ~50%.\n\n[1] Zhi Qiu\, Ch un Shen\, and Ulrich Heinz\, ``Hydrodynamic elliptic and triangular flow i n Pb-Pb collisions at sqrt(s)=2.76 A TeV\,'' Phys. Lett. B707\, 151-155 (2 012).\n\n[2] K. Aamodt et al. (ALICE Coll.)\, ``Higher harmonic anisotropi c flow of charged particles in Pb-Pb collisions at sqrt(s_NN)=2.76 TeV\," Phys. Rev. Lett. 107\, 032301 (2011).\n\nhttp://indico.cern.ch/contributio nDisplay.py?contribId=29&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=29&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Study of the production of B mesons in pp and Pb-Pb collisions usi ng displaced electrons in ALICE DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-407@cern.ch DESCRIPTION:Speakers: KWEON\, Min Jung (Ruprecht-Karls-Universitaet Heidel berg (DE))\nHeavy quarks are expected to be a probe providing new constrai nts on partonic energy loss mechanisms in the medium produced in heavy-ion collisions at the LHC. In particular\, the medium-induced parton energy l oss is expected to depend on its mass and colour charge. The measurement o f heavy quark production in pp collisions provides an important test of pQ CD calculations and serves as a baseline for studies in heavy-ion collisio ns. The production of electrons from beauty hadron decays can be measured using their displacement from the primary vertex.\nThe pt diff\n\nhttp://i ndico.cern.ch/contributionDisplay.py?contribId=407&sessionId=37&confId=181 055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=407&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Elastic scattering\, total cross-section and charged particle pseu dorapidity density in 7 TeV pp reactions measured by the TOTEM Experiment at the LHC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-405@cern.ch DESCRIPTION:Speakers: CSANAD\, Mate (for the TOTEM Collaboration)\nThe TOT EM experiment at LHC measured the differential cross-section of elastic p+ p scattering at 7 TeV\, with the help of Roman Pot detectors placed as clo se as seven times the transverse beam size from the outgoing beams [1]. Re sults indicate an initial exponential decrease of dsigma/dt\, followed by a significant diffractive minimum at |t| = (0.53 +- 0.01(stat) +- 0.01(sys t)) GeV**2. For large |t| values\, the cross-section exhibits a power law behavior.\nBy extrapolation of measured elastic p+p cross sections to |t| = 0\, TOTEM obtained a total elastic scattering cross-section of 24.8 +- 0 .2(stat) +- 1.2(syst)) mb [2]. Applying the optical theorem and using the luminosity measurement from CMS\, a total proton-proton cross-section of ( 98.3 +- 0.2(stat) +- 2.8(syst)) mb was deduced.\nTOTEM also measured the c harged particle pseudorapidity density dN/deta in p+p collisions at 7 TeV\ , in the pseudorapidity range 5.3 \n\nhttp://indico.cern.ch/contributionDi splay.py?contribId=405&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=405&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Production of Charged Pions\, Kaons\, and Protons in 2.76 TeV Pb-P b Collisions at high p_t measured with the ALICE Experiment. DTSTART;VALUE=DATE-TIME:20120816T182000Z DTEND;VALUE=DATE-TIME:20120816T184000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-401@cern.ch DESCRIPTION:Speakers: ORTIZ VELASQUEZ\, Antonio (Lund University (SE))\nTh e main tracking detector in the central barrel ($|\\eta| 3$ GeV/c.\n\nIn t his talk\, spectra for charged pions\, kaons\, and protons from pp collisi ons at $\\sqrt{s} = 2.76$ TeV and Pb-Pb collisions at $\\sqrt{s_{NN}}$ = 2 .76 TeV for $3 \n\nhttp://indico.cern.ch/contributionDisplay.py?contribId= 401&sessionId=17&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=401&sessionId=1 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Pseudorapidity density of charged particles in a wide pseudorapidi ty range and its centrality dependence in Pb-Pb collisions at 2.76 TeV DTSTART;VALUE=DATE-TIME:20120814T212500Z DTEND;VALUE=DATE-TIME:20120814T214500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-400@cern.ch DESCRIPTION:Speakers: GUILBAUD\, Maxime Rene Joseph (Universite Claude Ber nard-Lyon I (FR))\nIn this talk we present a measurement of the pseudorapi dity distribution in the range −5 \n\nhttp://indico.cern.ch/contribution Display.py?contribId=400&sessionId=47&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=400&sessionId=4 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Hadronic calorimetry R&D for future PHENIX DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-452@cern.ch DESCRIPTION:Speakers: KOTCHETKOV\, Dmitri (Ohio University (US))\nThe PHEN IX detector was designed and built at the Relativistic Heavy Ion Collider to explore matter created in collisions of heavy nuclei. PHENIX\, as an in frastructure of technologically different systems\, has been recording dat a since 2000. Research results by the PHENIX experiment have already made an impact on the broad field of \nexperimental nuclear physics. Being in i ts second decade of research\, PHENIX intends to expand its physics progra m\; thus consideration of possible upgrades has recently started. Calorime try detectors are expected to be part of the upgraded PHENIX in forward an d central regions. We consider a sampling detector that uses plastic scint illator tiles for future PHENIX hadronic calorimeters. The R&D program has commenced and\, as its first phase\, a reconfigurable sampling scintillat or prototype calorimeter is being fabricated. With its lateral active dete ction area of 35 cm x 35 cm\, the calorimeter will be capable of taking da ta with electron and hadron beams. The fabricated prototype calorimeter wi ll allow comprehensive test beam studies to research and optimize design a nd technical performance parameters of the possible future hadronic calori meter. In addition\, evaluated metrological limits and production costs wi ll be used in the technical design of PHENIX upgrades.\n\nhttp://indico.ce rn.ch/contributionDisplay.py?contribId=452&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=452&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Study of jet fragmentation with particle correlations in Pb-Pb col lision at 2.76 TeV by ALICE DTSTART;VALUE=DATE-TIME:20120815T152000Z DTEND;VALUE=DATE-TIME:20120815T154000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-409@cern.ch DESCRIPTION:Speakers: KRIZEK\, Filip (Helsinki Institute of Physics (FI))\ nA high-$p_{T}$ jet suppression first observed at RHIC has been reported a lso at the LHC.\nThe ALICE collaboration has recently reported an observat ion of an enhanced intra-jet yield of charged particles associated with th e high-\\pt{} trigger particle ($I_{\\rm AA}$) in central \\pbpb\\ collisi ons at \\snn=2.76 \\tev\\ which may be also interpreted as a hint of the modification of the fragmentation function due to induced gluon radiation. \nIn order to study further the nature of the intra-jet correlation yield enhancement an analysis of the jet-fragmentation transverse momentum was performed. Modification of this distribution with the centrality of the collision will be presented. A possible path length dependency of the indu ced radiation is studied using a comparison of the two-particle correlatio n for different orientations of the trigger particle with respect to the e vent plane and comparing the jet-fragmentation transverse momentum distrib ution measured in different event-by-event anisotropy classes.\n\nhttp:/ /indico.cern.ch/contributionDisplay.py?contribId=409&sessionId=52&confId=1 81055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=409&sessionId=5 2&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:${\\rm D^+}$ meson production in p-p and Pb-Pb collisions with the ALICE detector DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-408@cern.ch DESCRIPTION:Speakers: RUSSO\, Riccardo (Universita e INFN (IT))\nOpen heav y flavour hadrons produced in high-energy ion collisions are an interestin g tool to investigate the properties of the QCD medium\, as they come from the hadronization of heavy quarks which are created in the early stage of the interaction and which experience the whole collision history.\nEnergy loss of heavy quarks in the medium can be investigated by comparing the h eavy flavour production cross sections in p-p and nucleus-nucleus\ncollisi ons.\n\nThe measurement of ${\\rm D^+}$ production as a function of transv erse momentum in p-p and Pb-Pb collisions at $\\sqrt{s}_{NN}$ = 7 and 2.76 TeV respectively with the ALICE detector is presented. \n${\\rm D^+}$ mes ons are reconstructed from their $K^- \\pi^+ \\pi^+$ hadronic decay that c an be reconstructed in the central rapidity region using the tracking and PID detectors.\nCharm production cross sections in p-p collision is compar ed to pQCD predictions and the nuclear modification factor of ${\\rm D^+}$ is presented.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=4 08&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=408&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Lack of modifications in jet-like correlations from d+Au to Au+Au collisions for trigger particle p_T in both jet and hydrodynamic domains m easured by STAR DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-379@cern.ch DESCRIPTION:Speakers: PEI\, Hua (University of Illinois at Chicago)\nAngul ar correlations with respect to a back-to-back trigger pair of high-p_T ha drons with similar momenta (above 4 GeV/c) have shown no differences betwe en d+Au and Au+Au collisions suggesting tangential emission of selected di -jets. In this talk we increase the p_T threshold of the leading hadron in the pair (8\, 10 and 12 GeV/c) to vary the degree of the surface bias. Th e di-jet energy imbalance is assessed via the difference of total momenta in the same- minus away-side peaks\, and the measured imbalance is over-pr edicted by path-length dependent models\, while showing possible evidence of softening of jet fragmentation. We find no qualitative change in the sa me-side peak of 2+1 correlation.\n\nRemoving the back-to-back partner maxi mizing the asymmetry\, the 2+1 reduces to the ordinary dihadron correlatio n\, where significant modification is indeed observed on the away-side but the near-side remains similar between the d+Au and Au+Au events\, indicat ing surface bias. We further lower the trigger p_T to as low as 1.5 GeV/c\ , where hydrodynamic production of particles are thought to dominate and j et-like correlations are expected to diminish. However\, we find the ident ical near-side correlation between d+Au and Au+Au persists. The data canno t be described by the AMPT and HIJING models\, and challenge the particle production paradigm in relativistic heavy-ion collisions.\n\nhttp://indico .cern.ch/contributionDisplay.py?contribId=379&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=379&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:PHENIX $v_{2}$ measurement of single electrons from heavy flavor m eson decays in Au$+$Au collision at $\\sqrt{s_{NN}}$=62.4GeV and charm bea uty separation using VTX at 200GeV DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-371@cern.ch DESCRIPTION:Speakers: DING\, Lei (I)\nThe measurement of azimuthal anisotr opy $v_{2}$ of single electrons from semi$-$leptonic decay of open heavy f lavor mesons in PHENIX experiment has provided important understanding of the property of the quark gluon plasma\, especially the geometrical depend ence of partonic energy loss. PHENIX results of $v_{2}$ in Au$+$Au collisi on at $\\sqrt{s_{NN}}$=200GeV for heavy-flavor decays are comparable to th e $v_{2}$ measurements of other hadrons. This indicates that both the flow and the energy loss characteristics in heavy quarks are similar to light quarks\, which is not well understood. \n\nWe extend the PHENIX systematic study of azimuthal anisotropy by reducing the beam energy to $\\sqrt{s_{N N}}$=62.4GeV. At this energy\, the medium formed in Au$+$Au collisions is expected to have a lower energy-density. However\, we will show that the h eavy flavor electron $v_{2}$ at the lower beam energy is similar within th e experimental uncertainties to the higher beam energy result.\n\nAll the current PHENIX heavy flavor $v_{2}$ measurements are a mixture of charm a nd beauty. With the new detector - Silicon Vertex Tracker (VTX) installed in run11\, we are able to measure $v_{2}$ separately for charm and beauty . The status of $v_{2}$ measurements separating single electrons from semi $-$leptonic decay of D and B mesons using the VTX will be presented\n\nhtt p://indico.cern.ch/contributionDisplay.py?contribId=371&sessionId=37&confI d=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=371&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Viscous Corrections to Hadron Phase Space Distributions from linea rized Boltzmann Equation DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-370@cern.ch DESCRIPTION:Speakers: Mr. WOLFF\, Zachary (Purdue University)\nComparing h ydrodynamic simulations to data inevitably requires the \nconversion of th e fluid to particles. This conversion is ambiguous for viscous fluids as a n infinite class of phase space densities can produce the same hydrodynami c variables. We compute self-consistent phase space corrections for hadro n species by solving the linearized Boltzmann equation. These distribution functions are then used in the Cooper-Frye formalism to calculate observa bles such as spectra and anisotropic flow coefficients. The results are co ntrasted with those obtained using the ad hoc species-independent quadrati c momentum dependence (Grad ansatz) that is typically assumed in the liter ature.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=370&sessi onId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=370&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Femtoscopy of identified particles at STAR. DTSTART;VALUE=DATE-TIME:20120814T183500Z DTEND;VALUE=DATE-TIME:20120814T185500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-373@cern.ch DESCRIPTION:Speakers: SHAH\, Neha (UCLA)\, SHAH\, neha (University of Cali fornia Los Angeles)\nMeasurement of correlations of pair of particles with small relative momenta provides insight into geometry and lifetime of par ticle emitting source in relativistic heavy ion collisions.\n\nKaon femtos copy extends the range of pair transverse mass covered and provides a samp le less affected by decay resonances as compared to pions. The correlation functions of non-identical particles in the three-dimensional $\\vec{k}^* $ space can reveal a space-time offset of one particle species (e.g. kaons ) with respect to another (e.g. pions). Measurement of $\\Lambda-\\Lambda $ correlation is closely related to $H_{0}$-dibaryon\, a six quark state p redicted by Jaffe[1]\, which could appear as a bump in the $\\Lambda-\\Lam bda$ invariant mass spectra or depletion in pair correlation near the thre shold depending on the nature of $H_{0}$-dibaryon state.\n \nWe present ne w measurements of pion-kaon\, kaon-kaon and hyperon-hyperon correlations m easured in Au+Au collisions at the STAR experiment during Run 10 and Run 1 1. The analysis greatly benefits from the STAR Time of Flight detector to extend particle identification capabilities. Kaon source sizes are extract ed by using spherical harmonics decomposition technique. Dependence of the kaon source radii on event centrality and pair transverse momentum for $\ \sqrt{s_{NN}}$ = 7.7-200 GeV are presented. Centrality dependence of pion- kaon femtoscopy in at Au+Au $\\sqrt{s_{NN}}$ = 200 GeV and a similar analy sis for p+p collsions at $\\sqrt{s_{NN}}$ = 200 GeV will be presented for the first time. Finally\, we will present the measurement of $\\Lambda-\\L ambda$ correlations for $\\sqrt{s_{NN}}$ = 39-200 GeV. \n \n[1] R. L. Jaff e\,Phys. Rev. Lett. 38(1977) 195.\n\nhttp://indico.cern.ch/contributionDis play.py?contribId=373&sessionId=4&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=373&sessionId=4 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:A detailed study of open heavy flavor production\, enhancement\, a nd suppression at RHIC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-372@cern.ch DESCRIPTION:Speakers: DURHAM\, J. Matthew (Los Alamos National Laboratory) \nThe flexibility of the beam species available at the Relativistic \nHeav y Ion Collider has enabled the PHENIX Collaboration to examine \nopen heav y flavor production across a wide range of temperature\, \nenergy density\ , and system size. Charm and bottom production in \n$p+p$ collisions\, wh ich is dominated by gluon fusion\, is largely \nconsistent with FONLL pQCD calculations. New analysis techniques \nhave extended the momentum cover age and provide constraints on the \nbottom cross section. Measurements i n $d+$Au collisions exhibit a \nstrong cold nuclear matter Cronin enhancem ent of electrons from \n$D-$mesons\, which is roughly consistent with the mass-ordering \nobserved for the lighter $\\pi\, K\,$ and $p$ families. T his also \nshows that the nuclear baseline for interpreting Au+Au data cou ld be \nsignificantly modified from the $p+p$ shape. Collisions of Cu \nn uclei provide a crucial intermediary testing ground between the \nsmall $d $+Au collision system and the large Au+Au system\, and show \nhow the cold nuclear matter enhancement is overtaken by competing \nhot nuclear matter suppression as the system size increases towards \nthe most central Au+Au collisions. The status of finalizing these results results and others wi ll be discussed\, in the context of recent measurements at RHIC and the LH C.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=372&sessionId =37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=372&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Quarkonia production in the STAR experiment DTSTART;VALUE=DATE-TIME:20120814T193500Z DTEND;VALUE=DATE-TIME:20120814T195500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-375@cern.ch DESCRIPTION:Speakers: TRZECIAK\, Barbara (Warsaw University of Technology) \nThe suppression of quarkonia production in high energy nuclear collision s relative to proton-proton collisions\, due to the Debye screening of the quark-antiquark potential\, was proposed as a signature of the formation of Quark-Gluon Plasma. However\, there are other effects that may affect t he observed quarkonia production\, such as cold nuclear matter effects\, f inal state nuclear absorption and statistical coalescence of quark-antiqua rk pairs. Studies of production of various quarkonia states in heavy-ion c ollisions can provide insight into the properties of the hot and dense med ium created in relativistic heavy-ion collisions at RHIC. Systematic measu rement of the quarkonia production for different colliding systems\, centr alities and collision energies may help to understand the quarkonia produc tion mechanisms as well as the medium properties. Furthermore\, at RHIC en ergies the $\\Upsilon$ meson is a clean probe of the early system due to n egligible contributions from $b$-$\\bar{b}$ recombination and non-thermal suppression from co-mover absorption.\n\nIn this talk we will present resu lts on J/$\\psi$ and $\\Upsilon$ production via the dielectron decay chann el in Au+Au\, $d$+Au and $p+p$ collisions at midrapidity at $\\sqrt{s_{NN} }$ = 200 GeV in the STAR experiment. We will show the J/$\\psi$ nuclear mo dification factor as a function of centrality and $p_{T}$ and the $\\Upsil on$ nuclear modification factor computed using the new preliminary $p$+$p$ result from 2009\, in Au+Au and $d$+Au collisions. We will also present t he J/$\\psi$ polarization measurement in $p$+$p$ collisions and the J/$\\p si$ elliptic flow measurement in Au+Au collisions. Furthermore analysis st atus of J/$\\psi$ production in Au+Au collisions at 39 GeV and 62.4 GeV wi ll be reported.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId= 375&sessionId=5&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=375&sessionId=5 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Heavy quark potential at non-zero temperature and quarkonium spect ral functions DTSTART;VALUE=DATE-TIME:20120814T185500Z DTEND;VALUE=DATE-TIME:20120814T191500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-374@cern.ch DESCRIPTION:Speakers: PETRECZKY\, Peter (BNL)\nWe calculate different type s of Wilson loops of temporal size \nt 200MeV we supplement the calculated real part of the potential \nwith the imaginary part obtained in perturb ation theory and evaluate\nthe quarkonium spectral functions. We find that all quarkonium \nstates except the Upsilon(1S) melt at temperatures T>300 MeV.\nFinally from the obtained spectral functions we calculate the\nEucli dean correlation functions and compare them with available\nlattice data.\ n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=374&sessionId=5& confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=374&sessionId=5 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:chi_c measurement in PHENIX: the present and the future. DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-377@cern.ch DESCRIPTION:Speakers: Dr. LEBEDEV\, Alexandre (Iowa State University)\nMea surement of different quarkonia states is a well known\ntool for study of hot and dense matter produced in heavy ion\ncollisions.\n\nThe PHENIX expe riment at RHIC have successfully measured\nchi_c production in p+p and d+A u collisions at 200 GeV.\nThe chi_c decays were reconstructed through thei r decays to J/Psi+gamma.\nResults from the 2006 p+p and 2008 d+Au\ndataset s at 200GeV will be presented.\n\nThe accuracy and pT reach of these measu rements potentially can\nbe improved if one uses conversions of soft photo ns from\nchi_c decays to e+e- pairs. These pairs can be then detected by\n the VTX detector recently installed in PHENIX.\nWe present a simulation st udy of such measurement\, and\ncomparison to existing measurements.\n\nhtt p://indico.cern.ch/contributionDisplay.py?contribId=377&sessionId=37&confI d=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=377&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Welcome DTSTART;VALUE=DATE-TIME:20120813T123000Z DTEND;VALUE=DATE-TIME:20120813T130000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-700@cern.ch DESCRIPTION:Speakers: \nhttp://indico.cern.ch/contributionDisplay.py?contr ibId=700&sessionId=46&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=700&sessionId=4 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Energy for the 21st Century World Economy: Problems and Opportunit ies DTSTART;VALUE=DATE-TIME:20120814T230000Z DTEND;VALUE=DATE-TIME:20120815T000000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-618@cern.ch DESCRIPTION:Speakers: Prof. BAUER\, Wolfgang (Distinguished University Pro fessor\, Michigan State University)\nhttp://indico.cern.ch/contributionDis play.py?contribId=618&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=618&confId=1810 55 END:VEVENT BEGIN:VEVENT SUMMARY:The QCD Equation of State with 2+1 flavors of Highly Improved Stag gered Quarks DTSTART;VALUE=DATE-TIME:20120816T194000Z DTEND;VALUE=DATE-TIME:20120816T200000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-393@cern.ch DESCRIPTION:Speakers: BAZAVOV\, Alexei (B)\nThe physics of the Quark-Gluon Plasma (QGP)\, currently explored experimentally in heavy-ion collisions\ , is non-perturbative for temperatures below approximately 1 GeV. One of t he fundamental properties of the QGP\, the Equation of State\, is a subjec t of extensive studies in lattice QCD. The lattice QCD Equation of State i s now an essential requirement for the correct hydrodynamic modeling of he avy-ion collisions. Lattice QCD provides first-principle calculations with physical results recovered in the continuum limit. Thus\, understanding o f the discretization effects is of great importance. I report on recent pr ogress by the HotQCD collaboration in studying the 2+1 flavor Equation of State on lattices with the temporal extent Nt=6\, 8\, 10 and 12 in Highly Improved Staggered Quarks (HISQ) discretization scheme. In the low-tempera ture phase\, where the Hadron Resonance Gas (HRG) model is expected to be a good approximation\, a comparison of HRG and lattice results is also pre sented. Comparisons with Equation of State calculations with different fer mion actions will also be discussed.\n\nhttp://indico.cern.ch/contribution Display.py?contribId=393&sessionId=16&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=393&sessionId=1 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of charm and bottom yields in Au+Au collisions at PHE NIX DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-392@cern.ch DESCRIPTION:Speakers: AKIMOTO\, Ryohji (for the PHENIX collaboration) (Uni versity of Tokyo)\nHeavy quarks (charms and bottoms) are interesting probe s with which to study the properties of quark gluon plasma (QGP). Heavy qu arks are created by initial hard scatterings\, and thus are good probe to investigate the full time evolution of heavy ion collisions. Due to their heavy mass\, the energy loss within the QGP is expected to be different fo r heavy quarks than for light quarks. Therefore\, the measurement of heavy quark yields from heavy ion collisions leads to greater understanding of parton behavior inside QGP.\nWe installed the silicon vertex tracker (VTX) in the PHENIX detector in order to individually measure charm and bottom contributions to heavy flavor single electrons and have collected Au+Au in 2011 and p+p collision data in 2012. In this poster\, we present the stat us of charm and bottom yield measurements from the Au+Au collision data.\n \nhttp://indico.cern.ch/contributionDisplay.py?contribId=392&sessionId=37& confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=392&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The Emergent QCD Plasma from RHIC to LHC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-88@cern.ch DESCRIPTION:Speakers: LIAO\, Jinfeng (Indiana University & RIKEN BNL Resea rch Center)\nOne of the main discoveries at RHIC is the strongly coupled q uark-gluon plasma (sQGP)\, based particularly on the observed "perfect flu id" and strong jet quenching. One of the most interesting physics to see a t LHC is whether and how such sQGP properties will change. Based on the de ep and generic electric-magnetic duality\, we've suggested that the QCD pl asma contains the quarks and gluons (color-electric D.o.F) as well as the EMERGENT monopoles (color-magnetic D.o.F.) with the latter becoming domina nt at strong gauge coupling as in the near-Tc QCD plasma . An important pr ediction of this "magnetic scenario" is a RAPID turn-off of the magnetic d ominanace when increasing temperature beyond the near-Tc regime of 1-1.5T c\, accompanied by rapid decrease (due to non-perturbative running) of QCD coupling in this regime. \n\nThis scenario\, therefore\, implies the QCD plasma to be less perfect a fluid and more transparent a medium at LHC\, d espite only modest increase in tempearture. We will discuss such expected change of the emergent QCD plasma from RHIC to LHC energies. Furthermore\, we will examine the changes in the two most important medium properties: 1) evidences for a less perfect fluid from our molecular dynamics simulati ons as well as from other groups' hydrodynamic modelling of flow data at L HC\; 2) evidences for a more transparent medium as predicted from our anal ysis of geometric data for jet quenching and from other groups' modelling for LHC Raa data and extraction of jet quenching parameter at LHC. \n\nRe ference: arXiv:1109.0271[nucl-th]\; arXiv:1202.1047[nucl-th]\; Phys.Rev. C 84 (2011) 034904\; PRL102:202302\,2009\; PRL101:162302\,2008\; PRC75:05490 7\,2007.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=88&sess ionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=88&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:STAR measurements of centrality dependence of elliptic flow for id entified hadrons in Au + Au collisions at $\\sqrt{s_{NN}}$ = 200 GeV DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-145@cern.ch DESCRIPTION:Speakers: Dr. MASUI\, Hiroshi (LBNL)\nElliptic flow $v_2$ is o ne of the key observables to study the bulk properties at freeze-out as we ll as hadron production mechanisms in the ultra relativistic heavy ion col lisions. It has been observed that number of constituent quark (NCQ) scali ng of $v_2$ holds among measured identified hadrons at $\\sqrt{s_{NN}}$ = 62.4 and 200 GeV in Au + Au collisions at RHIC. The scaling of $v_2$ stron gly indicates that the collectivity develops at the stage where the parton ic degrees of freedom are relevant. Studying the NCQ scaling of $v_2$ as a function of transverse momentum $p_T$ and centrality will shed light on t he production mechanisms for hadrons in heavy ion collisions.\n\nWe presen t the results of $v_2$ as a function of $p_T$ for identified $\\pi^{\\pm}$ \, $K^{\\pm}$\, $K^0_S$\, $p$\, $\\bar{p}$\, $\\Lambda$ and $\\bar{\\Lambd a}$ in Au + Au collisions at $\\sqrt{s_{NN}}$ = 200 GeV. The NCQ scaling o f $v_2$ in several different centrality classes is discussed.\n\nhttp://in dico.cern.ch/contributionDisplay.py?contribId=145&sessionId=37&confId=1810 55 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=145&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:A QCD-like theory with the Z_{Nc} symmetry DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-397@cern.ch DESCRIPTION:Speakers: Dr. SAKAI\, Yuji (RIKEN)\nWe propose a QCD-like theo ry with the Z_{Nc} symmetry. The flavor-dependent twisted boundary conditi on (TBC) is imposed on Nc degenerate flavor quarks in the SU(Nc) gauge the ory. The QCD-like theory is useful to understand the mechanism of color co nfinement. Dynamics of the QCD-like theory is studied by imposing the TBC on the Polyakov-loop extended Nambu-Jona-Lasinio (PNJL) model. The Z_{Nc} symmetry is preserved below some temperature Tc\, but spontaneously broken above Tc. The color confinement below Tc preserves the flavor symmetry. A bove Tc\, the flavor symmetry is broken\, but the breaking is suppressed b y the entanglement between the Polyakov loop and the chiral condensate. Pa rticularly at low temperature\, dynamics of the TBC model is similar to th at of the PNJL model with the standard fermion boundary condition\, indica ting that the Z_{Nc} symmetry is a good approximate concept in the latter model even if the current quark mass is small. The present prediction can be tested in future by lattice QCD\, since the QCD-like theory has no sign problem.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=397&se ssionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=397&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Elastic scattering: The undersides of quarkonia propagation and co llectivity in the QGP DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-396@cern.ch DESCRIPTION:Speakers: BERREHRAH\, Hamza (Subatech)\nOne of the most advoca ted probes of the quark gluon plasma (QGP) properties is the $J/\\psi$ sup pression. However\, the comparison between experimental data and theoretic al scenarios is still rather inconclusive\, as several mechanisms might pa rticipate to explain the observed suppression (sequential suppression\, dy namical or statistical recombination\, formation time\,...)\, not to menti on the cold nuclear matter effects. In recent experimental studies at PHEN IX and STAR\, the $v_2$ of the $J/\\Psi$'s has been measured. In conjuncti on with $R_{AA}$\, this observable should improve our understanding of qua rkonia production in the QGP and puts higher constrains on models aiming a t describing the $J/\\psi$ suppression. However\, most of them neglect the possible diffusion of $Q\\bar{Q}$ correlations ("pre $J/\\psi$'s") in the QGP although it is \ngenerically an essential ingredient for the understa nding of the $v_2$ of all particles.\n\n Motivated by SPS results of $v_2^ {J/\\psi}$ and recent RHIC and LHC results suggesting a strong thermalizat ion of charm quarks in the medium\, our approach is focused not only on th e suppression phenomenon but also on the physical evolution of those corre lations\, including an original treatment of their diffusion in the QGP du e to their Compton scattering with gluons and the implications of such a d iffusion on $J/\\psi$ energy loss and collectivity\, studied in a hydrodyn amic transport model. The general tendency of our results indeed shows tha t elastic processes may have a non-negligible influence on the quarkonia p ropagation in the QGP.\n \n In our contribution\, we will discuss the theoretical framework we have developed to evaluate the elastic cross sect ion of $J/\\psi$'s (and more generally $\\Q\\bar{Q}$ correlations) by comb ining analytical calculations based on pQCD and results from lQCD. We will then address the quarkonia propagation under the influence of such collis ions\, treated in a Fokker-Planck approach\, and will present results dedu ced from our transport code MC@SHQ. Those results will be compared to rece nt STAR and PHENIX experiments at RHIC and predictions of $v_2^{J/\\psi}$ for LHC will be shown.\n\nhttp://indico.cern.ch/contributionDisplay.py?con tribId=396&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=396&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Parton energy loss and modified beam quark distribution functions in Drell–Yan process in p +A collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-395@cern.ch DESCRIPTION:Speakers: Mr. XING\, Hongxi (Institute of Particle Physics\, C entral China Normal University)\nWithin the framework of generalized colli near factorization in perturbative QCD (pQCD)\, we study the effect of ini tial multiple parton scattering and induced parton energy loss in Drell– Yan (DY) process in proton–nucleus collisions. We express the contributi on from multiple parton scattering and induced radiative energy loss to th e DY dilepton spectra in terms of nuclear modified effective beam (anti)qu ark distribution functions. The modification depends on the quark transpor t parameter in nuclear medium. This is similar to the final-state multiple parton scattering in deeply inelastic scattering (DIS) off large nuclei a nd leads to the suppression of the Drell–Yan cross section in p + A rela tive to p + p collisions. The modifications to (anti)quark distribution fu nctions from (anti)quark-antiquark double scattering are shown to be deter mined by the (anti)quark distribution density in the medium. The asymmetry in quark and antiquark distributions in nuclei will lead to different mod ifications of quark and antiquark distribution functions inside the beam h ardon. We also calculate DY spectra in p + A collisions and find the nucle ar suppression due to beam parton energy loss negligible at the Fermilab e nergy Elab = 800 GeV in the kinematic region as covered by the E866 experi ment. Most of the observed nuclear suppression of DY spectra in E866 exper iment can be described well by parton shadowing in target nuclei as given by the EPS08 parameterization. The effect of beam parton energy loss\, how ever\, becomes significant for DY lepton pairs with large beam parton mome ntum fraction or small target parton momentum fraction.\n\nhttp://indico.c ern.ch/contributionDisplay.py?contribId=395&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=395&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Higher moments of Net Kaon multiplicity distributions at RHIC ener gies for the search of QCD Critical Point DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-394@cern.ch DESCRIPTION:Speakers: SARKAR\, amal (Indian Institute of Technology\, Mumb ai)\nThe Relativistic Heavy-Ion Collider (RHIC) \, at BNL\, has started its beam energy scan program by colliding high energy heavy-ions c orresponding to baryonic chemical potentials within the range of 20 - 5 50 MeV. One of the main goals of this beam energy scan program is to locat e the critical point which is postulated to lie at the end of the phase transition boundary between partonic and hadronic matter. Calculations o n the lattice predict that the higher moments (such as standard deviatio n (σ)\, skewness (S) and kurtosis (k)) of the multiplicity distribution of the conserved quantities like the net-charge\, net-baryon\, net-st rangeness are related to the corresponding susceptibi-lities and the corr elation length of the system\, presence of a Critical Point might result i n divergences of the thermodynamic susceptibilities and correlation length s. \n\nHere we report the measurements of the various moments (standard d eviation (σ)\, skewness (S) and kurtosis (k)) and their products (kσ2\, Sσ) of the net kaon multiplicity measured by the STAR detector at mid-rap idity for Au+Au collisions at 7.7-200 GeV center of mass energies. The ene rgy and centrality dependence of higher moments and their products (such a s Sσ and Kσ2) will be presented. Theoretical calculation\, containing th e non-CP physics from the HIJING models will be compared to the data.\n\nh ttp://indico.cern.ch/contributionDisplay.py?contribId=394&sessionId=37&con fId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=394&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:High transverse momentum quarkonium production and dissociation in heavy ion collisions DTSTART;VALUE=DATE-TIME:20120814T220500Z DTEND;VALUE=DATE-TIME:20120814T222500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-83@cern.ch DESCRIPTION:Speakers: Dr. SHARMA\, Rishi (TRIUMF)\nWe calculate the yields of quarkonia in heavy ion collisions at RHIC and the LHC as a function of the transverse momentum. We focus on the consistent implementation of dy namically calculated nuclear matter effects\, such as coherent power corre ctions\, cold nuclear matter energy loss\, and the Cronin effect in the in itial state\, and collisional dissociation of quarkonia in the final state as they traverse through the QGP. This formalism has been previously used to successfully describe the phenomenology of open heavy flavor (B and D mesons) both at RHIC and the LHC. We will briefly review the comparison wi th new open heavy flavor data and describe the extension of the calculatio n for quarkonium production. Based upon non-relativistic quantum chromody namics\, our calculations include both color-singlet and color-octet contr ibutions and feed-down effects from excited states. Theoretical results ar e presented for $J/\\psi$ and $\\Upsilon$ and compared to experimental da ta where applicable. At RHIC\, a good description of the high-$p_T$ $J/\\p si$ modification observed in central Cu+Cu and Au+Au collisions can be ac hieved within the model uncertainties. We find that $J/\\psi$ measurements in proton(or deuteron)-nucleus reactions are needed to constrain the magn itude of cold nuclear matter effects\, and new data from d+Au collisions a t RHIC already puts a strong limit on the Cronin enhancement for $J/\\psi$ . At the LHC\, a good description of the experimental data can be achiev ed only in mid-central and peripheral Pb+Pb collisions. The large five-fol d suppression of prompt $J/\\psi$ in the most central nuclear reactions s uggests the presence of thermal effects at the level of the quarkonium wav efunction\, even at large transverse momentum.\n\nhttp://indico.cern.ch/co ntributionDisplay.py?contribId=83&sessionId=50&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=83&sessionId=50 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Transition From Ideal To Viscous Mach Cones In A Kinetic Transport Approach DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-80@cern.ch DESCRIPTION:Speakers: BOURAS\, Ioannis (University of Frankfurt a.M.)\nUsi ng a microscopic transport model we investigate the evolution of conical s tructures originating from the supersonic projectile moving through the ho t matter of ultrarelativistic particles. Using different scenarios for the interaction between projectile and matter\, and different transport prope rties of the matter\, we study the formation and structure of Mach cones. Especially\, a dependence of the Mach cone angle on the details and rate o f the energy deposition from projectile to the matter is investigated. Fur thermore\, the two-particle correlations extracted \nfrom the numerical ca lculations are compared to an analytical approximation. We find that the p ropagation of a high energetic particle through the matter does not lead t o the appearance of a double peak structure as observed in the ultrarelati vistic heavy-ion collision experiments. The reason is the strongly forward -peaked energy and momentum deposition in the head shock region. In additi on\, by adjusting the cross section we investigate the\ninfluence of the v iscosity to the structure of Mach cones. A clear and unavoidable smearing of the profile depending on a finite ratio of shear viscosity to entropy d ensity is clearly visible.\n\nhttp://indico.cern.ch/contributionDisplay.py ?contribId=80&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=80&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Upsilon suppression in PbPb collisions at LHC energies DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-81@cern.ch DESCRIPTION:Speakers: WOLSCHIN\, Georg (Heidelberg University)\nWe suggest that the combined effect of screening\, gluon-induced dissociation\, Land au damping\, and reduced feed-down explains most of the suppression of Y s tates that has been observed by CMS [1] in PbPb relative to pp collisions at sqrt(s_NN) = 2.76 TeV at the CERN LHC. The suppression is thus a clear\ , albeit indirect\, indication for the presence of a qgp.\n\nIn particular \, we calculate the suppression of both the Y(1S) ground state in the quar k-gluon plasma in minimum-bias PbPb collisions\, and of the Y(2S + 3S) sta tes relative to the ground state. In a major extension of our schematic ph enomenological approach presented in [2\n\nhttp://indico.cern.ch/contribut ionDisplay.py?contribId=81&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=81&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:High-Energy Nuclear Collisions and the QCD Phase Structure DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-86@cern.ch DESCRIPTION:Speakers: Prof. LIU\, Feng () College of Physical Science and Technology\, Central China Normal University\, Wuhan\, 430079\, China)\nO ne of the most exciting goals for the field of high-energy nuclear collisi ons is to understand the phase structure of matter with partonic degrees o f freedom especially the transition from hadronic phase to partonic phase\ , the quark-gluon plasma (QGP). It is believed that the QGP phase dominate s the evolution briefly during the early time of the Universe. In high-en ergy nuclear collisions at RHIC\, the new form of matter\, strongly intera ction quark-gluon plasma (sQGP)\, has been formed [1]. The question now is what is the structure of the QCD phase diagram.\n\nIn this talk\, we will report a systematic study of the freeze-out properties and collectivities as a function of collision energies. These studies were performed with th e AMPT and URQMD models. The region where the hadronic interaction dominan t in the QCD phase diagram will be identified within the model studies. \n \nReferences:\n[1] J. Adams\, et al.\, STAR Collaboration\, Nucl. Phys. A7 57\, 102(2005)\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=8 6&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=86&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Jet probes of cold and hot QCD matter DTSTART;VALUE=DATE-TIME:20120815T135000Z DTEND;VALUE=DATE-TIME:20120815T141000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-87@cern.ch DESCRIPTION:Speakers: Prof. ZHANG\, Ben-Wei (Central China Normal Universi ty)\nParton energy loss in the hot QCD medium will manifest itself not onl y in leading hadron spectra but also in reconstructed jet productions in h igh-energy nucleus-nucleus collisions. With its more differential power fu ll jets in heavy-ion collisions can then provide excellent tools to study the properties of the QGP and impose constraints on different parton energ y loss models.\n\nWith this motivation\, we investigate the cold nuclear m atter(CNM) effects on jet productions in high-energy nuclear collisions at LHC with the NLO perturbative QCD. The nuclear modifications for dijet an gular distributions\, dijet invariant mass spectra\, dijet transverse mome ntum spectra and dijet momentum imbalance due to CNM effects are calculate d by incorporating EPS\, EKS\, HKN and DS parametrization sets of parton d istributions in nucleus. It is found that dijet angular distributions and dijet momentum imbalance are insensitive to the initial-state CNM effects and thus provide optimal tools to study the final-state hot QGP effects su ch as jet quenching. \n\nFurthermore we present the results and prediction s at NLO for productions of the single\, double and tagged jets in relativ istic heavy-ion collisions by including parton energy loss effect in the Q GP and the CNM effects. We demonstrate how an enhanced di-jet transverse m omentum imbalance in central Pb+Pb reactions at the LHC\, recently measure d by the ATLAS and CMS experiments\, can be derived from these results. We show quantitatively that a significant fraction of this enhancement may b e related to the ambiguity in the separation between the jet and soft back ground medium and point to a suite of measurements that can help build a c onsistent picture of parton shower modification in heavy ion collisions at the LHC.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=87&ses sionId=12&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=87&sessionId=12 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Quark-gluon plasma shear viscosity at RHIC and the LHC: results fr om the hybrid model VISHNU DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-84@cern.ch DESCRIPTION:Speakers: SONG\, Huichao (The Ohio State University)\nViscous hydrodynamic calculations have shown that the quark-gluon plasma (QGP) she ar viscosity can be extracted from elliptic and triangular flow data [1]. However\, strong non-equilibrium effects\, both in the chemical compositio n and the kinetic evolution\, during the hadronic stage influence the deve lopment and distribution of flow anisotropy and must be correctly accounte d for when extracting the QGP viscosity. For an improved description of th e hadronic evolution\, we developed the hybrid model VISHNU which couples viscous hydrodynamic expansion of a QGP fluid to a microscopic description of hadronic rescattering and chemical and thermal freeze-out using the Ur QMD cascade [2]. In this talk\, we will summarize a number of key results obtained with VISHNU:\n\na) We present a robust method for extracting the QGP viscosity from the collision centrality dependence of the eccentricity -scaled charged hadron elliptic flow [3].\n\nb) We extract the QGP shear viscosity at RHIC energies from elliptic flow data\, giving quantitative e stimates for and initial pre-equilibrium flow and from model ambiguities o f the initial fireball eccentricity. We discuss the prospects for reducing the main uncertainties from initial conditions through a combined analysi s of elliptic\, triangular and higher-order harmonic flow coefficients usi ng event-by-event VISHNU simulations.\n\nc) We show that\, with the QGP vi scosity extracted in [3]\, VISHNU yields an excellent description of all s oft-hadron data from Au+Au collisions at top RHIC energy [4].\n\nd) Extrap olating to Pb+Pb collisions at the LHC\, and comparing with recent experim ental results from the ALICE Collaboration\, we show that the LHC data are again well described by VISHNU\, with\napproximately the same constant QG P viscosity as at RHIC energies [5]\, including the proton elliptic flow i n the most central collisions which cannot be correctly reproduced in a pu rely hydrodynamic approach [6].\n\ne) Using an improved implementation of baryon-antibaryon annihilation in UrQMD\, VISHNU is shown to resolve the ` `proton puzzle" at the LHC [7].\n\n\nReferences\n\n[1]H. Song and U. Heinz \, Phys. Lett. B 658\, 279 (2008)\; Phys. Rev. C77\, 064901 (2008)\, Z. Q iu\, C. Shen and U. Heinz\, Phys. Lett. B 707\, 151 (2012).\n\n[2]H. Song \, S. Bass and U. Heinz\, Phys. Rev. C83\, 024912 (2011).\n\n[3]H. Song\, S. Bass\, U. Heinz\, T. Hirano and C. Shen\, Phys. Rev. Lett. 106\, 19230 1 (2011).\n\n[4]H. Song\, S. Bass\, U. Heinz\, T. Hirano and C. Shen\, Phy s. Rev. C83\, 054910 (2011).\n\n[5]H. Song\, S. Bass and U. Heinz\, Phys. Rev. C83\, 054912 (2011)\; U.Heinz\, C. Shen and H. Song\, arXiv:1108.5323 [nucl-th].\n\n[6]C. Shen\, U. Heinz\, P. Huovinen and H. Song\, Phys. Rev . C84\, 044903 (2011).\n\n[7] H. Song\, S. Bass and U. Heinz\, in preparat ion.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=84&sessionI d=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=84&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Anisotropic optical response of dense quark matter under rotation - compact stars as cosmic polarizers - DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-85@cern.ch DESCRIPTION:Speakers: Mr. HIRONO\, Yuji (The University of Tokyo)\nQuantum vortices in the color-flavor locked (CFL) phase of QCD have bosonic degre es of freedom localized on them\, called the orientational zero modes. We show that the orientational zero modes are electromagnetically charged. As a result\, a vortex in the CFL phase nontrivially interacts with photons. We show that a lattice of vortices acts as a polarizer of photons with wa velengths larger than some critical length.\n\nhttp://indico.cern.ch/contr ibutionDisplay.py?contribId=85&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=85&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:New method for measuring longitudinal fluctuations and directed f low in ultrarelativistic heavy ion collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-584@cern.ch DESCRIPTION:Speakers: EYYUBOVA\, Gyulnara (University of Oslo (NO))\nRecen tly significant effort is made to study azimuthal flow asymmetries in ultr a-relativistic heavy ion reactions. At finite impact parameters the direct ed flow and the elliptic flow were dominant observables for many years.\n\ nIn head-on collisions there would be no reason to have an azimuthal or lo ngitudinal asymmetry\, nevertheless\, new observations for the higher harm onics show [1] that even in central collisions there is a strong azimuthal asymmetry in the emitted hadrons\, and this asymmetry arises from transve rse fluctuations of the initial state. In addition in head-on collisions t he third harmonic of the azimuthal distribution\, v_3\, exceeds the second one\, v_2\, and becomes the dominant harmonic component in accordance wit h large fluctuations. The fact that high harmonics\, measured up to v_8\, survive the fluid dynamical expansion indicates that the QGP fluid is almo st perfect\, and does not absorb high-harmonics.\n\nFluctuations must also appear in the longitudinal direction\, especially in peripheral reactions where the projectile and target spectators may not be exactly the same si ze. As a first step of our study\, we estimate the Event-by-Event (EbE) c. m. rapidity fluctuations using a method based on Zero Degree Calorimeters (ZDC)s. In peripheral reactions one can check if significant correlation b etween the EbE c.m. rapidities measured in the TPC and via the ZDCs do exi st. This then leads to the possibility to separate the flow characteristic s arising from collective global asymmetries and from random fluctuations. \n\nThe first v_1 measurements at LHC [2] were also arising dominantly fro m random fluctuations as both the even and odd rapidity combinations gave the same result. As a second step\, with the aim to determine the global a symmetry component of the directed flow v_1\, we propose that the particip ant system Event-by-Event shifted from the Lab. c.m. frame to the measurab le participant c.m. rapidity EbE\, thus removing or minimizing the effect of random longitudinal fluctuations. Then following the global asymmetry t he "odd" component of the directed flow can be separated and identified us ing this method.\n\nThis new method [3] enables us to separate fluctuating and the global symmetry components in the flow\, which is important for t he odd harmonics\, especially for v_1 and v_3. Thus one can study experime ntally the rotation effect [4] and the possible occurrence of the Kelvin-H elmholtz instability [5] in the globally symmetric component of the collec tive flow.\n\n[1] K. Aamodt et al.\, (ALICE Collaboration) Phys.Lett. B708 \, 249 (2012).\n[2] I. Selyuzhenkov et al. (ALICE Collaboration)\, J Phys. G 38\, 124167 (2011).\n[3] L.P. Csernai\, G. Eyyubova\, V.K. Magas\, arXi v:submit/0463514.\n[4] L.P. Csernai\, V.K. Magas\, H. Stöcker\, D.D. Stro ttman\, Phys.Rev. C84\, 02914 (2011).\n[5] L.P. Csernai\, D.D. Strottman\, and Cs. Anderlik\, arXiv:1112.4287 [nucl-th].\n\nhttp://indico.cern.ch/co ntributionDisplay.py?contribId=584&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=584&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Role of chaoticity and information entropy in Multiparticle produc tion at collider experiments DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-588@cern.ch DESCRIPTION:Speakers: Dr. DAS\, Supriya (Bose Institute)\nRecent data from LHC has revived the question whether the matter produced in high energy h adronic collisions is thermalized or not. With the published data from ALI CE and CMS experiments\, we have shown that the multi-particle production in p+p collisions at LHC energies available up to now\, follows the scalin g of information entropy if one takes the chaotic and coherent sources of particle production into account and the information entropy is extracted from the chaotically produced particles. Based on these scaling properties we have argued that in hadronic collisions at the highest energies projec ted for LHC\, almost all the particles will be produced chaotically. This indicates that a collective behavior will be observed even in the hadron-h adron collisions at that energy. Further connections of this study with he avy ion interactions will be elucidated.\n\nhttp://indico.cern.ch/contribu tionDisplay.py?contribId=588&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=588&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Lattice QCD thermodynamics in the presence of the charm quark DTSTART;VALUE=DATE-TIME:20120816T190000Z DTEND;VALUE=DATE-TIME:20120816T192000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-244@cern.ch DESCRIPTION:Speakers: Dr. RATTI\, Claudia (Torino University)\nWe present our estimate for the charm quark's contribution to\nthe equation of state and to the fluctuations of conserved charges.\nOur results are based on si mulations with dynamical charm at\nphysical quark masses. We also address the question\, to what extent\nstaggered simulations are reliable. We give comparisons with the Wilson\nformulation as well as with results using dy namical overlap fermions.\n\nhttp://indico.cern.ch/contributionDisplay.py? contribId=244&sessionId=16&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=244&sessionId=1 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Monte Carlo simulation studies of the elastic energy loss of high- energy gluons and light quarks in a strongly interacting medium DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-246@cern.ch DESCRIPTION:Speakers: AUVINEN\, Jussi (University of Jyväskylä)\nA stron g suppression of heavy-flavor hadrons has been seen in ultrarelativistic h eavy ion collisions at BNL-RHIC and CERN-LHC. This surprising result has c hallenged the view of gluon radiation dominating over elastic 2-to-2 proce sses as a cause of parton energy loss in a quark-gluon plasma. To study th e effectiveness of elastic collisions as the suppression mechanism in deta il\, we have developed a sophisticated Monte Carlo simulation describing t he non-eikonal propagation of high-energy gluons and light quarks interact ing with the quarks and gluons from the expanding QCD medium. The partonic collision rates are computed in leading-order perturbative QCD\, while fo ur different scenarios are used to model the QCD medium: 1) a simple stati c model for case studies of energy loss probability distributions\; 2) (1+ 1)-dimensional hydro with initial conditions from the EKRT model for model ing the central heavy ion collisions\; 3) (2+1)-dimensional hydro with a s mooth sWN profile obtained from the optical Glauber model for non-central collisions\; and 4) event-by-event hydro with an eBC profile from the Mont e Carlo Glauber model for a detailed study of the initial state density fl uctuation effects.\n\nWe compare our results with the neutral pion suppres sion observed in sqrt(s_NN)=200 GeV Au+Au collisions at RHIC and charged h adron suppression in sqrt(s_NN)=2.76 TeV Pb+Pb collisions in the LHC. We f ind that a model with purely incoherent collisions is not supported by the experimental data. In addition\, the initial state density fluctuations a re not observed to have a significant effect on the elastic energy loss.\n \nhttp://indico.cern.ch/contributionDisplay.py?contribId=246&sessionId=37& confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=246&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Jet shapes in 2.76 TeV PbPb collisions with CMS DTSTART;VALUE=DATE-TIME:20120818T134000Z DTEND;VALUE=DATE-TIME:20120818T135000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-241@cern.ch DESCRIPTION:Speakers: Ms. MAO\, Yaxian (Vanderbilt University (US))\nThe p oster presents jet shapes\, defined as the fractional transverse momentum distribution as a function of the distance r from the jet axis\, where the jets are reconstructed by the anti-kT clustering algorithm. We determine the energy flow inside the jet by using particles reconstructed and calibr ated using the Particle Flow algorithm. Different background subtraction m ethods are employed to subtract the energy not associated with the jet. Th e reconstructed jet shapes are corrected to the particle level using unfol ding functions determined from PYTHIA+HYDJET Monte Carlo simulation. The m odifications of the jet shapes due to parton-medium interactions can be st udied by comparing the measurements in PbPb collision to the baseline meas urements in pp collisions.\n\nhttp://indico.cern.ch/contributionDisplay.py ?contribId=241&sessionId=29&confId=181055 LOCATION:Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=241&sessionId=2 9&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Azimuthal anisotropy harmonics in ultra-central PbPb collisions at 2.76 TeV from the CMS experiment DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-242@cern.ch DESCRIPTION:Speakers: LI\, Wei (MIT)\nAzimuthal anisotropy harmonics have been measured in ultra-central PbPb \ncollisions at a center-of-mass energ y per nucleon pair of 2.76 TeV. Top central 0.2\\% PbPb collisions \nhave been collected using a unique trigger on total energy at forward \nhadroni c calorimeter and total multiplicity of hits on pixel tracker by \nthe CMS experiment during 2011 LHC PbPb run. A total of about 1.8 million \nevent s were recorded with top 0.2\\% collision centrality. Fourier flow \nharmo nics ($v_n$) are extracted from Fourier decomposition of long-range dihadr on correlations\nas a function of particle transverse momentum. The relati ve ratio of different $v_n$ provides a direct constraint on the \neta/s of the QGP matter\, independent of the initial condition models.\n\nhttp://i ndico.cern.ch/contributionDisplay.py?contribId=242&sessionId=37&confId=181 055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=242&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:R_CP and R_AA Measurements of Identified and Unidentified Charged Particles at High p_T in Au+Au Collisions at 7.7\, 11.5\, 19.6\, 27\, 39\, and 62.4 GeV in STAR DTSTART;VALUE=DATE-TIME:20120816T190000Z DTEND;VALUE=DATE-TIME:20120816T192000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-249@cern.ch DESCRIPTION:Speakers: SANGALINE\, Evan (UC Davis)\nThe suppression of high $p_{T}$ hadrons in 200 GeV Au+Au collisions at RHIC has been seen as a si gnature for a partonic medium being formed. The evolution of this key QGP signature is a powerful tool for studying the QCD phase structure in the R HIC Beam Energy Scan (BES). In this talk\, we will present measurements of identified $\\pi^{\\pm}$\, $K^{\\pm}$\, and $p(\\bar{p})$ and unidentifie d charged particles in Au+Au collisions at $\\sqrt{s_{NN}}=$7.7\, 11.5\, 1 9.6\, 27\, 39\, and 62.4 GeV. We will report nuclear modification factors $R_{CP}$ and $R_{AA}$ where published p+p references are available. These results offer insight into the $\\sqrt{s_{NN}}$ dependence of high $p_{T}$ suppression in nuclear collisions.\n\nhttp://indico.cern.ch/contributionD isplay.py?contribId=249&sessionId=17&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=249&sessionId=1 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Event-by-event distribution of azimuthal asymmetries in ultrarelat ivistic heavy-ion collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-248@cern.ch DESCRIPTION:Speakers: Dr. NIEMI\, Harri (University of Jyväskylä\, Depar tment of Physics)\nNowadays\, relativistic dissipative fluid dynamics is a common tool to\ndescribe the space-time evolution of the quark-gluon plas ma (QGP) \ncreated in ultrarelativistic heavy-ion collisions. The validity of the fluid-dynamical approach is experimentally confirmed by the fact t hat\ninitial-state anisotropies are directly converted into nonvanishing\n (event-averaged) Fourier coefficients $\\langle v_n \\rangle$ of the \ndec omposition of the single-inclusive momentum distribution of hadrons\nwith respect to the azimuthal angle. From the magnitude of the $\\langle v_n \\ rangle$ one can obtain information about the size of dissipative correctio ns and thus infer the value of the viscous coefficients of the QGP.\n\nIt has been realized that\, for a proper comparison to experimental data\nand a reliable extraction of viscosity\, fluid-dynamical calculations have to be performed on an event-by-event basis. Therefore\, fluid dynamics shoul d not only be able to predict the correct event-averaged $\\langle v_n\\ra ngle$\, but also their distributions. In this paper\, we investigate the e vent-by-event distribution of the initial-state eccentricities $\\varepsil on_n$\, and show how they correlate with the event-by-event distribution o f the Fourier coefficients $v_n$. In order to generate the initial state\, we use the Monte-Carlo Glauber model of Ref.\\ [1]. For the fluid-dynamic al evolution\, we use the model of Refs.\\ [2]. The final hadron spectra a re calculated with the Cooper-Frye freeze-out procedure.\n\nWe demonstrate that the event-by-event distributions of the $v_n$\,\nand not only their average values\, are promising observables to \ngain information about the initial state of the fluid-dynamical evolution and the transport properti es of the hot and dense\, strongly interacting matter created in heavy-ion collisions.\n\n[1] H.~Holopainen\, H.~Niemi\, and K.~J.~Eskola\,\nPhys.\\ Rev.\\ {\\bf C83}\, 034901 (2011)\, \n[arXiv:1007.0368 [hep-ph]].\n\n[2] H.~Niemi\, G.~S.~Denicol\, P.~Huovinen\, E.~Molnar\, and D.~H.~Rischke\,\n Phys.\\ Rev.\\ Lett.\\ {\\bf 106}\, 212302 (2011)\, \n[arXiv:1101.2442 [n ucl-th]]\;\nH.~Niemi\, G.~S.~Denicol\, P.~Huovinen\, E.~Molnar and D.~H.~R ischke\, \narXiv:1203.2452 [nucl-th].\n\nhttp://indico.cern.ch/contributi onDisplay.py?contribId=248&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=248&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Relics of Quark Hadron Phase Transition in the Microsecond Univers e with a “little inflation” DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-519@cern.ch DESCRIPTION:Speakers: SINHA\, Bikash ()\nThe conventional scenario to date of the quark hadron phase transition in the microsecond old universe is e ssentially guided by lattice calculation leading to a cross over from quar ks to hadrons.\n\n However\, it is entirely possible that Affleck – Dine mechanism of baryogenesis leading to a large baryon asymmetry is more nat ural than in other models along the route baryogenesis via leptogenesis. I n this model [1] the universe is assumed to begin with a large baryon che mical potential through an Affleck – Dine mechanism and then undergoes a “little (or tepid) inflation” after crossing the QCD first-order phas e transition line\, while remaining in a deconfined and a chirally symmetr ic phase. We exploit first order phase transition [2] and examine critical ly what could be the relics. Candidates such as “Strange Quark Nuggets ” (SQN)\, even Dark energy and floating “orphan” quarks are going to be discussed.\n\n[1] T. Boeckel and J. Schaffner – Bielich Phys. Rev. Letts 105\, 041301 (2010).\n[2] P. Bhattacharya\, J. Alam\, S. Raha and B. Sinha\, Phys. Rev. D 48\, 4630 (1993) \n A. Bhattacharya\, J. Alam. S. Sarkar\, P. Roy\, B. Sinha\, S. Raha and \n P. Bhattacharya\, Phys . Rev. D 61\, 093509 (2000)\n\nhttp://indico.cern.ch/contributionDisplay.p y?contribId=519&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=519&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The universality of eta/s DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-518@cern.ch DESCRIPTION:Speakers: SINHA\, Bikash ()\nALICE\, ATLAS and CMS detectors a t LHC and previously PHENIX and STAR detectors at RHIC have provided\ncomp elling evidence for higher order flow components apart from the elliptic f low v2. It is by now well established that\nboth RHIC and LHC have produce d a ”perfect fluid” of Quark Gluon Plasma with eta/s close to zero\, a s predicted by\nAdS/CFT limit. One expects that higher order harmonics and in particular triangular flow v3 will constrain eta/s more\nprecisely. Al though\, the particle density per participant pair at 2.76 TEV (LHC) is a factor of \n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=518&s essionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=518&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:A No-Go Theorem for Critical Phenomena in QCD at finite temperatur e and density DTSTART;VALUE=DATE-TIME:20120817T180000Z DTEND;VALUE=DATE-TIME:20120817T182000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-511@cern.ch DESCRIPTION:Speakers: Dr. HIDAKA\, Yoshimasa (RIKEN Nishina Center)\nWe di scuss the phase diagram of quantum chromodynamics (QCD) at finite T and fi nite quark chemical potential \\mu. In particular\, we focus on the QCD cr itical point(s)\, which has attracted considerable attention in its search at the relativistic heavy ion collision experiments. However\, not only t he location\, but even the existence has not yet been settled. In this ta lk\, we show that the critical points are forbidden in flavor-symmetric QC D at finite \\mu for any nonzero quark mass\, as long as the coordinate (T \, \\mu) is outside the pion condensed phase in the corresponding phase di agram of QCD at finite isospin chemical potential \\mu_I = 2\\mu\, if the two and higher quark loops are negligible in the thermodynamic potential a nd the correlation functions (The large-Nc QCD naturally satisfies this co ndition).\n\nReference\nY. Hidaka and N. Yamamoto\, Phys. Rev. Lett.108\, 121601 (2012).\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=5 11&sessionId=24&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=511&sessionId=2 4&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Jet measurements in proton-proton collisions at sqrt(s) = 7 TeV wi th ALICE experiment DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-510@cern.ch DESCRIPTION:Speakers: VAJZER\, Michal (Acad. of Sciences of the Czech Rep. (CZ))\nCollimated sprays of particles associated with hard partons\, jets \, are an important tool in testing QCD and probing the hot and dense nucl ear matter created in high energy heavy-ion collisions. Jets enable to stu dy hard scattering\, fragmentation and hadronisation and their modificatio n in presence of a partonic medium with respect to baseline vacuum measure ments with proton-proton collisions.\nWe have analysed data from proton-pr oton collisions at sqrt(s) = 7 TeV measured by ALICE and reconstructed the inclusive spectra of charged particle jets at mid-rapidity using k_t and anti-k_t clustering algorithms. We will present the jet spectra corrected for detector effects using unfolding and the unfolding procedure will be d iscussed in detail. We will examine various properties of jets\, such as t heir charged particle multiplicity or jet shapes\, with comparison to theo retical predictions.\n\nhttp://indico.cern.ch/contributionDisplay.py?contr ibId=510&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=510&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Exclusive photoproduction of rho0 mesons in ultra-peripheral Pb-Pb collisions at sqrt(s_NN) = 2.76 TeV DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-513@cern.ch DESCRIPTION:Speakers: MAYER\, Christoph (Polish Academy of Sciences (PL))\ nThe strong electromagnetic fields generated in the collision of Pb ions a t the LHC allow photon-photon and photonuclear interactions to be studied in a kinematic regime unexplored so far. The exclusive photoproduction of vector mesons was studied with the ALICE detector in ultra-peripheral PbPb collisions\, where the impact parameter is larger than the sum of the nuc lear radii and hadronic interactions are strongly suppressed.\n\nA data sa mple corresponding to about 3.6 microb^-1 was collected during the 2010 LH C heavy-ion run at an energy sqrt(s_NN) = 2.76 TeV using triggers that sel ect ultra-peripheral collisions.\n\nIn this data sample\, Rho0 photoproduc tion at mid-rapidity corresponds to a photon-nucleon center of mass energy of 45 GeV\, about 4 times higher than in previous experiments. The cross section for exclusive rho0 production was measured\, and the relative cont ributions to the invariant mass distribution from resonant and non-resonan t processes was evaluated.\n\nThe results are compared to calculations wit h different theoretical models.\n\nhttp://indico.cern.ch/contributionDispl ay.py?contribId=513&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=513&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Baryon anomaly in heavy-ion collisions and colour correlations in QGP DTSTART;VALUE=DATE-TIME:20120815T154000Z DTEND;VALUE=DATE-TIME:20120815T160000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-512@cern.ch DESCRIPTION:Speakers: SAFARIK\, Karel (CERN)\nA baryon anomaly – an incr ease baryon-to-meson production ratio at intermediate transverse momenta i n heavy-ion collisions when compared to proton–proton collisions – is observed at RHIC and the LHC. This effect is usually explained by recombin ation of constituent quarks during QGP hadronisation\, or as a consequence of a strong radial flow developed during the heavy-ion collision. In this contribution\, a different mechanism to favour baryon-over-meson producti on is proposed: when hadrons are formed in the recombination of nearby qua rks and antiquarks\, only colour-singlet combinations can be chosen. Hadro n formation\, in particular the probability to create baryons or mesons\, depends on the distribution of colour charges among quarks. If the distrib ution is random – a reasonable assumption for Quark–Gluon Plasma (QGP) – the baryon-to-meson ratio is nearly twice higher than in the situatio n where quark colours are pre-arranged to obtain a white hadron in the com bination of nearest quarks and antiquarks. The correlation of colour charg es in the QGP also influences the distance over which recombination occurs . A study of the dependencies of the baryon-to-meson ratio and of the size of the recombination domain on the colour-correlation configuration will be presented.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=51 2&sessionId=51&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=512&sessionId=5 1&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Charm production in the early phase and the charm baryon-to-meson ratios at LHC energies DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-515@cern.ch DESCRIPTION:Speakers: LEVAI\, Peter (Hungarian Academy of Sciences (HU))\n The charm quark production will be reasonably large at LHC energies\, both in p+p and Pb+Pb collisions. In heavy ion collisions even quark coalescen ce channels will strongly influence the charmed baryon and meson productio n. Furthermore\, the formation of an intense coherent gluon field in Pb+Pb collisions results in additional heavy quark-antiquark pairs. Thus the pr imary charm quark momentum distribution will be modified\, as well as the final state hadron distributions and the baryon-to-meson ratios in differe nt momentum windows. We performed calculations with time dependent strong color fields and studied the charm quark-antiquark pair production and ch armed hadron production in the intermediate- and high-pT windows at LHC en ergies. The obtained numerical results are presented and discussed.\n\nP. Levai\, V.V. Skokov:\nNonperturbative enhancement of heavy quark-pair prod uction in strong SU(2) color field\nPhys. Rev. D82 (2010) 074014.\n\nP. Le vai\, D. Berenyi\, A. Pasztor\, V.V. Skokov:\nAnomalous baryon production and its interplay with jet energy loss at RHIC and LHC energies\nJ. Phys. G38 (2011) 124155.\n\nhttp://indico.cern.ch/contributionDisplay.py?contrib Id=515&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=515&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Perturbative calculation in 1+1dimensional relativistic viscous hy drodynamics DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-517@cern.ch DESCRIPTION:Speakers: FUKUDA\, Kyohei (Nagoya)\nWe discuss the evolution o f the fluctuation in the initial conditions \n of entropy densities (energ y densities) using 1+1 dimensional hydrodynamic calculations. \nWe explore not only the evolution of the fluctuation but also the origin of it. \nIf the local thermal equilibrium is established at early time of the heavy i on collision \nand the mean free path of produced particles is sufficientl y short\,\n then the later evolution of the system may be described by rel ativistic hydrodynamics. \nMost of studies have been performed with ideal hydrodynamics\, but it is necessary to \ntake into account of viscosity ef fect in hydrodynamical expansion \nto understand experimental data in det ail.\n In particular\, we focus on the dynamics along the collision axis a nd investigate how \nthe viscous effects appear in evolution of the fluctu ation \nin the framework of perturbation with respect to the bulk and shea r viscosities. \nAssuming that the bulk and shear viscosities are small we calculate the entropy \nproduction during hydrodynamic evolution and the initial condition \ndependence of it. \nHere we use the Bjorken's solution for the ideal part (0th-order) in our \nperturbative approach and show de tail calculated results.\n\nhttp://indico.cern.ch/contributionDisplay.py?c ontribId=517&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=517&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Is the event plane dependent modification to jet-like correlations due to analysis biases or jet-medium interactions? DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-516@cern.ch DESCRIPTION:Speakers: KONZER\, Joshua ()\nThe STAR results [1] from dihadr on correlations as a function of the high-pt trigger azimuth relative to t he event plane (phi_s) show a significant change from in-plane (phi_s~0) t o out-of-plane direction (phi_s~90 degree). The near-side correlation is c omposed of two components: the jet-like correlation and the ridge\; The fo rmer is found to be invariant over phi_s while the ridge is primarily obse rved in-plane. On the other hand\, the away-side "double hump" is present only out-of-plane. It has been found that the recently characterized trian gular flow does not change the qualitative conclusions [1]. However\, the question remains\, whether the observed phi_s dependent modification is du e to analysis biases in flow background subtraction or jet-medium interact ions.\n\nIn this talk we analyze high-pt triggered dihadron correlations r elative to the event plane in the AMPT (A Multi-Phase Transport) parton ca scade model. The AMPT model\, with its string melting\, has been previousl y shown to reproduce some of the global phenomena seen in heavy-ion collis ions\, specifically flow [2]. We first obtain the near-side jet-like corre lations from the difference of large and small delta-eta azimuthal correla tions and find AMPT does not reproduce the STAR data. We then analyze the large delta-eta azimuthal correlation by subtraction of v2\, v3\, and v4 h armonic flows. The vn harmonic flows are obtained from two- and four-parti cle cumulant method and compared to the true average calculated using th e initial geometry harmonic planes in AMPT. We assess the non-flow contrib utions in vn by the newly developed decomposition method [3]\, and address possible biases in our AMPT correlation analysis. We discuss their implic ations to the STAR data by comparing the vn subtracted event plane depende nt dihadron correlations in AMPT to the STAR results. We discuss the remai ning effects of jet-medium interactions in AMPT.\n\n[1] H. Agakishiev et a l. (STAR Colloaboration)\, arXiv:1010.0690 [nucl-ex].\n[2] Z.-W. Lin and C .M. Ko\, Phys. Rev. C 65\, 034904 (2002).\n[3] L. Xu\, L. Yi\, D. Kikola\, J. Konzer\, F. Wang\, and W. Xie\, arXiv:1204.2815 [nucl-ex].\n\nhttp://i ndico.cern.ch/contributionDisplay.py?contribId=516&sessionId=37&confId=181 055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=516&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:D meson nuclear modification factors in Pb–Pb collisions at 2.76 TeV with the ALICE detector DTSTART;VALUE=DATE-TIME:20120817T180000Z DTEND;VALUE=DATE-TIME:20120817T182000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-458@cern.ch DESCRIPTION:Speakers: GRELLI\, Alessandro (University of Utrecht (NL))\nTh e properties of the hot and dense QCD medium formed in ultra-relativistic heavy ion collisions\, as well as the mechanism of in-medium partonic ener gy loss\, can be accessed via the measurement of the nuclear modification factor of particle production. The measurement of D meson production provi des key tests of parton energy-loss models\, which predict that charm qua rks should experience less in-medium energy loss than light quarks and glu ons.\n\nThe ALICE experiment has measured the production of prompt D0\, D+ and D*+ mesons in pp and Pb-Pb collisions at the LHC at sqrt(s) = 7 and 2 .76 TeV and at sqrt(s_{NN}) = 2.76 TeV\, respectively\, via the exclusive reconstruction of their hadronic decay. The p_t -differential production y ields in the range 2 \n\nhttp://indico.cern.ch/contributionDisplay.py?cont ribId=458&sessionId=23&confId=181055 LOCATION: Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=458&sessionId=2 3&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:STAR Highlights DTSTART;VALUE=DATE-TIME:20120813T151000Z DTEND;VALUE=DATE-TIME:20120813T153500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-622@cern.ch DESCRIPTION:Speakers: DONG\, Xin (LBNL)\nhttp://indico.cern.ch/contributio nDisplay.py?contribId=622&sessionId=42&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=622&sessionId=4 2&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:PHENIX Highlights DTSTART;VALUE=DATE-TIME:20120813T144500Z DTEND;VALUE=DATE-TIME:20120813T151000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-621@cern.ch DESCRIPTION:Speakers: SAKAGUCHI\, Takao (BNL)\nhttp://indico.cern.ch/contr ibutionDisplay.py?contribId=621&sessionId=42&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=621&sessionId=4 2&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Broad Overview DTSTART;VALUE=DATE-TIME:20120813T133000Z DTEND;VALUE=DATE-TIME:20120813T141500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-620@cern.ch DESCRIPTION:Speakers: WIEDEMANN\, Urs (CERN)\nhttp://indico.cern.ch/contri butionDisplay.py?contribId=620&sessionId=46&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=620&sessionId=4 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Initial-state fluctuations to Final State Physics DTSTART;VALUE=DATE-TIME:20120813T184000Z DTEND;VALUE=DATE-TIME:20120813T190500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-627@cern.ch DESCRIPTION:Speakers: DUSLING\, Kevin ()\nhttp://indico.cern.ch/contributi onDisplay.py?contribId=627&sessionId=1&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=627&sessionId=1 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Review of CGC & Developments DTSTART;VALUE=DATE-TIME:20120813T181500Z DTEND;VALUE=DATE-TIME:20120813T184000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-626@cern.ch DESCRIPTION:Speakers: DUMITRU\, Adrian (Baruch College (City University of New York))\nhttp://indico.cern.ch/contributionDisplay.py?contribId=626&se ssionId=1&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=626&sessionId=1 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Experimental highlights from the CMS Collaboration DTSTART;VALUE=DATE-TIME:20120813T162500Z DTEND;VALUE=DATE-TIME:20120813T165000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-625@cern.ch DESCRIPTION:Speakers: ROLAND\, Gunther (Massachusetts Inst. of Technology (US))\nhttp://indico.cern.ch/contributionDisplay.py?contribId=625&sessionI d=42&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=625&sessionId=4 2&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:ATLAS Highlights DTSTART;VALUE=DATE-TIME:20120813T160000Z DTEND;VALUE=DATE-TIME:20120813T162500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-624@cern.ch DESCRIPTION:Speakers: WOSIEK\, Barbara Krystyna (Polish Academy of Science s (PL))\nhttp://indico.cern.ch/contributionDisplay.py?contribId=624&sessio nId=42&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=624&sessionId=4 2&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of omega->3pi in pp collision at 7TeV with ALICE DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-450@cern.ch DESCRIPTION:Speakers: YANO\, Satoshi (Hiroshima University (JP))\nThe $\\o mega$ meson is a promising probe to investigate the properties of the QGP. It is well known that the yield of high-p_t particles is suppressed in nu cleus-nucleus collisions relative to that in pp collisions.\nThe effect is attributed to the energy loss of the energetic parent partons traversing the created medium.\nSince $\\pi^0$ and $\\omega$ mesons have the same qua rk content (u and d)\, the comparison of the suppression between $\\pi^$ a nd $\\omega$ can provide \ninformation whether the energy loss occurs at t he parton level or not.\n\nThe ALICE detector covers a wide central region (|\\eta|\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=450&se ssionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=450&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Analysis of the pi0-charged hadron correlations using ALICE EMCal DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-451@cern.ch DESCRIPTION:Speakers: ZHU\, Xiangrong (Central China Normal University CC NU (CN))\nNeutral pion production measured with the ALICE detector in Pb-P b collisions at the LHC is an important tool to study the properties of th e hot and dense medium created in heavy-ion collisions. \n\nThe neutral pi on yield\, obtained with the ALICE electromagnetic calorimeter in pp colli sions at sqrt(s) = 2.76 and 7 TeV\, as well as in Pb-Pb collisions at sqrt (s_NN) = 2.76\, is analyzed in terms of x_t scaling. High-p_t neutral pio ns are used as trigger particles to study the momentum distribution of the associated charged particles. \n\nThe latest status of the analysis in pp and Pb-Pb collisions will be presented.\n\nhttp://indico.cern.ch/contribu tionDisplay.py?contribId=451&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=451&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Hydro Overview DTSTART;VALUE=DATE-TIME:20120813T193000Z DTEND;VALUE=DATE-TIME:20120813T195500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-629@cern.ch DESCRIPTION:Speakers: Dr. OLLITRAULT\, Jean-Yves (CNRS)\nhttp://indico.cer n.ch/contributionDisplay.py?contribId=629&sessionId=1&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=629&sessionId=1 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:PHENIX Results on Cold Nuclear Matter DTSTART;VALUE=DATE-TIME:20120813T190500Z DTEND;VALUE=DATE-TIME:20120813T193000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-628@cern.ch DESCRIPTION:Speakers: WYSOCKI\, Matthew (University of Colorado at Boulder )\nhttp://indico.cern.ch/contributionDisplay.py?contribId=628&sessionId=1& confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=628&sessionId=1 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Isolated photons in pp and Pb-Pb collisions at the LHC with the AL ICE EMCal DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-456@cern.ch DESCRIPTION:Speakers: COSENTINO\, Mauro Rogerio (Lawrence Berkeley Nationa l Lab. (US))\nPhotons are of great interest in relativistic heavy-ion coll isions due to the fact that they\ndo not interact strongly\, and thus are used to make a tomographic view of those collisions. \n\nOf special intere st are the directly produced high-transverse momentum photons. \nThe ratio of their yield in Pb-Pb to pp collisions is sensitive to initial state ef fects. \nFurthermore\, direct photons can be used tag the away-side parton in photon-jet or photon-hadron \ncorrelations studies. The application of isolation criteria to the selected photon candidates \nis an important ex perimental tool to suppress the contamination from decay photon\, but also \nfrom fragmentation and Bremstrahlung photons.\n\nIn this poster\, we pr esent isolated photon spectra in transverse momentum ranges between 15 and \n50 GeV/c in pp and Pb-Pb collisions at center-of-mass energies of 2.76 and 7 TeV. The isolated \nphotons are reconstructed in datasets triggered by the ALICE Electromagnetic Calorimeter.\n\nhttp://indico.cern.ch/contrib utionDisplay.py?contribId=456&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=456&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Anisotropic flow of identified particles in Pb-Pb collisions at 2. 76 TeV measured with ALICE at the LHC DTSTART;VALUE=DATE-TIME:20120817T180000Z DTEND;VALUE=DATE-TIME:20120817T182000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-457@cern.ch DESCRIPTION:Speakers: NOFERINI\, Francesco (Universita e INFN (IT))\nThe a nisotropic flow of identified particles is an important observable to prob e the freeze-out properties\, the parton energy loss and the partonic phas e of the system created in heavy-ion collisions. We report on the elliptic and triangular flow measurements for a number of identified particles suc h as charged pions\, kaons and (anti-)protons\, as well as K0s \, Λ/anti- Λ\, Ξ\, and Ω. The results are reported at mid-rapidity\, |η| \n\nhttp ://indico.cern.ch/contributionDisplay.py?contribId=457&sessionId=26&confId =181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=457&sessionId=2 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Charge dependent correlations relative to the fourth harmonic even t plane and an estimate of the background effects in CME measurements DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-178@cern.ch DESCRIPTION:Speakers: MLYNARZ\, Jocelyn (Wayne State University (US))\nCha rge dependent azimuthal correlations relative to the reaction plane measu red by the STAR collaboration at RHIC and ALICE at the LHC are consistent with expectations from the strong local parity violation in QGP manifestin g itself via the Chiral Magnetic Effect. The background to these measureme nts comes from interplay of strong anisotropic flow and correlations not r elated to CME. In this study\, we present results on charge dependent corr elations relative to the fourth harmonic event plane measured with the ALI CE detector at the LHC in Pb-Pb collisions at \\sqrt{s_{NN}} = 2.76 TeV. T hese correlations\, measured relative to the fourth harmonic event plane\, are insensitive to the presence of CME\, unlike the ones measured relati ve to the second harmonic event plane\, but include possible backgrounds d ue to anisotropic flow thus providing an estimate of the background effect s affecting the previous measurements.\n\nhttp://indico.cern.ch/contributi onDisplay.py?contribId=178&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=178&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Strong Color Fields in Nuclei from Fits to Nuclear Parton Distribu tions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-600@cern.ch DESCRIPTION:Speakers: OZONDER\, Sener (University of Minnesota)\nWe consid er a modified version of the McLerran-Venugopalan model where the thicknes s of the nucleus is finite and infrared divergences are removed by the col or neutrality condition. The strong coupling constant and the nucleon size are treated as parameters. To determine these parameters\, the x-dependen t gluon distribution function is calculated at very low momentum\, which i s the region of validity of this model. The resulting distribution functio n is evolved with the DGLAP equation to higher momenta by using the QCDNUM package and compared with data as parametrized by nuclear CTEQ. This allo ws us to infer the parameters\, and hence to calculate the classical color fields representing the initial conditions in high energy heavy-ion colli sions without any free parameters.\n\nhttp://indico.cern.ch/contributionDi splay.py?contribId=600&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=600&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Event shape engineering with ALICE DTSTART;VALUE=DATE-TIME:20120814T193500Z DTEND;VALUE=DATE-TIME:20120814T195500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-176@cern.ch DESCRIPTION:Speakers: DOBRIN\, Alexandru Florin (Wayne State University (U S))\nStrong fluctuations of the anisotropic flow and the large acceptance of the ALICE detector allow an efficient selection of the events correspon ding to a specific initial geometry. This opens many new possibilities to study the properties of the system created in ultra-relativistic nuclear c ollisions. In this talk\, using the Pb-Pb collisions at $\\sqrt{s_{NN}} = 2.76$~TeV data\, we demonstrate the ability of the method to select events with anisotropic flow values significantly larger or smaller than the ave rage. For those events we present results on centrality and momentum depen dence of the anisotropic flow obtained with different methods including tw o- and many-particle correlations. We also investigate obtaining the full $v_2$ distribution via unfolding methods.\n\nhttp://indico.cern.ch/contrib utionDisplay.py?contribId=176&sessionId=4&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=176&sessionId=4 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Three-Particle Azimuthal Correlations with an Intermediate-$p_T$ T rigger in Pb-Pb at $\\sqrt{s_{NN}}=2.76$ TeV in ALICE DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-175@cern.ch DESCRIPTION:Speakers: ULERY\, Jason Glyndwr (Johann-Wolfgang-Goethe Univ. (DE))\nTri-hadron azimuthal correlations are studied in Pb-Pb collisions a t $\\sqrt{s_{NN}}=2.76$ TeV in ALICE. They are analyzed with one intermedi ate $p_T$ trigger to preferentially select on jets and two lower $p_T$ ass ociated particles. With these correlations interaction of the jets and the medium can be studied. Three-particle correlations can give insight into the sources of modification to the jet shape such as jet deflection by rad ial flow\, $k_T$ broadening\, path length dependent energy loss\, or conic al emission from either \\v{C}erenkov gluon radiation or a Mach Cone. In a ddition\, different background subtraction systematics allow us to study t hree-particle correlations in the $p_T$ region where the flow systematics are very large in two-particle correlations. The dependence of the results on collision centrality and on trigger and associated particle $p_T$ will be presented.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=1 75&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=175&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Elliptic flow of strange and multi-strange hadrons in Pb-Pb collis ions at $\\sqrt{s_{NN}}$ = 2.76 TeV measured with ALICE DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-174@cern.ch DESCRIPTION:Speakers: PEREZ LARA\, Carlos (Nikhef\, Utrecht University)\nA nisotropic flow of identified particles provides important information abo ut the properties of the matter created in a heavy-ion collisions.We repor t the elliptic flow of strange (K$^0_s$ $\\Lambda$) and multi-strange ($\\ Xi$ $\\Omega$) hadrons measured at mid rapidity (|eta|\n\nhttp://indico.ce rn.ch/contributionDisplay.py?contribId=174&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=174&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Suppression of D-mesons production at relativistic heavy ion colli sions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-173@cern.ch DESCRIPTION:Speakers: Dr. BEGUM\, Umme Jamil (Debraj Roy College\, Golagha t\, Assam\, India)\nCharm quarks/antiquarks produced in the initial stage of heavy ion collisions\, would traverse the quark gluon plasma\, collidin g with quarks and gluons and radiating gluons before appearing as D-mesons . Thus the final spectra of D-mesons would contain information of the medi um modification suffered by the charm quarks/antiquarks. We have made a de tailed study for the nuclear modification factor of production of D-mesons from the initial fusion of partons in a nuclear collision at RHIC and LHC energies. \nAs a first step\, we made a comparative study of some of the energy loss formalisms of charm quarks/antiquarks available in the literat ure with the same initial conditions [1]. \nWe consider both the radiative and collision energy loss along with longitudinal expansion of the plasma for the prediction of nuclear modification factor. As at RHIC and LHC ene rgies\, parton densities reach very high values leading to effective nucle ar shadowing\, we use the modified structure functions due to shadowing ef fect given by EKS98 group\, in 1998 [2]. Peterson fragmentation function [ 3] is used for fragmentation of Charm quarks/antiquarks into D-mesons.\n W e have seen that our result can satisfactorily explain the ALICE experimen tal data for nuclear modification of D-mesons at Pb+Pb collision @ 2.76 AT eV. The result with a recent radiative energy loss calculation [4] has an increasing trend at high transverse momentum and explains the nuclear modi fication for transverse momentum up to 15 GeV very well. The inclusion of collisional energy loss of charm quarks/antiquarks further suppresses the muclear modification factor of D-mesons.\n\n1. Umme Jamil and Dinesh K Sri vastava\,\n J. Phys. G: Nucl. Part. Phys. 37 (2010) 085106\n2. K. J. Eskola\, V. J. Kolhinen and C. A. Salgado \n Eur. Phys. J . C 9 (1999) 61 \n3. C. Peterson\, D. Schlatter\, I. Schmitt and P. Zerwas \,\n Phys. Rev. D27 (1983) 105 \n4. R. Abir\, U. Jamil\, M. G. Mustafa and D. K. Srivastava\,\n arXiv:1203.5221 [hep-ph].\n\nh ttp://indico.cern.ch/contributionDisplay.py?contribId=173&sessionId=37&con fId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=173&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Shining a Gluon Beam through Quark-Gluon Plasma DTSTART;VALUE=DATE-TIME:20120816T190000Z DTEND;VALUE=DATE-TIME:20120816T192000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-172@cern.ch DESCRIPTION:Speakers: RAJAGOPAL\, Krishna (MIT)\nA holographic calculation of the quenching of a beam of gluons with typical momenta q shining throu gh strongly coupled quark-gluon plasma shows that such a beam is attenuate d rapidly over a distance of order q^{1/3} (pi T)^{-4/3} as it propagates at the speed of light\, shedding trailing sound waves with momenta of orde r (pi T). At larger and larger q\, the trailing sound wave becomes less a nd less prominent. The outward-going beam of gluon radiation itself shows no tendency to spread in angle or to shift toward larger wavelengths\, ev en as it is completely attenuated. In this regard\, the behavior of the b eam of gluons that we analyze is reminiscent of the behavior of jets produ ced in heavy ion collisions at the LHC that lose a significant fraction of their energy without appreciable change in their angular distribution or their momentum distribution as they plow through the strongly coupled quar k-gluon plasma produced in these collisions. However\, we know that quark -gluon plasma must be weakly coupled at short enough distance scales. Thi s means that even if jet quenching typically occurs as in a strongly coupl ed plasma\, there should be rare events in which a hard parton is scattere d by a larger angle\, picking up significant transverse momentum.\n\nhttp: //indico.cern.ch/contributionDisplay.py?contribId=172&sessionId=18&confId= 181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=172&sessionId=1 8&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Quarkonium measurements with the proposed sPHENIX detector DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-171@cern.ch DESCRIPTION:Speakers: ROSATI\, Marzia (Iowa State University)\nThe PHENIX collaboration is in the process of developing an ambitious upgrade plan (c alled sPHENIX) to significantly improve physics capabilities and make use of the full enhanced luminosity at RHIC. The sPHENIX design contains silic on tracking\, electromagnetic and hadronic calorimetry with large kinemat ic coverage and high data rate capabilities to sample 50 billion Au+Au col lisions annually.\n\nThis poster will describe how additional tracking lay ers and a preshower detector\, will enable us to measure and resolve the t hree bottomonium Y(1S)\, Y(2S) and Y(3S) states decaying into di-electrons . Expected mass resolution\, signal to background ratios for various assum ptions of pion rejection factors will be presented.\n\nhttp://indico.cern. ch/contributionDisplay.py?contribId=171&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=171&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:How does longitudinal drag change the radiative energy loss rate? DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-170@cern.ch DESCRIPTION:Speakers: QIN\, Guang-You (Duke University/Wayne State Univers ity)\nJets propagating through dense matter are modified due to the scatte ring between the patrons of the jet with the constituents of the medium. S uch scattering leads to an exchange of momenta between the medium and the jet\, and has components that are both parallel and perpendicular to the d irection of jet propagation. These scatterings introduce both drag and dif fusion\, and also change the rate of parton splitting leading to radiative energy loss. In all current calculations of jet modification\, only the e ffect of transverse scattering (quantified by $\\hat{q}$) on stimulated em ission has been considered. The effect of longitudinal exchange\, leading to a drag and diffusion of the produced patrons\, is included separately. We compute\, for the first time\, the gluon emission rate from a hard quar k in the presence of both transverse and longitudinal exchange. Depending on the size of the longitudinal drag and diffusion coefficients\, longitud inal scattering is shown to influence the radiative energy loss of a hard quark in a dense medium in a non-intuitive way. Ramifications of this effe ct for the phenomenology of jet quenching in heavy-ion collisions will als o be presented.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId= 170&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=170&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Anisotropic flow measured from multi-particle azimuthal correlatio ns for Pb-Pb collisions at 2.76 TeV by ALICE at the LHC DTSTART;VALUE=DATE-TIME:20120817T211000Z DTEND;VALUE=DATE-TIME:20120817T213000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-183@cern.ch DESCRIPTION:Speakers: BILANDZIC\, Ante (Niels Bohr Institute (DK))\nThe pr operties of the produced matter in a heavy-ion collision can be experiment ally studied by measuring the azimuthal anisotropy in the momentum distrib ution of the produced particles. Quantified by the anisotropic flow coeffi cients\, v_n\, and corresponding symmetry planes\, psi_n\, such anisotropy is expected to reflect the shape of the initial energy density of the col lision. We report on the measurement of various flow harmonics\, v_n\, wit h multi-particle cumulants\, and present the results from a study of the i nter-correlation among different order symmetry planes psi_n via multi-par ticle mixed harmonic correlations. This provides comprehensive experimenta l information on the fluctuating event-by-event shape of the initial condi tions\, which is currently among the main sources of large theoretical unc ertainties in describing the evolution of the system created in heavy-ion collisions.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=183& sessionId=59&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=183&sessionId=5 9&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Overview of results on photon and electroweak boson production fro m the CMS collaboration DTSTART;VALUE=DATE-TIME:20120816T134500Z DTEND;VALUE=DATE-TIME:20120816T141000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-656@cern.ch DESCRIPTION:Speakers: GRANIER DE CASSAGNAC\, Raphael (Ecole Polytechnique (FR))\nhttp://indico.cern.ch/contributionDisplay.py?contribId=656&sessionI d=14&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=656&sessionId=1 4&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Quantum Description of Impurities - Heavy Quarks and Quarkonia DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-599@cern.ch DESCRIPTION:Speakers: AKAMATSU\, Yukinao (Nagoya University)\nSingle heavy quark system has been considered as a hard probe for dynamical informatio n of quark-gluon plasma (QGP)\, namely drag force\, while heavy quarkonium has been thought to probe static information\, such as heavy quark potent ial. However\, this intuitive picture is not correct\, in particular for t he latter. Recent theoretical developments have shown that dynamical featu re is also important in the physics of heavy quarkonia through complex hea vy quark potential [1]. This complex potential can be understood as stocha stic process in the medium [2]. However\, as pointed out in [2]\, complete description must also explain the irreversible process\, which results in drag force in the classical limit. In other words\, a unified description of heavy quark systems is required.\nIn this presentation\, I will develo p such a quantum description for heavy quark systems in QGP on the basis o f closed-time formalism in non-equilibrium field theory. In this descripti on\, I will explain how we can obtain the stochastic process and the drag force from the first principle and derive the master equation for quantum evolution of the heavy quark systems.\n\n[1] M. Laine et al.\, JHEP 0703 ( 2007) 054\; JHEP 0705\, 028(2007).\nA. Beraudo\, J. P. Blaizot and C. Ratt i\, Nucl. Phys. A806\, 312 (2008).\nN. Brambilla\, J. Ghiglieri\, A. Vairo and P. Petreczky\, Phys. Rev. D 78\, 014017 (2008).\nA. Rothkopf\, T. Hat suda and S. Sasaki\, arXiv:1108.1579 [hep-lat].\n[2] Y. Akamatsu and A.Rot hkopf\, arXiv:1110.1203 [hep-ph] (to be published in PRD).\n\nhttp://indic o.cern.ch/contributionDisplay.py?contribId=599&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=599&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Quantifying a Possibly Reduced Jet-Medium Coupling of the sQGP at the Large Hadron Collider DTSTART;VALUE=DATE-TIME:20120814T214500Z DTEND;VALUE=DATE-TIME:20120814T220500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-2@cern.ch DESCRIPTION:Speakers: BETZ\, Barbara (Frankfurt University)\nRecent LHC da ta on the nuclear modification factor of jet fragments suggest that the je t-medium coupling at the Large Hadron Collider (LHC) may be reduced relati ve to the coupling at the Relativistic Hadron Collider (RHIC). We estimate the magnitude of that reduction \nfrom a combined fit to the data on the nuclear modification factor and on the elliptic flow at both RHIC and LHC energies over a broad centrality range and a momentum range of 5-100 GeV. We also compare Glauber and Color Glass Condensate initial conditions usin g a simple analytic energy-loss model that can interpolate between weakly- coupled tomographic and strongly-coupled holographic jet-energy loss model s. We find that an approximately 10% reduction of the jet-medium coupling from RHIC to LHC can account for the observed LHC data in reasonable accor d with the magnitude expected from a running coupling associated with doub ling the density of the strongy-coupled Quark-Gluon Plasma (sQGP) from RHI C to LHC.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=2&sess ionId=48&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=2&sessionId=48& confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Di-Lepton Physics Program at STAR DTSTART;VALUE=DATE-TIME:20120816T123000Z DTEND;VALUE=DATE-TIME:20120816T125500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-652@cern.ch DESCRIPTION:Speakers: GEURTS\, Frank (Rice University (US))\nhttp://indico .cern.ch/contributionDisplay.py?contribId=652&sessionId=14&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=652&sessionId=1 4&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:NICA @ JINR DTSTART;VALUE=DATE-TIME:20120817T203000Z DTEND;VALUE=DATE-TIME:20120817T205000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-187@cern.ch DESCRIPTION:Speakers: LEDNICKY\, Richard (Joint Institute for Nuclear Rese arch\, Dubna\, Russia)\nScientific program of NICA (Nuclotron-based Ion Co llider fAcility) is now under realization phase at JINR (Dubna). The main goal of the program is an experimental study of hot and dense strongly int eracting matter in heavy ion collisions at nucleon-nucleon centre-of-mass energies of 4-11 GeV and at average luminosity of 10E27 cm-2s-1 for Au (79 +) in the collider mode. In parallel\, fixed target experiments at the upg raded JINR superconducting synchrotron Nuclotron are carried out with the extracted beams of various nuclei species up to gold with the momenta up t o 13 GeV/c for protons. The program also foresees a study of spin physics with extracted and colliding beams of polarized deuterons and protons at t he centre-of-mass energies up to 26 GeV for proton collisions. The propose d program allows to search for possible signs of the mixed phase and criti cal endpoint\, and to shed more light on the problem of nucleon spin struc ture. General design and construction status of the complex is presented.\ n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=187&sessionId=58 &confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=187&sessionId=5 8&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Heavy quarkonium in hot medium DTSTART;VALUE=DATE-TIME:20120816T154500Z DTEND;VALUE=DATE-TIME:20120816T160500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-650@cern.ch DESCRIPTION:Speakers: HATSUDA\, Tetsuo ()\nhttp://indico.cern.ch/contribut ionDisplay.py?contribId=650&sessionId=41&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=650&sessionId=4 1&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Quarkonia Discussion DTSTART;VALUE=DATE-TIME:20120816T160500Z DTEND;VALUE=DATE-TIME:20120816T162000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-651@cern.ch DESCRIPTION:Speakers: \nhttp://indico.cern.ch/contributionDisplay.py?contr ibId=651&sessionId=41&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=651&sessionId=4 1&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Studies of net-charge fluctuations and balance functions with the ALICE detector at the LHC DTSTART;VALUE=DATE-TIME:20120814T210500Z DTEND;VALUE=DATE-TIME:20120814T212500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-186@cern.ch DESCRIPTION:Speakers: WEBER\, Michael (University of Houston (US))\nThe cr eation of a strongly interacting deconfined Quark Gluon Plasma (QGP) phase in relativistic heavy-ion collisions can be studied by the fluctuations o f conserved quantities like net-charge\, and correlations between positive and negative pairs by using the method of Balance functions. Net-charge f luctuations are sensitive to the number of charges present in the system\, thus the fluctuations in the QGP\, with fractionally charged partons\, ar e expected to be different from those of the hadron gas with unit charged particles. Lattice calculations suggest that the higher moments of net-cha rge distributions and their products are sensitive to the correlation leng th\, and are related to the thermodynamic susceptibilities of the system. The method of the Balance function\, on the other hand\, is sensitive to c ollective flow and the breakup temperature and was proposed to give a hand le on the hadronization time. A combined study of net-charge fluctuations with Balance functions provides insight to the properties of matter create d in high energy collisions. We will present the first results of net-char ge fluctuations\, higher moments of net-charge distributions and Balance f unctions for Pb-Pb collisions at √sNN = 2.76 TeV measured by the ALICE e xperiment at the LHC. The results from net-charge fluctuations\, presented in terms of νdyn and D-measure\, are compared to predictions for a syste m initially dominated by a QGP\, as well as for a hadron resonance gas. Th e widths of the Balance functions in pseudorapidity and azimuthal angle fo r non-identified charged particles show a clear centrality dependence\, co nsistent with the picture of a delayed hadronization but also with a syste m exhibiting larger radial expansion in central collisions. A comparison o f the results will be made to lower energy collisions at SPS and RHIC as w ell as to several models that incorporate collective effects.\n\nhttp://in dico.cern.ch/contributionDisplay.py?contribId=186&sessionId=49&confId=1810 55 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=186&sessionId=4 9&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Strange hadrons and resonances in Pb-Pb collisions at sqrt_NN = 2. 76 TeV with ALICE experiment at LHC DTSTART;VALUE=DATE-TIME:20120816T184000Z DTEND;VALUE=DATE-TIME:20120816T190000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-188@cern.ch DESCRIPTION:Speakers: SINGHA\, Subhash (Department of Atomic Energy (IN))\ nThe ALICE experiment at the LHC has measured the production of strange ha drons and resonances in Pb-Pb and pp collisions at unprecedentedly high be am energies. The study of strange hadrons and resonances helps us to under stand the medium properties and its evolution at di\n\nhttp://indico.cern. ch/contributionDisplay.py?contribId=188&sessionId=15&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=188&sessionId=1 5&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Search for Chiral Magnetic Effects in High-Energy Nuclear Collisio ns DTSTART;VALUE=DATE-TIME:20120816T162000Z DTEND;VALUE=DATE-TIME:20120816T164500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-658@cern.ch DESCRIPTION:Speakers: WANG\, Gang (UCLA)\nhttp://indico.cern.ch/contributi onDisplay.py?contribId=658&sessionId=41&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=658&sessionId=4 1&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:STAR Results from RHIC Beam Energy Scan DTSTART;VALUE=DATE-TIME:20120817T123000Z DTEND;VALUE=DATE-TIME:20120817T125000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-659@cern.ch DESCRIPTION:Speakers: KUMAR\, lokesh (Kent State University)\nhttp://indic o.cern.ch/contributionDisplay.py?contribId=659&sessionId=33&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=659&sessionId=3 3&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Event by event di-hadron correlations in Pb-Pb 2.76 TeV collisions from the ALICE experiment DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-184@cern.ch DESCRIPTION:Speakers: TIMMINS\, Anthony Robert (University of Houston (US) )\nThe large multiplicities at the LHC permit flow harmonics to be determi ned on an event by event basis in Pb+Pb collisions. We extract these harmo nics from inclusive event by event di-hadron correlations\, where the mini mum track pT is larger than 0.15 GeV. Within a fine centrality bin\, we fi nd the correlation function varies substantially on an event by event basi s\, indicating large fluctuations in the initial conditions for a given im pact parameter. Such large fluctuations lead to some events being highly t riangular or highly elliptical\, where the angular correlation function is completely dominated by the respective cos(2#delta#phi) and cos(3#delta#p hi) terms. We will show the 2D inclusive correlation function for such eve nts\, and access the covariance between different harmonics. Finally\, we will present first measurements of the full v2 distribution for various ce ntralities\, and report the higher moments. Implications for our understan ding of the initial conditions will be discussed.\n\nhttp://indico.cern.ch /contributionDisplay.py?contribId=184&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=184&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:A chiral effective theory for dilepton production in NN and AA col lisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-11@cern.ch DESCRIPTION:Speakers: RISCHKE\, Dirk (U)\nIn this talk\, I present an effe ctive model based on the linear\nrepresentation of the chiral U(N_f)_r x U (N_f)_l symmetry of QCD. It is demonstrated that a reasonable fit of the m ass parameters and coupling constants of the model to hadron vacuum proper ties can be obtained. This study can contribute to answering the question about the quark content of the scalar isoscalar mesons. The model is used to investigate dilepton production in NN and AA collisions and to search f or signatures of chiral symmetry restoration at nonzero temperatures and d ensities.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=11&ses sionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=11&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Theory and phenomenology of quarkyonic percolation of finite densi ty QCD matter DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-10@cern.ch DESCRIPTION:Speakers: TORRIERI\, Giorgio (JW Goethe Universitat\, Frankfur t)\nWe generalize the percolating transition discovered in [1] to the full phase diagram\, exploring the onset of "quarkyonic percolation" for SU(N) Yang-Mills matter when baryon density\, temperature and number of colors are varied.\nWe show that percolation's dependence on number of colors is different from deconfinement\, suggesting that the two phases are general ly distinct\, with the percolating phase being similar to the quarkyonic p hase conjectured in [2]. \nWe find that\, in our world (3 colors\, 2-3 fl avors) a percolating but confined phase can arise at 2-3 times nuclear den sity and moderate temperature. The new phase is confined and contains b aryons\, yet quark-hole states can propagate to arbitrary distances due to the onset of percolation of tunneling transitions across baryons.\nWe con clude by sketching an effective theory of percolating matter\, and suggest ing experimental signatures of it in lower energy heavy ion collisions (FA IR\,NICA and the RHIC low energy scan) as well as within neutron stars and supernovae.\n\nBased on [1] and [3]\n\n[1] S.Lottini and G.Torrieri\, Ph ys.Rev.Lett. 107 (2011) 152301\n[2] L.Mclerran\, R.Pisarski\, Nucl.Phys.A7 96:83-100\,2007\n[3] S. Lottini and G.Torrieri\, http://arxiv.org/abs/1204 .3272\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=10&session Id=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=10&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The Micro-Vertex-Detector of the CBM-Experiment DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-13@cern.ch DESCRIPTION:Speakers: TISCHLER\, Tobias (Goethe-Universität\, Frankfurt)\ nThe Compressed Baryonic Matter Experiment (CBM) is one of the core experi ments of the future FAIR facility at Darmstadt/Germany. The experiment wil l explore the phase diagram of hadronic matter in the regime of highest ba ryon densities. Nuclear fireballs created in heavy ion collisions of 8-45 AGeV beam energy will be studied with numerous probes\, among them open ch arm.\nReconstructing those rare probes requires a vacuum compatible micro vertex detector (MVD) with unprecedented properties. Its sensor technology has to feature a spatial resolution of 10e13 n/cm² and a time resolution of few 10 μs. The detector station must combine an active cooling of the sensors\n(~1W/cm²) with a material budget below few 0.1% radiation lengt h.\nTo match those requirements\, we rely on the CMOS Monolithic Active Pi xel Sensors provided by the IPHC Strasbourg. The highly granular and 50 μ m thin sensors will be mounted on a cooling support made from CVD diamond. This support drives the dissipated power to a heat sink outside the detec tor acceptance. The readout of the\nsensors will be done by means of ultra -thin flex print cables.\nWe discuss the concept of the CBM MVD and report about the status of our prototyping.\n\nhttp://indico.cern.ch/contributio nDisplay.py?contribId=13&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=13&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Clustering of Color Sources and the Temperature Dependence of She ar Viscosity of the QGP in Central A-A Collisions at RHIC and LHC Energies DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-14@cern.ch DESCRIPTION:Speakers: Dr. SRIVASTAVA\, brijesh (Purdue University)\nThe sh ear to viscosity ratios ($\\eta/s$) are obtained for the QGP in the contex t of the Color String Percolation Model (CSPM) using data produced in Au-A u collisions at $\\sqrt{s_{NN}}$ = 200 A GeV at RHIC and Pb-Pb at $\\sqrt{ s_{NN}}$ = 2.76 TeV at LHC \\cite{per}. The experimental transverse moment um spectrum is used to measure the percolation density parameter $\\xi$ in Au-Au collisions (STAR)\\cite{eos}. The relativistic kinetic theory relat ion for $\\eta/s$ is evaluated using CSPM values for the temperature and t he mean free path of the QGP constituents \\cite{gul1}. \nFor Pb-Pb at $\\ sqrt{s_{NN}}$ = 2.76 TeV\, $\\xi$ values are obtained from the extrapolati on at RHIC energy. The value of $\\eta/s$ is 0.204$\\pm$ 0.020 and 0.262$ \\pm$0.026 at the initial temperatures of 193.6 MeV (RHIC) and 262.2 MeV ( LHC)\, respectively. These values are 2.3 and 3.2 times the AdS/CFT conjec tured lower bound $1/4\\pi$ but are consistent with the theoretical estima tes of strongly coupled QGP.\n\nhttp://indico.cern.ch/contributionDisplay. py?contribId=14&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=14&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Inhomogeneous chiral phase in the QCD phase diagram and cooling of hybrid stars DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-16@cern.ch DESCRIPTION:Speakers: Prof. TATSUMI\, Toshitaka (Department of Physics\, K yoto University)\nRecently there has been much discussed the appearance of inhomogeneous chiral phases in the vicinity of the chiral restoration [1\ ,2]. The critical end point should be the Lifshitz point\, which propertie s have not been explored so much.Here we discuss an implication of inhomog eneous phase on cooling of hybrid stars.\nWe consider the dual-chiral-dens ity-wave (DCDW) specified by the spatially modulated quark condensates wit h amplitude \\Delta and wave number q [1]\, and study the beta decay of qu arks. Since the DCDW state can be represented as a chirally rotated state\ , the quark weak-current is accordingly transformed to have an additional phase factor which modifies the energy-momentum conservation at the vertex . The direct evaluation of the neutrino luminosity shows that it is propor tional to \\Delta^2q^2T^6\, which exhibits a similar form to the pion cool ing [3]. Since the DCDW phase develops only in the limited density region\ , this novel mechanism may give an interesting scenario that lower mass st ars should be cooler than heavy-mass ones\, which has been also proposed t o explain the recent data of Cas A in the context of color superconductivi ty [4]. \n[1]E. Nakano and T. Tatsumi\, Phys. Rev. D71 (2006) 114006.\n[2 ]D.Nickel\, Phys. Rev. Lett. 103 (2009) 072301\; Phys. Rev. D80 (2009) 074 025.\n[3]O.Maxwell et al.\, Ap. J. 216 (1977) 77.\n[4]T. Noda\, M. Hashimo to\, Y. Matsuo\, N. Yasutake\, T. Maruyama\, T. Tatsumi\, arXiv:1109.1080. \n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=16&sessionId=37 &confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=16&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Morphology of High-Multiplicity Events in Heavy Ion Collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-18@cern.ch DESCRIPTION:Speakers: Prof. GAARDHOJE\, Jens Jorgen (Niels Bohr Institute) \nWe discuss opportunities that may arise from subjecting high-multiplicit y events in relativistic heavy ion collisions to an analysis similar to th e one used in cosmology for the study of fluctuations of the Cosmic Microw ave Background (CMB). To this end\, we discuss examples of how pertinent f eatures of heavy ion collisions including global characteristics\, signatu res of collective flow and event-wise fluctuations are visually represente d in a Mollweide projection commonly used in CMB analysis\, and how they a re statistically analyzed in an expansion over spherical harmonic function s. If applied to the characterization of purely azimuthal dependent phenom ena such as collective flow\, the expansion coefficients of spherical harm onics are seen to contain redundancies compared to the set of harmonic flo w coefficients commonly used in heavy ion collisions. Our exploratory stud y indicates\, however\, that these redundancies may offer novel opportunit ies for a detailed characterization of those event-wise fluctuations that remain after subtraction of the dominant collective flow signatures. By co nstruction\, the proposed approach allows also for the characterization of more complex collective phenomena like higher-order flow and other source s of fluctuations\, and it may be extended to the characterization of phen omena of non-collective origin such as jets.\n\nJ.J. Gaardhoje\, P. Nasels ky et al.\n\nSee: arXiv:1204.0387v1 [hep-ph]\n\nhttp://indico.cern.ch/cont ributionDisplay.py?contribId=18&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=18&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Centrality\, mass and transverse momentum dependence of di-electro n elliptic flow in $\\sqrt{s_{NN}}$ = 200 GeV Au+Au collisions at STAR DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-322@cern.ch DESCRIPTION:Speakers: CUI\, Xiangli (U)\nDi-leptons are ideal probes of th e strongly interacting hot and dense\nmedium created at RHIC. They are not affected by the strong interaction once produced\, therefore they can pro be the whole evolution of the collision. The di-leptons spectra in the int ermediate mass range ($1.1\n\nhttp://indico.cern.ch/contributionDisplay.py ?contribId=322&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=322&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:sPHENIX Jet Reconstruction Performance DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-323@cern.ch DESCRIPTION:Speakers: SICKLES\, Anne (Brookhaven)\nReconstructed jets in h eavy ion collisions are a crucial tool for \nunderstanding the quark-gluon plasma. The separation of jets from \nthe underlying event is necessary\, particularly in central heavy \nion collisions\, in order to quantify med ium modifications of the parton \nshower. Here\, we describe a method for quantifying the underlying event contributions in Au+Au collisions at $\\s qrt{s_{NN}}$ = 200 GeV utilizing the HIJING event generator (from arXiv:12 03.1353) and show the expected jet reconstruction performance in heavy ion collisions using the proposed sPHENIX upgrade dector.\n\nhttp://indico.ce rn.ch/contributionDisplay.py?contribId=323&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=323&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:SHARE with CHARM describes PbPb hadron yields at 2.76 TeV DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-320@cern.ch DESCRIPTION:Speakers: PETRAN\, Michal (Czech Technical University (CZ))\nS oft hadron production at LHC energies presented a new challenge for the st atistical hadronization mode (SHM). We show that the SHARE chemical nonequ ilibrium model describes well the available hadron yield data. We than ext end SHARE to include CHARM contribution to hadron yields and present a rem arkably accurate description of hadron yields at energy s_{NN} =2.76 TeV f or several high multiplicity centrality bins.We show that ignoring the c harm contribution can introduce up to 40% contribution in yields of certai n hadrons which\, when measured\, offer an indirect evaluation of charm pr oduction yield. We demonstrate that employing SHARE with CHARM our current fit of pions\, kaons\, protons\, Xi's and Omegas is fully consistent wit h our understanding of AuAu and CuCu data at 62.4 and 200 GeV. This demons trates the overall superiority of the chemical nonequilibrium SHM model in predicting hadron production in relativistic heavy ion collisions.\n\nhtt p://indico.cern.ch/contributionDisplay.py?contribId=320&sessionId=37&confI d=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=320&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Transient Fluid Dynamics of a Strongly Coupled N = 4 SYM Plasma DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-321@cern.ch DESCRIPTION:Speakers: NORONHA\, Jorge (U)\nWe argue\, using the AdS/CFT co rrespondence\, that the transient\ndynamics of the shear stress tensor in a strongly coupled N = 4 SYM\nplasma is not described by relaxation-type\, fluid dynamical equations:\nat long times the equations of motion should contain a second-order\ncomoving derivative of the shear stress tensor. Th is occurs because in\nthis strongly-coupled system the lowest “non-hydro dynamical”\nquasinormal modes associated with shear stress possess a non zero real\npart at zero wavenumber. We use Weyl invariance to obtain the m ost\ngeneral equations of motion containing 2 comoving derivatives of the\ nshear stress tensor that are compatible with the symmetries. We show\ntha t the asymptotic solution of this theory valid at times much larger\nthan the timescale associated with the “non-hydrodynamical” modes\nreproduc es the well-known results previously obtained directly from\nthe AdS/CFT c orrespondence. If the QGP formed in heavy ion collisions\ncan be at least qualitatively understood in terms of strongly-coupled\nN = 4 SYM theory\, the second time derivative present in the equations\nof motion of the flui d may lead to an unexpected dependence on the\ninitial conditions for the shear stress tensor needed in numerical\nhydrodynamic simulations.\n\nhttp ://indico.cern.ch/contributionDisplay.py?contribId=321&sessionId=37&confId =181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=321&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurements of anisotropic flow($v_n$\, n=1\,2\,3\,4) in Cu + Au collisions at 200 GeV from PHENIX DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-326@cern.ch DESCRIPTION:Speakers: Dr. HUANG\, shengli (PHENIX Collaboration)\nMeasurem ents of the anisotropic flow with different order harmonic\ncoefficients ( $v_n$\, n=1\,2\,3\,4) have played a pivotal role in the\ndiscovery of the strongly coupled quark-gluon plasma (sQGP) at\nRHIC. They are also importa nt for the study of the viscous\nhydrodynamics and the extraction of the s hear viscosity over\nentropy density ($\\eta/s$). The anisotropic flow is strongly\ncoupled with the medium density\, initial geometry shape\, and\n corresponding event-by-event fluctuation. All of these elements\nwill come into play in a new way with the availability of Cu+Au\ncollisions at RHIC .\n\nThe flexibility of RHIC to collide asymmetric nuclei such as Cu +\nAu at 200 GeV can provide an asymmetric geometry and density both\nin the tr ansverse plane and longitude\, and therefore open a window\nto investigate the influence from initial geometry and density. It\nwill also help us to probe the different hydrodynamics models and\ncollision models and their properties. In this poster\, I will\npresent the work in progress for meas uring the correlation between\nthe different $v_n$ planes\, from fast prod uction data. Progress\nfor the measurements of charged hadron $v_n$ as a f unction of\ncentrality\, transverse momentum and rapidity will also be\npr esented.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=326&ses sionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=326&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Bulk properties of hot QCD matter at RHIC and LHC and Universal QG P hadronization condition DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-324@cern.ch DESCRIPTION:Speakers: PETRAN\, Michal (Czech Technical University (CZ))\nT he short lifespan of the QCD phase at RHIC and LHC suggests fast filamenti ng disintegration of the supercooled QGP state of matter. The ensemble of all produced hadrons carry information about the physical properties of t he disintegrating QGP. For example the energy content is obtained evaluati ng the energy carried by all hadrons. Considering that many of the particl es have not been measured\, extrapolation of their yields have decisive im pact on the result of the analysis of these 'bulk' properties. We presen t a strategy how to obtain precise description of the available data using a maximum-parameter phase space model. Our results show that the bulk pro perties at RHIC and LHC are extremely similar and do not differ significan tly from high energy SPS results supporting the notion that bulk QGP at ha dronization is governed by the same universal hadronization conditions cha ractrized by a common pressure and energy density. We show that the chemic al equilibrium model forcing hadron yields to equilibrate in the hadron ph ase fails both to describe the data and to produce consistent description of bulk properties across centrality and a wide energy domain\, which we achieve.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=324&ses sionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=324&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The sPHENIX Forward Upgrade DTSTART;VALUE=DATE-TIME:20120817T190000Z DTEND;VALUE=DATE-TIME:20120817T192000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-325@cern.ch DESCRIPTION:Speakers: SEELE\, Joseph (RBRC)\nDuring 12 years of operations \, PHENIX has discovered a strongly coupled QGP and studied many of its ba sic properties\, examined effects in cold nuclear matter\, measured the gl uon helicity structure of the proton\, and probed the proton transverse sp in structure. PHENIX is planning a large upgrade for the next decade\, sPH ENIX\, to answer many of the questions spurred by our discoveries during t he last decade. This sPHENIX upgrade includes replacing the central arm sp ectrometers with an open geometry solenoid surrounded by electromagnetic a nd hadronic calorimetry. With this new open geometry\, we plan to upgrade our detector at forward rapidities with additional calorimetry and tracki ng. The larger acceptance will improve our access to low-x distributions i n heavy nuclei\, extend our measurements of quarkonia in p+p\, d+A\, and A +A to more forward rapidities\, and allow for measurements away from the B jorken plateau expanding the study of the high energy heavy ion environmen t. In addition to heavy ion and cold nuclear matter measurements\, the env isioned forward rapidity upgrade will allow for a more systematic approach to understanding the large transverse spin measurements seen at RHIC as w ell as serve as the baseline detector for a future eRHIC detector\, ePHENI X.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=325&sessionId =25&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=325&sessionId=2 5&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:PHENIX Measurements of Higher-order Flow Harmonics for Identified Charged Hadrons in Au+Au Collisions at 39 – 200 GeV DTSTART;VALUE=DATE-TIME:20120814T183500Z DTEND;VALUE=DATE-TIME:20120814T185500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-328@cern.ch DESCRIPTION:Speakers: GU\, YI (D)\nCollective flow measurements continue t o play an important role in ongoing efforts to map out the temperature dep endence of the transport coefficient $\\frac{\\eta}{s}(T)$\, for the stron gly interacting matter produced in heavy ion collisions at RHIC. Recently\ , PHENIX has performed a detailed set of measurements of the higher-order flow coefficients ($v_{n}$ for n=2\,3\,4)\, for both inclusive and identif ied charged hadrons. The results from these new measurements in Au+Au col lisions will be presented\, as a function of $p_T$\, centrality and beam c ollision energy\, in concert with several scaling properties observed for these data. The role of these results as additional constraints for $\\fra c{\\eta}{s}(T)$ will also be discussed.\n\nhttp://indico.cern.ch/contribut ionDisplay.py?contribId=328&sessionId=2&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=328&sessionId=2 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Forward/backward\, reaction-plane dependent J/psi production and h adron v_n in Cu+Au collisions in PHENIX DTSTART;VALUE=DATE-TIME:20120817T203000Z DTEND;VALUE=DATE-TIME:20120817T205000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-329@cern.ch DESCRIPTION:Speakers: Dr. HOLLIS\, Richard (University of California\, Riv erside)\nThe flexibility of RHIC to collide different nuclei provides expe riments with a rich resource to systematically test models and scaling beh aviors and compare the results to those from Au+Au collisions. For an init ial evaluation of the Cu+Au collision system\, PHENIX has earmarked severa l measurements for fast analysis\, in particular\, forward/backward and ce ntral-rapidity J/psi production. These collisions promise an array of uni que geometrical configurations including odd harmonics and events where th e Cu nucleus is completely embedded within the Au. Such geometries presen t an opportunity to probe the "core" and "corona" regions of the collision (which are strongly asymmetric in Cu+Au) by measuring the reaction plane dependence of particle production. J/psi production may be more sensitive to the least dense part of the collision at the surface - the corona - th us providing a handle of the relative size of the Cu- versus Au-side coron a. An important component of this analysis is the understanding of the li ght-hadron vn(n=1\,2\,3\,4) and the correlation between the vn event plane s in these collisions\, which will reveal the underlying hydrodynamical pr operties of the system. In particular\, the odd harmonics from the Cu+Au system offer sensitivity to v3 generated from the collision geometry as op posed to fluctuations in a symmetric system. The analysis status of the r ecently taken U+U collision data\, which offers some of the same advantage s as Cu+Au\, as well as a wider range of energy densities\, will also be p resented.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=329&se ssionId=59&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=329&sessionId=5 9&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Study of higher harmonics based on (3+1)-dimensional relativistic viscous hydrodynamics DTSTART;VALUE=DATE-TIME:20120815T135000Z DTEND;VALUE=DATE-TIME:20120815T141000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-201@cern.ch DESCRIPTION:Speakers: Prof. NONAKA\, Chiho (Kobayashi-Maskawa Institute fo r the Origin of Particles and the Universe (KMI) and Department of Physic s\, Nagoya University)\nCurrently a possible origin of "Mach-Cone-like st ructure" is regarded as triangular \nflow and higher harmonics which are p roduced through event-by-event fluctuated initial states\, which is a push to implement effects of event-by-event fluctuations \nin the initial cond itions of relativistic hydrodynamic models. \nWhen the hydrodynamic simula tion is performed with initial conditions with the \nevent-by-event fluctu ation\, shock-wave capturing schemes should be used to describe \nthe hydr odynamic expansion correctly. \nHere we develop a fast numerical scheme fo r causal relativistic hydrodynamics \nwith dissipation for analyses of rel ativistic high energy collisions\, which is based on \nRef. [1]. This shoc k-wave capturing scheme for solving relativistic viscous hydrodynamic \neq uation suffers less artificial dissipative effect and is more suitable for physical \nviscosity analyses\, compared to SHASTA\, Kurganov-Tadmor (KT) and \nrHLLE schemes which are mainly used in current analyses based on \ nhydrodynamic models. \nUsing the relativistic viscous hydrodynamic model first we evaluate the viscosity \neffect in collective flow such as ellipt ic flow\, triangular flow and higher harmonics. \nIn particular\, we inve stigate the time evolution of them and discuss the relation \nbetween the initial geometry and final states. \n\n[1] M. Takamoto and S. Inutsuka\, J. Comput. Phys. 230 (2011)\, 7002.\n\nhttp://indico.cern.ch/contributionD isplay.py?contribId=201&sessionId=7&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=201&sessionId=7 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Medium-induced soft gluon distribution inside a jet DTSTART;VALUE=DATE-TIME:20120815T141000Z DTEND;VALUE=DATE-TIME:20120815T143000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-200@cern.ch DESCRIPTION:Speakers: DOMINGUEZ\, Fabio (IPhT Saclay)\nThe new studies of heavy ion collisions performed at the LHC have shown the necessity to impr ove our understanding of parton propagation and gluon emission in the pres ence of a hot QCD medium. In particular\, the ability to measure jets in h eavy ion collisions implies that\, in order to fully understand jet quench ing phenomena\, we must go beyond leading parton energy loss and attempt t o describe how the jet structure is modified by the presence of the quark- gluon plasma. In this spirit\, we study in-medium jet evolution by conside ring the multiple emission of soft gluons\, for which the formation time i s much smaller than the size of the medium. This separation of scales impl ies that one can consider the multiple emissions as independent and ordere d in time\, therefore allowing for a probabilistic interpretation where th e parton shower is built as a classical branching process.\n\nhttp://indic o.cern.ch/contributionDisplay.py?contribId=200&sessionId=11&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=200&sessionId=1 1&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Study of quark energy loss via Drell-Yan process in p+A collisions at Fermilab E906/SeaQuest experiment DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-203@cern.ch DESCRIPTION:Speakers: Dr. LIU\, Kun (Los Alamos National Laboratory)\nE906 /SeaQuest is a fixed-target experiment operated at Fermi National Accelera tor Laboratory. Using the 120 GeV proton beams from the Main Injector\, E9 06/SeaQuest measures the Drell-Yan production in the dimuon mass region of 4-8 GeV in p+p and p+A collisions over a wide xF range. Parton energy los s in QGP is considered as the dominant mechanism of the observed jet-quenc hing phenomena at RHIC and LHC. In order to clearly estimate the energy lo ss effect in QGP possibly formed in A+A collisions\, a benchmark of parton energy loss in cold (or normal) nuclear matter\, established from p+A col lisions\, is indispensible. Since the center-of-mass energy of p+A collisi ons is low and the antiquarks of nucleons inside nuclei sit out of the nuc lear shadowing region in E906/SeaQuest\, our measurementof quark energy lo ss via Drell-Yan process will provide the first clean determination of par ton energy loss effect in cold nuclear medium. E906/SeaQuest has been taki ng data since February 2012 and will continue to the end of April of this year. We will present the current status and the prospect of the parton en ergy loss measurements.\n\nhttp://indico.cern.ch/contributionDisplay.py?co ntribId=203&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=203&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Formation and decay of hadronic resonances in hot and dense nuclea r matter DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-202@cern.ch DESCRIPTION:Speakers: Dr. VOGEL\, Sascha (Frankfurt Institute for Advanced Studies)\nOne of the fundamental objectives of experiments with ultra-rel ativistic heavy ions is the study of hadronic matter at high density and h igh temperature. In this investigation we study in particular the informat ion which can be obtained by analyzing baryonic and mesonic resonances in both hadronic and leptonic decay channels. The decay products of these res onances carry information on the resonance properties at the space time po int of their decay. \nWe especially investigate the percentage of reconstr uctable resonances as a function of density for heavy ion collisions in th e energy range between $E_{lab}$ = 30~AGeV and $\\sqrt{s}$ = 200~AGeV\, th e energy domain between the future FAIR facility and the present RHIC coll ider. \nWe will show the dependency of the reconstructability of resonance s on baryon density\, which unexpectedly increases with higher density. \ nWe will explain this phenomenon by analyzing the points of origin and the transverse momentum of the resonances. The differences between RHIC and F AIR energies will be explored.\nAdditionally we study leptonic decay chann els and argue that dileptons\, contrary to the common thinking only offer a restricted view on the hot and dense phase of heavy ion collisions. \n\n Finally we will suggest measurements that might circumvent those problems. \n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=202&sessionId=3 7&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=202&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The Large Hadron-electron Collider at CERN DTSTART;VALUE=DATE-TIME:20120817T211000Z DTEND;VALUE=DATE-TIME:20120817T213000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-205@cern.ch DESCRIPTION:Speakers: STASTO\, Anna (Pennsylvania State University (US))\n The project of a new experimental facility at CERN\, the Large Hadron-elec tron Collider\, which will collide electrons against the LHC beams at cent er-of-mass energies around 1 TeV per nucleon\, will be presented. After a brief introduction and showing the proposals for accelerator and detector\ , the physics opportunities for QCD studies will be discussed. Specificall y\, I will focus on the possibilities with heavy ions\, for improving our knowledge on the parton densities\, small-x dynamics and particle producti on mechanism through inclusive\, diffractive and exclusive measurements\, plus final state studies.\n\nhttp://indico.cern.ch/contributionDisplay.py? contribId=205&sessionId=58&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=205&sessionId=5 8&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Influence of initial state fluctuations on the production of therm al photons DTSTART;VALUE=DATE-TIME:20120817T194000Z DTEND;VALUE=DATE-TIME:20120817T200000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-204@cern.ch DESCRIPTION:Speakers: Dr. CHATTERJEE\, Rupa (University of Jyväskylä)\nT hermal emission of photons from relativistic heavy ion collisions is belie ved to have a very strong temperature dependence and the high p_T thermal photons are expected to provide a glimpse of the early part of the expansi on history when the system is still in the plasma phase. Photons having p_ T > 1 GeV/c are thus specially suitable for probing fluctuations in the in itial QCD matter density distributions. We present the p_T spectra\, ratio of central to-peripheral yield and elliptic flow of thermal photons from an event-by-event ideal hydrodynamic calculation with fluctuating initial conditions (IC).\n\nWe show that fluctuations in the IC enhance the produc tion of thermal photons significantly in the range 2 2 GeV/c for mid-ce ntral collisions compared to the results from a smooth initial-state-avera ged profile [3]. We also show that these results depend strongly on the va lue of the fluctuation size scale as well as on the initial and final cond itions of the hydrodynamic calculation [3].\n\n\n[1] R. Chatterjee\, H. H olopainen\, T. Renk\, and K. J. Eskola\, Phys. Rev. C 83\, 054908 (2011)\ ; R. Chatterjee\, H. Holopainen\, T. Renk\, and K. J. Eskola\, J. Phys. G 38\, 124136 (2011).\n\n[2] R. Chatterjee\, H. Holopainen\, T. Renk\, and K. J. Eskola\, arXiv:1204.2249 [nucl-th].\n\n[3] R. Chatterjee\, H. Holopa inen\, T. Renk\, and K. J. Eskola [in preparation].\n\nhttp://indico.cern. ch/contributionDisplay.py?contribId=204&sessionId=36&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=204&sessionId=3 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Modeling the Impact Parameter Dependence of the nPDFs With EKS98 a nd EPS09 Global Fits DTSTART;VALUE=DATE-TIME:20120818T132000Z DTEND;VALUE=DATE-TIME:20120818T133000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-207@cern.ch DESCRIPTION:Speakers: HELENIUS\, Ilkka (U)\nThe knowledge of the parton di stribution functions (PDFs) is essential for interpreting any hard-process results from hadronic and nuclear collisions. The nuclear modifications o f PDFs have been successfully determined through a global DGLAP analysis e .g. in the sets EKS98 and more recently EPS09. So far the nuclear PDFs (nP DFs) in the global fits have been taken to be spatially independent. Howev er\, it can be expected that the nuclear modifications vary when going fro m the dense center of a nucleus to its more dilute edge. In this work\, us ing the $A$-dependence of the globally fitted nPDFs\, we have been able to determine the spatial dependence of the nPDFs in terms of powers of the n uclear thickness functions. A routine for public use is released. For appl ications\, we will discuss how one can then compute hard-process cross sec tions in different centrality classes of nuclear collisions. In particular \, we consider the nuclear modification factor $R_{\\rm dAu}$ for neutral pion production in deuteron-gold collisions at RHIC. Comparison with the P HENIX data in different centrality classes is also shown. In addition\, pr edictions for the corresponding nuclear modification factor $R_{\\rm pPb}$ in proton-lead collisions at the LHC are discussed. Both leading-order an d next-to-leading order results are considered.\n\nhttp://indico.cern.ch/c ontributionDisplay.py?contribId=207&sessionId=29&confId=181055 LOCATION:Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=207&sessionId=2 9&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Pseudorapidity and centrality dependence of transverse energy flow in PbPb collisions at 2.76 TeV from CMS DTSTART;VALUE=DATE-TIME:20120814T214500Z DTEND;VALUE=DATE-TIME:20120814T220500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-206@cern.ch DESCRIPTION:Speakers: Dr. MALEK\, Magdalena (University of Illinois at Chi cago (US))\nThe transverse energy flow in PbPb collisions at 2.76 TeV nucl eon-nucleon center-of-mass energy has been measured over a broad range of centrality for pseudorapidities between -5.2 and 5.2 using the CMS detecto r at the LHC. This analysis is based on 0.306/ub of data from 2010\, with recently extended number (and range) of pseudorapidity and centrality bins . The transverse energy per unit of pseudorapidity increases faster with c ollision energy than the multiplicity of charged particles. This implies t hat the mean energy per particle and hence the temperature of the system i s increasing with collision energy. The amount of transverse energy produc ed per participating nucleon increases with centrality and with collision energy. The centrality dependence of transverse energy production has only a weak dependence on pseudorapidity and collision energy. For the most ce ntral collisions\, the energy density is estimated to be 11.3 +- 0.6 GeV/f m3 at a time of 1 fm/c after the collision\, which is 2.8 times higher tha n the value reported at sqrt(sNN)=200 GeV.\n\nhttp://indico.cern.ch/contri butionDisplay.py?contribId=206&sessionId=47&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=206&sessionId=4 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Inclusive isolated photons in pp and PbPb collisions at 2.76 TeV w ith CMS DTSTART;VALUE=DATE-TIME:20120815T152000Z DTEND;VALUE=DATE-TIME:20120815T154000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-209@cern.ch DESCRIPTION:Speakers: STEPHANS\, George (Massachusetts Inst. of Technology (US))\nFinal data on isolated photon production will be presented\, measu red in both pp and PbPb collisions at a nucleon-nucleon center-of-mass ene rgy of 2.76 TeV with the CMS detector at the LHC. The isolated photon tran sverse energy (ET) spectra\, covering the pseudorapidity range |eta| 20 G eV\, are found to be in good agreement with next-to-leading-order perturba tive QCD predictions. The measured isolated photon RAA\, with a reference based on pp data\, is consistent with unity for all PbPb collision central ities.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=209&sessi onId=53&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=209&sessionId=5 3&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Inclusive jet and charged hadron nuclear modification factors in P bPb collisions at 2.76 TeV with CMS DTSTART;VALUE=DATE-TIME:20120814T212500Z DTEND;VALUE=DATE-TIME:20120814T214500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-208@cern.ch DESCRIPTION:Speakers: TONJES\, Marguerite Belt (University of Maryland (US ))\nMeasurements of charged hadron and inclusive jet transverse momentum ( pT) spectra in pp and PbPb collisions at a nucleon-nucleon center-of-mass energy of 2.76 TeV with the CMS detector will be reported. These measureme nts make use of the high-statistics jet-triggered data recorded in 2011\, including the total available PbPb luminosity of 150/ub. Charged particles are reconstructed using an iterative algorithm and spurious high-pT track s are suppressed by requiring appropriate energy deposits in the calorimet er system. Jets are reconstructed with the anti-kT algorithm\, using combi ned information from tracking and calorimetry. The charged particle and je t transverse momentum distributions are measured in the pseudorapidity ran ge of |eta|\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=208& sessionId=48&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=208&sessionId=4 8&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Two real-size high-rate MRPC modules for CBM-TOF DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-76@cern.ch DESCRIPTION:Speakers: Mr. WANG\, Jingbo (Department of Engineering Physics \, Tsinghua University\, Key Laboratory of Particle & Radiation Imaging\, Ministry of Education\, Beijing 100084\, China)\nThe Compressed Baryonic Matter experiment at the future Facility for Antiproton and Ion Research w ill use a time-of-flight (TOF) wall for hadron identification\, based on t he MRPC technology. The challenge is to keep high efficiencies (above 90%) and good time resolutions (less than 80ps) at particle fluxes up to 20kHz /cm2\, which is not accessible to conventional float-glass MRPCs. For this purpose\, a type of low-resistivity doped glass with bulk resistivity on the order of 1010 Ωcm was produced at Tsinghua University. Several high- rate prototypes based on this material have been developed and tested in b eam.\nIn the current conceptual design\, the whole CBM-TOF wall is arrange d in four “rate regions”. In the inner region of the wall (region 1)\, pad readout MRPCs based on low-resistive glass can be efficiently used to cope with the high particle fluxes and granularities (above 20 kHz/cm2)\, while strip-readout MRPCs represent a natural choice for the outer region where the system occupancy is orders of magnitude lower. Recently\, our e ffort is to realistically adapt the MRPC geometry to suit the conceptual d esign of the TOF wall. Two kinds of real-size MRPC modules made of low-res istivity doped glass were developed\, and beam tested were performed both with protons at the Electron Linac with high Brilliance and low Emittance (ELBE) facility at Helmholtz-Zentrum Dresden-Rossendorf (HZDR). \nWe summa rize here the results from the latest beam test of the two real-size modul es at ELBE facility at HZDR. The counters show high efficiencies above 90% \, and time resolutions (MRPC+FEE) down to 60ps\, at particle flux up to 1 00 kHz/cm2\, thus fulfill the CBM requirements.\n\nhttp://indico.cern.ch/c ontributionDisplay.py?contribId=76&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=76&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Bulk viscosity\, particle spectra and flow in heavy-ion collisions DTSTART;VALUE=DATE-TIME:20120815T123000Z DTEND;VALUE=DATE-TIME:20120815T125000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-75@cern.ch DESCRIPTION:Speakers: SCHAEFER\, Thomas (N)\nWe study the effects of bulk viscosity on $p_T$ spectra and \nelliptic flow in heavy ion collisions. Fo r this purpose we compute \nthe dissipative correction $\\delta f$ to the single particle \ndistribution functions in leading-log QCD\, and in kinet ic \nmodels of a hadronic resonance gas. We find that for a near \nconform al fluid the bulk viscosity is suppressed by two powers\nof the conformal breaking parameter\, but the viscous correction\nto the spectra is only su ppressed by the first power. This \nimplies that bulk viscous corrections to flow profiles are \ntypically small\, but corrections to the spectra ca n be significant.\nFrom an analysis of the spectra at RHIC and LHC we find that the\nbulk viscosity at freezeout cannot be large\, $\\zeta/s\n\nhttp ://indico.cern.ch/contributionDisplay.py?contribId=75&sessionId=7&confId=1 81055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=75&sessionId=7& confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Report from NA49 and NA61/SHINE at the CERN SPS DTSTART;VALUE=DATE-TIME:20120817T215000Z DTEND;VALUE=DATE-TIME:20120817T221000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-74@cern.ch DESCRIPTION:Speakers: RUSTAMOV\, Anar (Johann-Wolfgang-Goethe Univ. (DE))\ nRecent results from the study of nucleus-nucleus as well as \nproton-prot on collisions at the CERN SPS energies from \nexperiment NA49 and its succ essor NA61/SHINE will be summarized. \nNew results from a novel fluctuatio n analysis and from the search \nfor the critical point of strongly intera cting matter will \nbe discussed. First measurements from NA61 of the ener gy dependence \nof identified hadron production in inelastic p+p interacti ons will \nbe presented and compared with the corresponding results in cen tral \nPb+Pb collisions from NA49. In particular\, inclusive spectra and \ nmean multiplicities as well as particle fluctuations and correlations wil l be shown. Finally\, the status of the NA49 evidence for the onset of dec onfinement will be reviewed in view of new results from NA61\, STAR and AL ICE. An outlook on the NA61/SHINE program will be given.\n\nhttp://indico. cern.ch/contributionDisplay.py?contribId=74&sessionId=57&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=74&sessionId=57 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Systematic study of the dipolar flow associated with initial densi ty fluctuations in heavy ion collisions at RHIC and LHC within a multi-pha se transport (AMPT) model DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-73@cern.ch DESCRIPTION:Speakers: RADHAKRISHNAN\, Sooraj Krishnan (State University of New York (US))\nThe anisotropy associated with the initial dipole asymmet ry in heavy ion collisions is studied via the first harmonic coefficient $ v_{1\,1}$ of the two-particle azimuthal angle correlations\, within AMPT a nd HIJING model (AMPT is essentially HIJING + parton/hadron transport). Fo r a broad selection of centrality\, transverse momenta and pseudorapidity ($\\eta$)\, a fitting method is used to decompose $v_{1\,1}$ into a rapidi ty-even component\, characterized by the Fourier coefficient $v_1$\, and a global momentum conservation component. We found that the $v_{1\,1}$ data from HIJING can be entirely described by the momentum conservation compon ent\, while description of the data from AMPT requires both components. Th is proves that the rapidity-even $v_1$ is indeed a collective phenomena tr ansferred from initial dipole asymmetry by the strong final state interact ion. The extracted $v_1$ values are negative for pT \n\nhttp://indico.cern .ch/contributionDisplay.py?contribId=73&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=73&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Virtual photons and rare strange probes in resonance matter DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-71@cern.ch DESCRIPTION:Speakers: Mr. LORENZ\, Manuel (Goethe University Frankfurt)\nT he HADES experiment\, installed at the Helmholtzzentrum für Schwerionenfo rschung (GSI) accelerator facility in Darmstadt\,\ninvestigates dielectron emission and strangeness production in various collision systems (p+p\, p +n\, p+A and A+A) in the 1-3.5 AGeV regime.\nThe observed low-mass dielect ron and Ξ- enhancement in intermediate heavy-ion collisions indicates the onset of medium effects\, on the one hand\, and underlines the importance of a solid knowledge of contributions of baryon resonances on the other h and.\nThe latter turned out to be of eminent importance for the interpreta tion of the spectral shape of the ρ meson already in elementary data and moreover for the extraction of additional medium effects in p+A and A+A co llisions. Such a knowledge is gained by the analysis of exclusive hadronic channels in elementary reactions.\nIn this contribution\, we summarize th e findings of HADES and implications\, with a special emphasis on the bary on resonance contributions.\n\nhttp://indico.cern.ch/contributionDisplay.p y?contribId=71&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=71&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Hot quarkonium spectral functions from QCD sum rules and the maxim um entropy method DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-70@cern.ch DESCRIPTION:Speakers: GUBLER\, Philipp (RIKEN)\nQuarkonia spectral functio ns at finite temperature are studied \nusing QCD sum rules in combination with the maximum entropy \nmethod. This approach enables us to directly ob tain the spectral \nfunction from the sum rules\, without having to introd uce any \nspecific assumption about its functional form [1]. \nQCD sum rul es incorporate finite temperature effects in form \nof changing values of the various gluonic condensates that appear \nin the operator product expa nsion. These changes depend on the \nenergy density and pressure at finite temperature\, which we extract \nfrom lattice QCD.\nAs a result\, we find that the charmonium states J/\\psi\, \\eta_c\, \\chi_{c0} \nand \\chi_{c1 } dissolve into the continuum already at temperatures \naround or slightly above the critical temperature T_c [2]. \nAs for bottomonium\, it is foun d that \\Upsilon(1S) and \\eta_b survive in \nquark-gluon matter of temper ature up to 2.5 -3.0 T_c\, while \\chi_{b0} \nand \\chi_{b1} dissociate at 2.0 -2.5 T_c [3]. Furthermore\, we find \nevidence for the melting of the excited states \\Upsilon(2S) and \n\\Upsilon(3S) in the region of T=1.5 - 2.0 T_c [3].\n\n[1] P. Gubler and M. Oka\, Prog. Theor. Phys. 124\, 995 (2 010).\n[2] P. Gubler\, K. Morita and M. Oka\, Phys. Rev. Lett. 107\, 09200 3 (2011). \n[3] K. Suzuki\, P. Gubler\, K. Morita and M. Oka\, arXiv:1204. 1173 [hep-ph].\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=7 0&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=70&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Photons and electroweak probes in ATLAS DTSTART;VALUE=DATE-TIME:20120816T132000Z DTEND;VALUE=DATE-TIME:20120816T134500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-655@cern.ch DESCRIPTION:Speakers: STEINBERG\, Peter Alan (Brookhaven National Laborato ry (US))\nhttp://indico.cern.ch/contributionDisplay.py?contribId=655&sessi onId=14&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=655&sessionId=1 4&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Derivation of transient relativistic fluid dynamics from the Boltz mann equation for a multi-component system DTSTART;VALUE=DATE-TIME:20120814T195500Z DTEND;VALUE=DATE-TIME:20120814T201500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-79@cern.ch DESCRIPTION:Speakers: DENICOL\, Gabriel (Frankfurt University)\nWe present a general derivation of relativistic fluid dynamics from the relativistic Boltzmann equation using the method of moments [1]. The main difference b etween our approach and the traditional 14-moment approximation is that we do not close the fluid-dynamical equations of motion by truncating the ex pansion of the single-particle momentum distribution function. Instead\, w e keep all the terms in the moment expansion and truncate the exact equati ons of motion for these moments according to a systematic power counting s cheme in Knudsen and inverse Reynolds numbers. We apply this formalism to obtain an approximate expression for the non-equilibrium single-particle m omentum distribution function of a hadron resonance gas. Then\, we investi gate the implications of our new formalism in the freeze-out description o f the hadron resonance gas and compare it with the method traditionally us ed in heavy-ion collisions\, the 14-moment approximation.\n\n[1] G.S. Deni col\, H. Niemi\, E. Molnar\, and D.H. Rischke\, arXiv:1202.4551 [nucl-th]. \n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=79&sessionId=2& confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=79&sessionId=2& confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The statistical model in Pb-Pb collisions at the LHC DTSTART;VALUE=DATE-TIME:20120816T182000Z DTEND;VALUE=DATE-TIME:20120816T184000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-78@cern.ch DESCRIPTION:Speakers: BRAUN-MUNZINGER\, Peter (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))\nWe investigate\, using the newest LHC da ta\, the energy\ndependence of hadron production within the framework of t he\nstatistical hadronization model. The data are confronted with\npredict ions based on extrapolation from lower (RHIC) energies. While\nthe yields of hadrons made from light (u\,d\,s) quarks generally exhibit\nlittle chan ge apart from the overall increase in\nmultiplicity\, a characteristic ene rgy dependence is observed for J/psi\nproduction. This feature is well des cribed by statistical generation\nof J/$\\psi$ mesons at the phase boundar y\, as predicted in [1\,2]. \nWe also search for possible deviations from the statistical picture \nin the yields of (anti-)baryons and light (anti- )nuclei. \n\n\n[1] P. Braun-Munzinger\, J. Stachel\,\nPhys. Lett. B 490 (2000) 196.\n[2] A. Andronic\, P. Braun-Munzinger\, K. Redlich\, J. Stach el\, \nNucl. Phys. A 789 (2007) 334\; Phys. Lett. B 652 (2007) 259.\n\nhtt p://indico.cern.ch/contributionDisplay.py?contribId=78&sessionId=15&confId =181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=78&sessionId=15 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Future of RHIC DTSTART;VALUE=DATE-TIME:20120818T123000Z DTEND;VALUE=DATE-TIME:20120818T125500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-669@cern.ch DESCRIPTION:Speakers: NAGLE\, jamie (University of Colorado)\nhttp://indic o.cern.ch/contributionDisplay.py?contribId=669&sessionId=28&confId=181055 LOCATION:Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=669&sessionId=2 8&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Recent theory developments describing the strongly coupled plasma DTSTART;VALUE=DATE-TIME:20120817T161500Z DTEND;VALUE=DATE-TIME:20120817T164000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-668@cern.ch DESCRIPTION:Speakers: YEE\, Ho-Ung (SUNY\, Stony Brook)\nhttp://indico.cer n.ch/contributionDisplay.py?contribId=668&sessionId=34&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=668&sessionId=3 4&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:EIC/LHeC DTSTART;VALUE=DATE-TIME:20120817T155000Z DTEND;VALUE=DATE-TIME:20120817T161500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-667@cern.ch DESCRIPTION:Speakers: DESHPANDE\, Abhay (Stony Brook University)\nhttp://i ndico.cern.ch/contributionDisplay.py?contribId=667&sessionId=34&confId=181 055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=667&sessionId=3 4&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:QCD at high parton density (eA\, pA\, ... ) DTSTART;VALUE=DATE-TIME:20120817T152500Z DTEND;VALUE=DATE-TIME:20120817T155000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-666@cern.ch DESCRIPTION:Speakers: MARQUET\, Cyrille ()\, MARQUET\, Cyrille Michel (Uni versidade de Santiago de Compostela (ES))\, MARQUET\, Cyrille (Theory Divi sion - CERN)\nhttp://indico.cern.ch/contributionDisplay.py?contribId=666&s essionId=34&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=666&sessionId=3 4&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Results on particle correlations from ALICE DTSTART;VALUE=DATE-TIME:20120817T143000Z DTEND;VALUE=DATE-TIME:20120817T145500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-665@cern.ch DESCRIPTION:Speakers: ADARE\, Andrew Marshall (Yale University (US))\nhttp ://indico.cern.ch/contributionDisplay.py?contribId=665&sessionId=33&confId =181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=665&sessionId=3 3&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:EbyE observables and fluctuations DTSTART;VALUE=DATE-TIME:20120817T140500Z DTEND;VALUE=DATE-TIME:20120817T143000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-664@cern.ch DESCRIPTION:Speakers: PETERSEN\, Hannah ()\nhttp://indico.cern.ch/contribu tionDisplay.py?contribId=664&sessionId=33&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=664&sessionId=3 3&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Discussion on Exploring the QCD Phase Diagram DTSTART;VALUE=DATE-TIME:20120817T135000Z DTEND;VALUE=DATE-TIME:20120817T140500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-663@cern.ch DESCRIPTION:Speakers: \nhttp://indico.cern.ch/contributionDisplay.py?contr ibId=663&sessionId=33&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=663&sessionId=3 3&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Fluctuations: from theory to observables DTSTART;VALUE=DATE-TIME:20120817T133000Z DTEND;VALUE=DATE-TIME:20120817T135000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-662@cern.ch DESCRIPTION:Speakers: SKOKOV\, Vladimir (Brookhaven national laboratory)\n http://indico.cern.ch/contributionDisplay.py?contribId=662&sessionId=33&co nfId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=662&sessionId=3 3&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Phase diagram and fluctuations from Lattice QCD DTSTART;VALUE=DATE-TIME:20120817T131000Z DTEND;VALUE=DATE-TIME:20120817T133000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-661@cern.ch DESCRIPTION:Speakers: BORSANYI\, Szabolcs (University of Wuppertal)\nhttp: //indico.cern.ch/contributionDisplay.py?contribId=661&sessionId=33&confId= 181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=661&sessionId=3 3&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:PHENIX Beam Energy Scan DTSTART;VALUE=DATE-TIME:20120817T125000Z DTEND;VALUE=DATE-TIME:20120817T131000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-660@cern.ch DESCRIPTION:Speakers: O'BRIEN\, Edward (BNL)\nhttp://indico.cern.ch/contri butionDisplay.py?contribId=660&sessionId=33&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=660&sessionId=3 3&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:PHENIX Low Mass Di-leptons DTSTART;VALUE=DATE-TIME:20120816T125500Z DTEND;VALUE=DATE-TIME:20120816T132000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-653@cern.ch DESCRIPTION:Speakers: TSERRUYA\, Itzhak (Weizmann Institute of Science (IL ))\nhttp://indico.cern.ch/contributionDisplay.py?contribId=653&sessionId=1 4&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=653&sessionId=1 4&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Visualizing the "little bangs": Simulations and visualizations of relativistic heavy ion collisions DTSTART;VALUE=DATE-TIME:20120812T170000Z DTEND;VALUE=DATE-TIME:20120812T174000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-692@cern.ch DESCRIPTION:Speakers: PETERSEN\, Hannah ()\nhttp://indico.cern.ch/contribu tionDisplay.py?contribId=692&sessionId=39&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=692&sessionId=3 9&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Peering through the haze: Reconstructing the QGP's properties DTSTART;VALUE=DATE-TIME:20120812T174000Z DTEND;VALUE=DATE-TIME:20120812T183500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-693@cern.ch DESCRIPTION:Speakers: LISA\, Mike (Ohio State University (US))\nhttp://ind ico.cern.ch/contributionDisplay.py?contribId=693&sessionId=39&confId=18105 5 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=693&sessionId=3 9&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Quest for the QGP DTSTART;VALUE=DATE-TIME:20120812T193000Z DTEND;VALUE=DATE-TIME:20120812T203000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-690@cern.ch DESCRIPTION:Speakers: ZAJC\, Bill (Columbia University)\nhttp://indico.cer n.ch/contributionDisplay.py?contribId=690&sessionId=61&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=690&sessionId=6 1&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Proton-Nucleus collisions at LHC and Electron-Nucleus collisions at an EIC DTSTART;VALUE=DATE-TIME:20120812T211500Z DTEND;VALUE=DATE-TIME:20120812T221500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-691@cern.ch DESCRIPTION:Speakers: ARMESTO PEREZ\, Nestor (Universidade de Santiago de Compostela (ES))\nhttp://indico.cern.ch/contributionDisplay.py?contribId=6 91&sessionId=60&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=691&sessionId=6 0&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Unexpected connections: Hot quark matter\, black holes\, and super string theory DTSTART;VALUE=DATE-TIME:20120812T183500Z DTEND;VALUE=DATE-TIME:20120812T191500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-695@cern.ch DESCRIPTION:Speakers: CHESLER\, Paul (MIT)\nhttp://indico.cern.ch/contribu tionDisplay.py?contribId=695&sessionId=39&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=695&sessionId=3 9&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Late Result - Ds RAA from ALICE DTSTART;VALUE=DATE-TIME:20120815T162000Z DTEND;VALUE=DATE-TIME:20120815T164000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-699@cern.ch DESCRIPTION:Speakers: INNOCENTI\, Gian Michele (Universita e INFN (IT))\nT he measurement of heavy-flavour production provides insights on the proper ties of the high-density QCD medium created in heavy-ion collisions.\nIn p articular\, the comparison of charm production in pp and in Pb-Pb collisio ns allows to study the mechanism of in-medium energy loss of heavy quarks. Furthermore\, since strange quarks are abundant in the medium\, the relat ive yield of D+s mesons with respect to non-strange charm mesons (D0 and D +) is predicted to be largely enhanced if in-medium hadronization is the d ominant mechanism for charm hadron formation in the low momentum region.\n We will present the measurement of the D+s production in pp collisions at sqrt{s} = 7 TeV and in Pb-Pb collisions at sqrt{s_NN} =2.76 TeV performed with the ALICE detector at central rapidity through the exclusive reconstr uction of the hadronic decay channel D+s --> Phi pi+ --> K+K-pi+. The rati os between the yields of D+s and non-strange D mesons as a function of the transverse momentum will be shown for both pp and Pb-Pb collisions.\n\nht tp://indico.cern.ch/contributionDisplay.py?contribId=699&sessionId=51&conf Id=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=699&sessionId=5 1&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Charge azimuthal correlations at RHIC and LHC energies DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-542@cern.ch DESCRIPTION:Speakers: MA\, Guo-Liang (Shanghai INstitute of Applied Physic s (SINAP)\, CAS)\nWith a multi-phase transport model including initial cha rge separation and string melting\, the charge azimuthal correlations for Au+Au collisions at center of mass energies 200\, 39\, 11.5\, 7.7 GeV and Pb+Pb collisions at 2.76 TeV are investigated. Initial charge separations of about 10 % for 200 GeV\, 5 % for 39 GeV\, 0 % for 11.5 GeV appear to be necessary. This is consistent with decreasing Chiral Magnetic Effect as t he incident energy decreases at RHIC. A reduced partonic interaction cross section is also needed for 11.5 GeV\, indicating possible significant con tributions from the hadronic stage. For Pb+Pb collisions at 2.76 TeV\, 10% initial charge separation can produce similar behaviors as those at the t op RHIC energy. We will also discuss how the same-charge correlation of c hanges sign from negative at RHIC to positive at the LHC.\n\nReference:\n[ 1] Guo-Liang Ma and Bin Zhang\, Phys. Lett. B 700 (2011) 39–43\, arXiv:1 101.1701 [nucl-th].\n\nhttp://indico.cern.ch/contributionDisplay.py?contri bId=542&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=542&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Charge dependent azimuthal correlations of K-Pi pairs at STAR DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-540@cern.ch DESCRIPTION:Speakers: RILEY\, Charles (Yale University)\nThree-particle co rrelations have been used to probe for local parity violation (LPV) in the quark-gluon plasma (QGP) formed during Au+Au collisions at $\\sqrt{s_{NN} }$ = 200 GeV at RHIC [1]. Further expanding on this analysis\, we present our results on looking at these correlations through pairing kaons and pio ns produced during the collision events (while fixing the third particle t o be another pion). The idea behind looking at kaon-pion (K-Pi) correlatio ns is that the two-body correlations between these distinct particles are weaker than those between pions with themselves. It may be that the tenden cy of two pions to be emitted at small angles to one another can be an imp ortant ingredient in a strong interaction background [2]. Hence\, looking at K-Pi correlations may reduce potential effects from such backgrounds an d possibly other parity-even effects that may contribute to the three-part icle correlator.\n\nWe present charge dependent azimuthal correlations bet ween pions and kaons identified by using the Time-Of-Flight detector as a function of centrality\, $\\delta\\eta$ and $\\deltap_{T}$ between pairs i n Au+Au collisions at $\\sqrt{s_{NN}}$ = 200 GeV. Modifications depending on elliptic flow are also applied to the correlators as an additional meas ure to possibly reduce P-even background effects on the three-particle cor relators.\n\n[1] B. I. Abelev et al.\, Phys. Rev. C81 (2010) 54908.\n\n[2] S. Schlichting and S. Pratt\, arXiv:1005.5341v3 [nucl-th] (2010).\n\nhttp ://indico.cern.ch/contributionDisplay.py?contribId=540&sessionId=37&confId =181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=540&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:High-pT direct photons in nuclear collisions: from RHIC to LHC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-546@cern.ch DESCRIPTION:Speakers: CEPILA\, Jan (Czech Technical University (CZ))\nWe d iscuss a production of direct photons at large transverse momenta p_T in n uclear collisions at different energies and rapidities corresponding to RH IC and LHC experiments. Direct photons are very convenient tool for invest igation of nuclear effects since \nthey are not expected to be accompanied by any final state interaction\, either energy loss or absorption. Theref ore\, besides the Cronin enhancement at medium-high p_T and small isotopic corrections at larger p_T\, one should not expect any nuclear effects. Ho wever\, data from the PHENIX experiment at mid-rapidities demonstrate a si gnificant large-p_T suppression in central d+Au and Au+Au collisions that cannot be induced by coherent phenomena (gluon shadowing\, Color Glass Con densate). We demonstrate that such an unexpected result is a subject to th e energy conservation constraints (ECC) in initial state multiple parton i nteractions. The corresponding suppression factor falls steeply with p_T a nd leads to rather strong decrease with p_T of the nuclear modification fa ctor violating so QCD factorization. In the RHIC kinematic region at forwa rd rapidities we include also coherent phenomena as an additional source o f nuclear suppression. In the LHC energy range ECC effects are irrelevant at mid-rapidities\, but they are going to be important with increasing rap idity. We study for the first time a relative contribution of both sources of nuclear suppression at different rapidities performing predictions tha t could be verified in the future by experiments at RHIC and LHC. We analy ze also a contribution of gluon shadowing as a leading twist shadowing cor rection modifying nuclear effects especially at small p_T.\n\nhttp://indic o.cern.ch/contributionDisplay.py?contribId=546&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=546&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Direct Photon and Lepton Pair Production from Viscous quark-gluon plasma DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-8@cern.ch DESCRIPTION:Speakers: SINHA\, Bikash (V)\nWe have studied the effect of sh ear viscosity effects on direct photons as well as lepton pair production from Quark Gluon Plasma (QGP). The production rate for both these two ther modynamic signals gets modified due to: (i) changed space-time evolution o f the viscous fluid and (ii) non-equilibrium correction to the equilibrium distribution function. The non-equilibrium correction grows with viscosit y as well as transverse momentum. Viscous effects on photon production are strong [1]. The space-time evolution of QGP was obtained by solving Israe l-Stewart’s second order hydrodynamics for $\\sqrt_{NN}$=200 GeV Au+Au c ollisions. Effect of viscosity is to stiffen the dilepton spectra and redu ce the elliptic flow [2]. Although\, the rate of applicability is limited in the pT range due to non-equilibrium effects\, the thermometric signals can limit the initial temperature and viscosity\, the ratios of dileptons to photons it is expected\, can be a fairly good measure of viscosity with out the uncertainty of initial conditions. Shear viscosity per entropy\, i t seems\, does not change appreciably going from RHIC to LHC. We intend to explore this puzzle.\n\n[1] A.K. Chaudhuri and Bikash Sinha\, Phys. Rev. C 83\, 03405 (2011)\n[2] A.K. Chaudhuri and Bikash Sinha\, to be publish ed\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=8&sessionId=3 7&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=8&sessionId=37& confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Strange Quark Nuggets as Baryonic Dark matter from the Relics of C osmic QCD Phase transition DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-548@cern.ch DESCRIPTION:Speakers: SINHA\, Bikash ()\nThe universe is assumed to begin with a large baryonic chemical potential acquired through an Affleck – D ine mechanism\, which leads on to a baryon asymmetry of 0(1) without requi ring superhigh temperatures. However\, the observed baryon asymmetry of 0( 10-10) at CMB temperature needs to emerge naturally from such a scenario. This is what could be achieved through a “little inflation” of about 7 e – folding leading to a QCD first order transition [1]\, while remaini ng in a deconfined and in a chirally symmetric phase. It was demonstrated [2] using chromoelectric flux-tube fission model that some strange quark “nuggets” (SQN) [3] with an initial baryon number ~ 1044 or more can survive the evaporation process and be stable on cosmological time scales. We demonstrate that these SQN’s are natural candidates for baryonic dar k matter. We also argue that these SQNs\, together with the natural requir ement that the total baryon number of the universe is an integer [4]\, can explain the occurrence of the cosmological dark energy within the standar d model of particle physics.\n\n[1] T. Boeckel and J. Schaffner – Bieli ch\, Phys. Rev. Lett. 105\, 041301 (2010)\n[2] P. Bhattacharjee et. al. P hys. Rev. D 48 \, 4630 (1993)\n[3] E. Witten\, Phys. Rev. D 30 272 (1984) \n[4] S. Banerjee et al. Phys. Lett. B611\, 27 (2005)\n\nhttp://indico.ce rn.ch/contributionDisplay.py?contribId=548&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=548&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Constraining properties of the deconfined state of matter with CHI MERA DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-120@cern.ch DESCRIPTION:Speakers: Dr. GARISHVILI\, Irakli (Lawrence Livermore National Laboratory)\nConstraining properties of the strongly interacting state of matter produced in relativistic heavy ion collisions at RHIC and LHC\, su ch as eta/s and T_{init} is one of the biggest priorities in the field of heavy ion physics. For this purpose\, we have developed CHIMERA\, a frame work for performing global statistical evaluation of multiple QGP signatur es by comparing key soft observables (spectra\, HBT and elliptic flow) mea sured at LHC and RHIC to the results from our multi-stage hydrodynamics/ha dron cascade model of heavy ion collision. The unique feature of CHIMERA i s that both statistical and systematic uncertainties are used in the evalu ation procedure\, and these uncertainties are fully propagated in the\ndet ermination of the temperature and viscosity to entropy ratio.\n\nThe CHIME RA model incorporates different initial state conditions\, pre-equilibrium flow\, the UVH2+1 viscous hydro model\, Cooper-Frye freezeout\, and the U rQMD hadronic cascade model. For hydrodynamical evolution\, several differ ent equations of state (EoS) \, including those derived from the hadron re sonance gas model and lattice QCD\, are used to test the sensitivity of th e observables to a particular choice of EoS.\n\nFor a particular selection of initial conditions and pre-equilibrium flow we consider T_{init}-eta/s grid. For each grid point and a particular observable we evaluate the ext ent of agreement between the model and experimental data by calculating ch i-squared values. The latest CHIMERA results of comparing LHC data to the results from our heavy ion collision model optimized for LHC energies wil l be presented.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId= 120&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=120&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Beam Energy Dependent Charge Balance Functions in Heavy Ion Collis ions at STAR DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-121@cern.ch DESCRIPTION:Speakers: WANG\, Hui (Michigan state university)\nThe study of correlations between opposite sign charge pairs can provide a powerful to ol to probe the properties of the quark-gluon plasma (QGP). The balance fu nction\, which measures the correlations between opposite sign charge pair s\, is sensitive to the mechanisms of charge formation and the subsequent relative diffusion of the balancing charges. The study of the balance func tion can provide information about charge creation time as well as the sub sequent collective behavior of particles. \n\nWe will present charge balan ce function results for relative pseudorapidity and azimuthal angle from Au+Au collisions at $\\sqrt{s_{NN}}$ = 7.7 to 200 GeV from the recent RHI C beam energy scan. Results from new measurements of balance function at $ \\sqrt{s_{NN}}$ = 19.6 and 27 GeV are added to the suite of observations. We will also present balance function results in terms of relative rapidit y and Lorentz invariant momentum difference between the two particles for identified pions\, kaons and protons using STAR Time Of Flight (TOF) detec tor. The normalized balance function width ($W$ parameter)~\\cite{NA49_bal ance_2007} is applied to compare different experimental measurements of th e width of the balance function in terms of relative pseudorapidity. UrQMD transport model calculations are also compared with data.\n\n\n\n\\bibite m{NA49_balance_2007}\nC. Alt {\\it et al.} [NA49 Collaboration]\,\nPhys. R ev. C {\\bf 76}\, 024914 (2007).\n\nhttp://indico.cern.ch/contributionDisp lay.py?contribId=121&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=121&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Dynamic enhancement of event-by-event fluctuations at the critical point and domain formation at the first order phase transition of QCD DTSTART;VALUE=DATE-TIME:20120817T194000Z DTEND;VALUE=DATE-TIME:20120817T200000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-122@cern.ch DESCRIPTION:Speakers: Dr. NAHRGANG\, Marlene ()\nStrong fluctuations in ob servables are believed to provide decisive signals for identifying phase t ransitions of QCD in relativistic heavy-ion collisions. To study this poss ibility under realistic conditions of the expansion and the cooling of the fireball we performed dynamic simulations within our approach of nonequil ibrium chiral fluid dynamics. Based on an effective phase transition model \, chiral fields and their fluctuations propagate explicitly within a medi um that expands fluid dynamically. The interaction between the fields and the fluid leads to dissipation and noise\, which in turn affect the chiral propagation. In this talk we present the consequences of this coupled dyn amics for different phase transition scenarios.\nIn the case of a first or der phase transition we observe the development of a highly supercooled st ate. This leads to the dynamic formation and decay of domains of the chira lly-symmetric phase in a chirally-broken environment and can be seen in si ngle event studies. At the critical point\, due to large relaxation times\ , we find that critical slowing down weakens the critical phenomena. Howev er\, for the first time we are able to demonstrate in a dynamic and realis tic study the basic features of a critical point: the growth of the correl ation length and the enhancement of event-by-event fluctuations of the sig ma field. It is\, therefore\, expected that both\, the first order phase t ransition and the critical point develop their characteristic signals in h eavy-ion collisions.\n\nhttp://indico.cern.ch/contributionDisplay.py?contr ibId=122&sessionId=24&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=122&sessionId=2 4&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Initial state fluctuations and higher harmonic flow in heavy-ion c ollisions DTSTART;VALUE=DATE-TIME:20120815T125000Z DTEND;VALUE=DATE-TIME:20120815T131000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-123@cern.ch DESCRIPTION:Speakers: SCHENKE\, Bjoern ()\nWe present recent developments in describing anisotropic flow in heavy-ion collisions at the Relativistic Heavy-Ion Collider (RHIC) at Brookhaven National Laboratory and the Large Hadron Collider (LHC) at CERN with a relativistic 3+1 dimensional viscous event-by-event hydrodynamic simulation.\nWe present results for elliptic\ , triangular and higher harmonic flow coefficients\, including comparisons to first experimental data as well as predictions. We demonstrate the gre at potential of a systematic study of higher harmonic and directed flow to pin down the shear viscosity to entropy density ratio of the created quar k gluon plasma and the details of the initial state.\n\nhttp://indico.cern .ch/contributionDisplay.py?contribId=123&sessionId=7&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=123&sessionId=7 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of energy dependence of $K/\\pi$ fluctuation in STAR e xperiment at RHIC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-124@cern.ch DESCRIPTION:Speakers: AHAMMED\, Zubayer (Department of Atomic Energy (IN)) \n\\documentclass[prc\,aps\,nofootinbib\,%\ntightenlines\,superscriptaddre ss\,floatfix\,\npreprintnumbers]{revtex4}\n\\usepackage{bbm}\n\\usepackage {graphicx}\n\\usepackage{amsmath}\n\\usepackage{amsfonts\,amsbsy}\n\\usepa ckage{amssymb}\n\n\\renewcommand{\\thefigure}{\\arabic{figure}}\n\\newcomm and{\\ndyn}{\\nu_{dyn}}\n\\newcommand{\\gc}{{\\gamma-\\mathrm{ch}}}\n\n\\b egin{document}\n\\title{Measurement of energy dependence of $K/\\pi$ fluct uation in STAR experiment at RHIC}\n\\author{Zubayer Ahammed}\n\\affiliati on{Variable Energy Cyclotron Centre\, 1/AF Bidhan Nagar\, Kolkata-700064\, India}\n\\collaboration{for the STAR collaboration}\n\n\\maketitle\n\n\\p reprint{ }\nEvent-by-event fluctuations in strangeness may reveal the natu re of Quark Gluon Plasma(QGP) phase transition and can be used as a probe for QCD critical point \\cite{1}. Dynamical fluctuations in $K/\\pi$ at lo wer beam energy were reported to increase with decreasing $\\sqrt{s_{NN}}$ \\cite{2} while they remained constant at higher $\\sqrt{s_{NN}}$. STAR r esults for the study of $K/\\pi$ fluctuations have been reported earlier f or Au+Au collisions at $\\sqrt{s_{NN}}$ = 7.7\, 11.5\, 39\, 62.4\, 130 and 200 GeV\\cite{3\,4}.The results have been found to be independent of beam energy. In this poster\, we report new results on event-by-event fluctuat ions in $K/\\pi$ at midrapidity from 19.6 and 27 GeV Au+Au collisions. The use of Time Projection Chamber(TPC) and Time of Flight(TOF) detector all ows particle identification up to $p_{T}$ $\\sim${\\it{1.6 GeV/c}}. The ad vantage of this large particle identification reach in momentum and using a collider facility for $K/\\pi$ fluctuation studies will be discussed. Th e results will be compared with the prediction of a transport model(UrQMD) and statistical hadronization model \\cite{5}.\n%The status of this analy sis and some preliminary results for RHIC BES program will also be present ed in the context of energy dependence of $\\gc$ correlation.J.I Kapusta a nd Mekjien\, Phys.\\ Rev. D {\\bf 33} 1304(1986).\n\\begin{thebibliography }{5}\n\\bibitem{1}\nJ.I Kapusta and Mekjien\, Phys.\\ Rev. D {\\bf 33} 130 4(1986).\n\\bibitem{2}\n S.V. Afanasiev et. al.(NA49 Collaboration)\, Phys .\\ Rev.\\ Lett {\\bf 86}\, 1965(2001).\n\\bibitem{3}\nB.I. Abelev et. al. (STAR Collaboration)\,\n Phys.\\ Rev.\\ Lett {\\bf 103}\, 092301 (2009) .\n\\bibitem{4}\nTerrence J. Tarnowsky(STAR Collaboration)\,\n J.\\ Phys .\\ G {\\bf G38}\, 124054 (2011).\n\\bibitem{5}\nGiorgi Torrieri\, Nucl-t h/072062(2007).\n\\end{thebibliography}\n\n\\end{document}\n\nhttp://indic o.cern.ch/contributionDisplay.py?contribId=124&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=124&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:A Study of High-pT/High-mass Dielectron Production through Trigger Combination in 200 GeV Au+Au Collisions at STAR DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-125@cern.ch DESCRIPTION:Speakers: JUNG\, Kurt (Purdue University (US))\nDileptons are unique probes of the strongly-coupled Quark Gluon Plasma (QGP) created in relativistic heavy-ion collisions. Compared to hadrons\, leptons have lit tle interaction with the QGP medium and can thus travel through the entire system with most of the original information intact. This feature allows us to study the properties of the medium during its space-time evolution. The low mass region (LMR\, m \n\nhttp://indico.cern.ch/contributionDispla y.py?contribId=125&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=125&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The Hadron Resonance Gas at the Boundary of the Hadronic World DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-126@cern.ch DESCRIPTION:Speakers: WINN\, Michael (Ruprecht-Karls-Universitaet Heidelbe rg (DE))\nWe investigate the impact of interactions in the hadron resonanc e gas (HRG) modelled by a volume assigned to the hadrons in a thermodynam ically consistent way. We discuss the influence of the hadron radius\, a p arameter of the model\, on thermodynamic quantities as energy density\, e ntropy density and pressure. The consideration of interactions is followed by us arguing that the commonly used free HRG is not an appropriate descr iption in the dense environment near the phase boundary/rapid cross-over a nd shows in this region clear signs of the Hagedorn divergence. This is ta med in our model including interactions\, so that we associate the strong rise of the thermodynamic quantities observed in recent lattice quantum ch romodynamics calculations with deconfinement.\n\nhttp://indico.cern.ch/con tributionDisplay.py?contribId=126&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=126&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:How do Jets Affect the Collective Flow of the Quark-Gluon Plasma? DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-127@cern.ch DESCRIPTION:Speakers: ANDRADE\, Rone (Universidade de São Paulo USP)\nIn this work we study how highly energetic jets affect the hydrodynamic evolu tion of the quark-gluon plasma in an event-by-event basis. This is done b y the introduction of a source term [1] in the energy-momentum conservatio n equation that describes the evolution of inviscid hydrodynamics (with a realistic equation of state [2]). The source is parametrized in terms of t he direction of the jet in the medium and its energy loss rate. The influe nce of jets on the QGP collective flow is systematically investigated usin g the Fourier coefficients of the azimuthal flow distribution computed at both RHIC and LHC energies. In addition\, we discuss the structure of the two-particle correlation function taking into account both initial state f luctuations [3\,4] and the effects of jets. While the propagation of jets in a smooth QGP has been extensively studied before\, the interplay betwee n the different sources of flow anisotropy (i.e\, initial state fluctuatio ns and jets) studied in this work poses some new questions about the hydro dynamical evolution of the QGP. For instance\, can Mach cones consistently form in an event-by-event basis? Do the highly high energetic jets presen t at LHC lead to novel structures in the two-particle correlation function ? In this presentation we intend to shed some light on such questions.\n\n [1] A.K.Chaudhuri and U.Heinz\, Effect of jet quenching on the hydrodynami cal evolution of QGP\, Phys. Rev. Lett. 97\, 062301 (2006)\; B.Betz\, J.No ronha\, G.Torrieri\, M.Gyulassy and D.H.Rischke\, Universal Flow-Driven Co nical Emission in Ultrarelativistic Heavy-Ion Collisions\, Phys. Rev. Lett . 105\, 222301 (2010).\n\n[2] P.Huovinen and P.Petreczky\, QCD Equation of State and Hadron Resonance Gas\, Nucl. Phys. A 837\, 26 (2010).\n\n[3] J. Takahashi\, B.M.Tavares\, W.L.Qian\, R.Andrade\, F.Grassi\, Y.Hama\, T.Kod ama\, N.Xu\, Topology studies of hydrodynamics using two particle correlat ion analysis\, Phys. Rev. Lett. 103\, 242301 (2009).\n\n[4] Y.Hama\, R.P.G .Andrade\, F.Grassi\, W.-L.Qian\, Trying to understand the ridge effect in hydrodynamic model\, Nonlin. Phenom. Complex Syst. 12\, 466-470 (2009).\n \nhttp://indico.cern.ch/contributionDisplay.py?contribId=127&sessionId=37& confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=127&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Evolution of singularities in unequal time two-point correlator in formation of QGP DTSTART;VALUE=DATE-TIME:20120817T203000Z DTEND;VALUE=DATE-TIME:20120817T205000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-128@cern.ch DESCRIPTION:Speakers: LIN\, Shu ()\nOne of the most difficult problems sti ll to be understood is the mechanism of fast thermalization in heavy ion c ollisions. The problem involves dynamics in strong coupling regime and phy sics far from equilibrium\, therefore is hardly tractable by usual method. The gauge/gravity duality naturally maps the formation of quark gluon pla sma to another fundamental problem in black hole physics: information loss in a gravitational collapse process. The present work summarizes our rece nt results on the study of a particular probe: unequal time two-point corr elator for gauge theory in the evolution toward thermal equilibrium. In [1 ]\, we found that near equilibrium the spectral functions showed a univers al pattern as field equilibrates in a quasi-static approximation. We have then systematically extended the previous work to the far from equilibrium region by using the coordinate representation. In the past two years we h ave developed a divergence matching method in computing the singularities of the unequal time two-point correlator in a time-dependent background. W e found the singularities have a nice interpretation with a geometric opti cs picture [2\,3]. Applying this method to the gravitational collapse mode l\, we found the singularities of the unequal time correlator shifted from the real time to the complex time in the formation of QGP [4]. This signa ture sheds more light on the mechanism of the thermalization and may have interesting implications to heavy ion phenomenology and experiments.\n\n[1 ] S.~Lin and E.~Shuryak\,\n %``Toward the AdS/CFT Gravity Dual for High E nergy Collisions. 3. Gravitationally Collapsing Shell and Quasiequilibrium \,''\n Phys.\\ Rev.\\ D {\\bf 78}\, 125018 (2008)\n [arXiv:0808.0910 [he p-th]].\n\n[2] J.~Erdmenger\, S.~Lin and T.~H.~Ngo\,\n %``A Moving mirror in AdS space as a toy model for holographic thermalization\,''\n JHEP {\ \bf 1104}\, 035 (2011)\n [arXiv:1101.5505 [hep-th]].\n\n[3] J.~Erdmenger\ , C.~Hoyos and S.~Lin\,\n %``Time Singularities of Correlators from Diric hlet Conditions in AdS/CFT\,''\n JHEP {\\bf 1203}\, 085 (2012)\n [arXiv: 1112.1963 [hep-th]].\n\n[4] J.~Erdmenger and S.~Lin\, to appear\n\nhttp:// indico.cern.ch/contributionDisplay.py?contribId=128&sessionId=38&confId=18 1055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=128&sessionId=3 8&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:From dileptons to chiral symmetry restoration: Sum rules and the a xial-vector spectral function. DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-129@cern.ch DESCRIPTION:Speakers: HOHLER\, Paul (Texas A&M University)\nThe medium mod ifications of vector and axial-vector spectral functions are investigated using Weinberg and QCD sum rules in an attempt to establish chiral symmetr y restoration. Such a study is essential for the interpretation of a perti nent signal from dilepton data in heavy-ion collisions. We start from vacu um spectral functions which include both ground- and excited-state resonan ces for both the vector and axial-vector channels\, supplemented by an ide ntical perturbative continuum. The vacuum spectral functions are construct ed to agree with tau decay data and Weinberg sum rules. In the medium\, th e rho spectral function is\ntaken from effective hadronic many-body theory which is consistent with available dilepton data. The in-medium propertie s of the rho' are constrained by satisfying the in-medium QCD sum rule. Fo r the axial-vector channel\, different ansaetze are chosen for the in-medi um a1 (broadening\, mass drop\, two-level model)\, while the medium modifi cation of the excited state is again constrained by the QCD sum rule. Thes e different ansaetze are then tested for chiral symmetry restoration throu gh the Weinberg sum rules.\n\nhttp://indico.cern.ch/contributionDisplay.py ?contribId=129&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=129&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Anisotropic flow of φ meson in Pb-Pb collisions at sqrt{s_{NN}} = 2.76 TeV with the ALICE detector DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-414@cern.ch DESCRIPTION:Speakers: ZHOU\, You (Nikhef and Utrecht University (NL))\nThe $\\phi$-meson flow is seen as an important observable to study hydrodynam ic behavior and partonic collectivity of heavy-ion collisions. We present detailed measurements of $\\phi$-meson flow in $\\sqrt{s_{NN}}$=2.76 TeV P b--Pb collisions with the ALICE detector. The results are compared to the flow of other identified particles (kaons\, pions\, antiprotons\, lambdas\ , cascades ) to investigate the mass splitting and the approximate number of quark scaling.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribI d=414&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=414&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Long range forward-backward multiplicity correlations in proton-pr oton collisions at LHC energies with the ALICE detector DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-415@cern.ch DESCRIPTION:Speakers: DE\, Sudipan (Department of Atomic Energy (IN))\nMul tiple parton interactions are expected to produce large long-range multipl icity correlations in high energy proton-proton and nucleus-nucleus collis ions. Color glass condensate models explain the long range forward-backwar d (F-B) correlations by introducing strong color fields extended longitudi nally in rapidity. Clustering of color sources also leads to F-B correlati ons. The measurement of the long range rapidity correlations of the produc ed particle multiplicities may give us insight into the space-time dynamic s of the early stages of the collision.\n\nWe report on short and long-ran ge multiplicity correlations for pp collisions at $\\sqrt{s}$ = 0.9\, 2.76 and 7.0 TeV in the ALICE experiment for minimum bias as well as for high multiplicity events. This measurement utilizes an absolute coordinate syst em and preserves the actual spatial separation of the particles. The F-B c orrelation strengths at 7 TeV for minimum bias events are compared to thos e of 0-10\\% Au+Au collisions at 0.2 TeV from RHIC. Comparison to differen t event generators will be made. Beam energy dependence of the correlation strengths from ISR\, Fermilab to LHC energies will be presented.\n\nhttp: //indico.cern.ch/contributionDisplay.py?contribId=415&sessionId=37&confId= 181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=415&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Elliptic flow of high transverse momentum electrons from heavy-fla vour decays in Pb-Pb collisions at sqrt(s_NN)=2.76 TeV measured by ALICE DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-416@cern.ch DESCRIPTION:Speakers: MOREIRA DE GODOY\, Denise Aparecida (Universidade de Sao Paulo (BR))\nHeavy quarks\, charm and bottom\, are produced in early stages of heavy-ion collisions. Propagating through the created matter the y serve as a probe of the dynamics of the strongly-interacting\, hot and d ense plasma of quarks and gluons (QGP).\nThe transverse momentum dependenc e of the elliptic flow (v2) of heavy quarks is sensitive to the properties of the QGP.\nA non-zero v2 of low transverse momentum electrons from semi -leptonic decays of heavy flavours indicates a collective motion of the he avy quarks with respect to the bulk of the created matter. Whereas\, the h igh transverse momentum v2 is sensitive to the path length dependence of h eavy-quark energy loss within the QGP.\nWe present measurements of heavy-f lavour electron v2 in Pb-Pb collisions at sqrt(s_NN) = 2.76 TeV by the ALI CE experiment at mid-rapidity. In 2011\, the Electromagnetic Calorimeter ( EMCal) provided a dedicated online trigger for measurements of high moment um electrons in Pb-Pb collisions. The electrons were identified in these t riggered events using the Time Projection Chamber (TPC) and the Electromag netic Calorimeter (EMCal). The heavy-flavour electron v2 will be shown as a function of the transverse momentum of the decay electrons.\n\nhttp://in dico.cern.ch/contributionDisplay.py?contribId=416&sessionId=37&confId=1810 55 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=416&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Pseudorapidity dependence of the anisotropic flow with ALICE at th e LHC DTSTART;VALUE=DATE-TIME:20120817T215000Z DTEND;VALUE=DATE-TIME:20120817T221000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-417@cern.ch DESCRIPTION:Speakers: HANSEN\, Alexander (University of Copenhagen (DK))\n The anisotropic flow at forward rapidity provides information on the longi tudinal expansion of the system produced in a heavy-ion collision. We repo rt on the pseudo-rapidity dependence of the charged particle anisotropic f low in Pb-Pb collisions at 2.76 TeV. The measurement is done over a wide r ange of pseudo-rapidity\, |\\eta|\n\nhttp://indico.cern.ch/contributionDis play.py?contribId=417&sessionId=59&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=417&sessionId=5 9&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Background-subtraction procedure for the measurement of the ellipt ic flow of heavy-flavour decay electrons in ALICE DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-410@cern.ch DESCRIPTION:Speakers: RASCANU\, Bogdan Theodor (Johann-Wolfgang-Goethe Uni v.)\nIn ultra-relativistic heavy-ion collisions\, charm and beauty quarks are a sensitive tool to probe the flavour and mass dependence of the parto n interaction with the medium created in such interactions\, the Quark-Glu on Plasma.\nThe level of thermalization of heavy quarks can be studied via the azimuthal anisotropy of their emission in the transverse plane\, the elliptic flow v2\, at low transverse momentum. At high pt\, v2 provides in sight on the path length dependence of parton energy-loss. \nOne channel t o measure the heavy-flavour v2 is semi-electronic decays of hadrons carryi ng a charm or a beauty quark.\nALICE recorded Pb-Pb collisions at 2.76 TeV at the end of 2010 and 2011.\nThe presented poster will focus on the meth od to subtract the background electron contribution in the measurement of the elliptic flow of heavy-flavour decay electrons in Pb-Pb collisions at 2.76 TeV with ALICE at mid-rapidity.\nThe elliptic flow of inclusive elect rons is measured with the event plane method. At high pt the contribution of electrons from heavy-flavour decays is expected to be dominant\, wherea s at low pt most electrons come from Dalitz decays of pi0 and gamma conver sions in the detector material. A Monte Carlo simulation\, based on the me asured elliptic flow and pt distributions of the main background sources\, is performed to estimate the contribution from known background electrons . The knowledge of the ratio of inclusive electrons to the known backgroun d electrons allows to subtract the background cocktail from the inclusive electron v2 and obtain the heavy flavour decay electron v2.\n\nhttp://indi co.cern.ch/contributionDisplay.py?contribId=410&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=410&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Directed flow measurement in Pb-Pb collisions with ALICE at the LH C DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-411@cern.ch DESCRIPTION:Speakers: EYYUBOVA\, Gyulnara (University of Oslo (NO))\nDirec ted flow\, v1\, is measured over a wide range of pseudo-rapidity\, |eta|\n \nhttp://indico.cern.ch/contributionDisplay.py?contribId=411&sessionId=37& confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=411&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Event-by-event mean $p_{\\rm T}$ fluctuations measured by the ALIC E experiment at the LHC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-412@cern.ch DESCRIPTION:Speakers: HECKEL\, Stefan Thomas (Johann-Wolfgang-Goethe Univ. (DE))\nResults on event-by-event fluctuations of the mean transverse mome ntum of charged particles measured by the ALICE experiment at the LHC are compared to different Monte Carlo approaches. For these studies pp collisi ons at $\\sqrt{s}$~=~0.9\, 2.76 and 7~TeV and Pb--Pb collisions at $\\sqrt {s_{\\rm NN}}$~=~2.76~TeV are used. The analysis is performed within $|\\e ta| \n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=412&session Id=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=412&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:D mesons $v_{2}$ measurement with Q-cumulants and Scalar Product m ethods in Pb-Pb collisions at $\\sqrt{s_{NN}}=2.76$ TeV with the ALICE ex periment DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-413@cern.ch DESCRIPTION:Speakers: LUPARELLO\, Grazia (NIKHEF (NL))\nThe ALICE experime nt at the Large Hadron Collider (LHC) has been designed in order to charac terize the quark gluon plasma (QGP) in high-energy heavy-ion collisions. D mesons are powerful probes of the medium since the charm quarks are produ ced at the early stage of the collision and experience its entire evolutio n. In particular\, the anisotropy parameter $v_2$ of D mesons is sensitive to the degree of thermalization of charm quarks within the QGP medium. \n The performance of the Q-cumulants and Scalar Product methods used to meas ure the $v_2$ of D mesons at mid-rapidity in Pb-Pb collisions at $\\sqrt{s _{NN}}=2.76$ TeV will be shown.\nIn particular\, results for $\\rm{D^{0}}$ and $\\rm{D^{*}}$ obtained in the $\\rm{D^{0}} \\rightarrow K \\pi$ and $ \\rm{D^{*}} \\rightarrow \\rm{D^{0}} \\pi$ decay channels will be reported .\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=413&sessionId= 37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=413&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:FoCal - a high granularity electromagnetic calorimeter for forward direct photon measurements as an upgrade of ALICE DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-498@cern.ch DESCRIPTION:Speakers: GUNJI\, Taku (University of Tokyo (JP))\nWe report o n the new design of a forward electromagnetic calorimeter (FoCal) to be pl aced in the pseudorapidity region of $2.5 \n\nhttp://indico.cern.ch/contri butionDisplay.py?contribId=498&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=498&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Transverse momentum correlations in Pb-Pb collisions at sqrt(NN) = 2.76~TeV DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-418@cern.ch DESCRIPTION:Speakers: PRUNEAU\, Claude Andre (Department of Physics and As tronomy)\nWe report on the first study of transverse momentum differential correlation\, $\\la \\Delta p_t \\Delta p_t \\ra$\, in Pb - Pb collision s at \\snn~= 2.76~TeV measured with the ALICE detector at the CERN Large H adron Collider. We measure the two-particle correlation functions for $++$ \, $--$\, and $+-$ charged particle pairs as a function of the pair azimut hal\, $\\Delta\\phi$\, and pseudorapidity\, $\\Delta\\eta$\, differences\, and study their evolution with collision centrality. We find that similar ly to number two-particle correlations\, the $\\la \\Delta p_t \\Delta p_t \\ra$ correlations shape and amplitude exhibit a strong dependence on co llision centrality. We further observe they too exhibit near-side ridge-li ke and double away-side peak structures in most central collisions. We ca rry out Fourier decompositions of the correlation dependence on $\\Delta\\ phi$ as a function of $\\Delta\\eta$ and find the harmonics coefficients a re essentially constant for $\\Delta\\eta>0.6$. We compare the measured ha rmonic coefficients with flow coefficients $v_2$\, $v_3$\, $v_4$ obtained with the reaction plane method and find that\, up to scaling factors that depend on the order of the coefficients\, they have identical collision ce ntrality dependence.\n\nhttp://indico.cern.ch/contributionDisplay.py?contr ibId=418&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=418&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of the production of heavy- flavour decay electrons in pp collisions at sqrt(s) =2.76 TeV with ALICE DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-419@cern.ch DESCRIPTION:Speakers: HICKS\, Bernard Richard (Yale University (US))\nHeav y quarks\, being produced in the initial stages of heavy-ion collisions\, provide an excellent probe for the properties of the quark-gluon plasma (Q GP). The expected in-medium energy loss of quarks is predicted to have a m ass-dependence\; however\, recent results indicate that heavy-quarks lose more energy than expected. The measurement of electrons from heavy flavor decays provides insight into the energy loss of heavy quarks. \nIn this po ster\, we present the measurement of the heavy-flavor electron cross-secti on at central rapidity in sqrt(s) = 2.76 TeV pp collisions in the transver se momentum range 2-12 GeV/c. The measurement in pp collisions provides th e necessary baseline for comparison to heavy ion collisions and provides a test of perturbative QCD calculations of heavy quark production. The resu lt is compared to FONLL perturbative QCD predictions.\n\nhttp://indico.cer n.ch/contributionDisplay.py?contribId=419&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=419&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:A novel high momentum particle identification detector for the nex t generation ALICE experiment DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-499@cern.ch DESCRIPTION:Speakers: HARTON\, Austin Vincent (Chicago State University (U S))\nA high momentum particle identification detector is under discussion by the ALICE experiment at CERN as part of its plan for high luminosity da ta taking in the next decade. The VHMPID detector is improving on well est ablished ring imaging Cerenkov technology by using a pressurized gas volum e in a focussing geometry to minimize the radial depth of the device. In t his configuration the VHMPID can be paired with existing calorimeter modul es in order to enable track by track PID measurements in fully reconstruct ed jets. The detector is expected to achieve unambiguous K\, pi\n\nhttp:// indico.cern.ch/contributionDisplay.py?contribId=499&sessionId=37&confId=18 1055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=499&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Charm contribution to final hadron yield at LHC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-319@cern.ch DESCRIPTION:Speakers: PETRAN\, Michal (Czech Technical University (CZ))\nA lmost all charm in heavy ion collisions is produced in the hard 'first int eraction' processes before partons thermalize into a drop of QGP. Charm s urvives the QGP evolution and as hadrons emerge in soft hadronization pro cesses\, practically every charm or anticharm quark turns into a charmed h adron\, small fraction of the charm yield enters multi-charmed hadrons and charmonium states. We assume that in the hadronization process the single charmed hadrons production is governed by the available phase space and t heir yield is normalized by the total single charm hadron yield. By allowi ng for charm hadron to charm hadron decay cascades\, we establish total fr action of single charm hadrons found in their ground states. We show that the yields of charmed mesons can help to determine the charm hadronizati on temperature. We further cascade single charmed hadrons into non-charme d hadrons and show that at LHC these cascade products add significant fra ction to certain strange hadron yields.We discuss particularly interesting examples such as phi (bar s s) and Xi(ssq). This shows that one cannot s tudy charm and hadron production at LHC omitting the charm conversion into soft hadrons.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=3 19&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=319&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Photon-Hadron Azimuthal Correlation Measurement in 200GeV d+Au Col lisions at RHIC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-318@cern.ch DESCRIPTION:Speakers: XIA\, Bing (O)\nDeuteron-gold collisions are essenti al to measure the cold nuclear matter effects\, as well as help to interpr et the heavy ion collision results to study the quark gluon plasma. Direct photons are less affected by the nuclear medium\, thus\, they can be used to infer the momentum of the scattered partons. Also\, because of the pre valence of the Compton scattering in the direct photon events\, the away-s ide jets are predominantly produced by quark jets. We analyze the azimutha l correlation between high pT direct photons and hadrons and look for the modification of the away-side jet portion of this correlation. The current status of this gamma-jet correlation analysis in d+Au collisions is prese nted in this poster. This includes analysis of the $x_{E}$ distribution wh ich is related to the fragmentation function D(z). We will also present th e status of a new analysis in d+Au of the asymmetry between positive and n egative charged hadrons in the away-side quark jets due to the cross-secti on dominance of up vs down quarks\, which can be compared to Au+Au.\n\nhtt p://indico.cern.ch/contributionDisplay.py?contribId=318&sessionId=37&confI d=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=318&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:J/$\\psi$ production in $\\sqrt{s_{NN}}$ = 39 GeV and 62.4 GeV Au +Au collisions from STAR DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-313@cern.ch DESCRIPTION:Speakers: ZHA\, Wangmei (U)\nThe Relativistic Heavy Ion Collid er (RHIC) is built to search for the Quark-gluon Plasma (QGP) and to study its properties in laboratory through high energy heavy-ion collisions. J/ $\\psi$ suppression in heavy-ion collisions due to color screening of quar k and anti-quark has been proposed as a signature of QGP formation. But ot her mechanisms are likely to contribute to the observed J/$\\psi$ in heavy -ion collisions such as the cold nuclear matter effect\, charm quark recom bination\, sequential suppression\, and hot wind dissociation. Measurement s of J/$\\psi$ invariant yields at different collision energies and centra lities can shed new light on understanding the interplay of these mechanis ms for J/$\\psi$ production and medium properties.\nIn this presentation w e will report the measurements of J/$\\psi$ invariant yields as a function of transverse momentum (with $p_{T}$ coverage: 0-5 GeV/c at mid-rapidity) in Au+Au collisions at $\\sqrt{s_{NN}}$ = 39 GeV and 62.4 GeV taken in 20 10 from STAR with full Time-of-Flight detector and Barrel ElectroMagnetic Calorimeter detector in operation. Centrality dependence of J/$\\psi$ prod uction and nuclear modification factors will be presented. Comparisons amo ng different collision energies and model calculations will be discussed.\ n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=313&sessionId=37 &confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=313&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Direct Photon - Hadron Pair Correlations Measurement in Au+Au Coll ision at PHENIX DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-312@cern.ch DESCRIPTION:Speakers: RIVELI\, Nowo (O)\nThe direct photon - hadron pair c orrelations serve as an excellent probe of the hot and dense medium create d in the heavy ion collision at RHIC. The unmodified photon is used as a r eference for the modification of the jet energy by the medium. The low cro ss section of QCD Compton scattering that produces direct photon - quark p airs added with the enormous production of the background photons requires large amount of Au+Au events to allow a measurement with convincing stati stical certainty. In 2010 (Run 10) PHENIX has collected 8.2 billion events of Au+Au collision with 200 GeV of center-of-mass energy per nucleon\, a factor of 1.5 times larger than the same collision system collected in 200 7 (Run 7). Improvement can also be achieved by event-by-event based method s that would reject large number of the background photons and thus increa se the signal-to-background ratio. We will present a feasibility status of the event-by-event isolation cut application in Au+Au collisions and give a status report on the measurement of direct photon - hadron pair correla tions.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=312&sessi onId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=312&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Two Particle Correlation Results from the PHENIX Silicon Vertex De tector (VTX) in Au+Au collisions at 200 GeV DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-311@cern.ch DESCRIPTION:Speakers: THEO\, Theodore Koblesky (University of Colorado)\nT wo particle correlations in azimuth and pseudorapidity encapsulate a wealt h of information from jet correlations from medium response to bulk collec tive flow. The PHENIX Silicon Vertex Detector (VTX) is a cylindrical\, 4-l ayer detector close to the beampipe which extends the PHENIX tracking capa bility to a pseudorapidity from -1 to +1 and over nearly the full azimuth. The first heavy ion data set with the VTX was taken in 2011 and we will p resent the latest status on these correlation analysis using this VTX data from 200 GeV Au+Au collisions. Additionally\, many frameworks have been p roposed for factorizing the above listed physics contributions that will b e compared to the experimental data.\n\nhttp://indico.cern.ch/contribution Display.py?contribId=311&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=311&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Instantons and Sphalerons in a Magnetic Field DTSTART;VALUE=DATE-TIME:20120817T213000Z DTEND;VALUE=DATE-TIME:20120817T215000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-310@cern.ch DESCRIPTION:Speakers: BASAR\, Gokce (Stony Brook University)\nI study the properties of the Euclidean Dirac equation for a light fermion in the pres ence of both a constant abelian magnetic field and an SU(2) instanton. In particular\, I analyze the zero modes analytically in various limits\, bot h on R^4 and on the four-torus\, in order to compare with recent lattice Q CD results\, and study the implications for the electric dipole moment of the instanton induced by the magnetic field. I also present a holographic computation of the sphaleron rate of a strongly coupled plasma in a the pr esence of a constant magnetic flux and discuss its various physical implic ations.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=310&sess ionId=38&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=310&sessionId=3 8&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Prompt Photon Production and Photon-Jet Hadron Correlations in PH ENIX at RHIC DTSTART;VALUE=DATE-TIME:20120814T185500Z DTEND;VALUE=DATE-TIME:20120814T191500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-317@cern.ch DESCRIPTION:Speakers: FRANTZ\, Justin Edward (Ohio University (US))\nA var iety of heavy-ion data from RHIC and recently also from the LHC on hard d irect photon production testifies that this "white" probe of the densely colored QGP continues to lend new insights to understanding jet suppressi on and energy loss. It also allows first comparisons between RHIC and LH C energies for the behavior of energy loss\, for example whether jet frag mentation function is indeed modified by the energy loss process at any je t energy. Additionally\, direct photon measurements in A+A since they are not affected by the final state QGP\, offer an excellent way to test for non-trivial initial state effects\, complementing recent PHENIX d+Au collision jet and single electron spectra data. To this end\, we will re port in this talk on new results of high pT single direct photon producti on in both p+p and Heavy Ion systems. \nFor the hot final state QGP studie s\, PHENIX results on direct photon-jet "photon-hadron" \ncorrelations for QGP studies will also be presented. This will include a report on analys es of new datasets\, which should be able to directly address the question of fragmentation function modification\, along with the status of new ana lysis directions in PHENIX for this channel\, such as event by event photo n identification techniques in high multiplicity.\n\nhttp://indico.cern.ch /contributionDisplay.py?contribId=317&sessionId=3&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=317&sessionId=3 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Forward J/psi production in Au+Au and Cu+Au collisions at PHENIX DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-316@cern.ch DESCRIPTION:Speakers: Dr. IORDANOVA\, Aneta (University of California\, Ri verside)\nOne important theoretical model of heavy ion collisions expects that the collision zone can be divided into two distinct regions: the core and the corona. The corona region is a low density p+p or p+A like regio n which may be a more favorable for J/psi production as opposed to the hot \, dense core. From a Glauber model\, this region is found to be symmetri c about the reaction plane in Au+Au collisions\, but is distinctly asymmet ric in Cu+Au collisions. In this poster\, we will describe the expected g eometrical asymmetry in terms of the Glauber model implementation and show our initial studies of forward J/psi production toward measuring the rela tive size of the corona as a function of system-size.\n\nhttp://indico.cer n.ch/contributionDisplay.py?contribId=316&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=316&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Exploring cold nuclear matter effects in d+Au with high-pT reconst ructed jets at PHENIX DTSTART;VALUE=DATE-TIME:20120818T133000Z DTEND;VALUE=DATE-TIME:20120818T134000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-315@cern.ch DESCRIPTION:Speakers: PEREPELITSA\, Dennis (Columbia University)\nProton-n ucleus (p+A) collisions can be used to investigate cold nuclear matter eff ects on hard-scattered partons and serve as an important baseline for heav y-ion collisions. In particular\, p+A collisions at different centrality s elections can probe the impact parameter dependence of nuclear parton dist ribution functions\, initial state energy loss and final state parton inte ractions in the cold nucleus. Jet reconstruction can better determine the initial parton kinematics and recent improvements in analysis techniques a llow the exploration of these effects over a wide pT range. We present the latest jet reconstruction measurements performed with the PHENIX detector at RHIC in deuteron-gold (d+Au) collisions at 200 GeV using the Gaussian filter and anti-kT algorithms and discuss the possible implications on des criptions of cold nuclear matter.\n\nhttp://indico.cern.ch/contributionDis play.py?contribId=315&sessionId=29&confId=181055 LOCATION:Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=315&sessionId=2 9&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:A GEM-based continuous readout scheme for the ALICE TPC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-496@cern.ch DESCRIPTION:Speakers: GUNJI\, Taku (University of Tokyo (JP))\nThe Time Pr ojection Chamber (TPC) is the central tracking device of the ALICE experim ent\, providing momentum measurement and particle identification via the s pecific energy loss dE/dx. The readout rate of the TPC is presently limite d by the necessity to prevent ions from the amplification region of the MW PC-based readout chambers to drift back into the drift volume\, which is a chieved through active ion gating by operating a dedicated Gating Grid. Th e relevant ion drift times limit the maximum trigger rate of the TPC to ab out 3.5 kHz. For future running at the LHC beyond 2019\, where collision r ates of 50 kHz in Pb-Pb are expected\, these limitations can be overcome b y replacing the present MWPC-based readout chambers by a GEM readout\, whi ch provides intrinsic ion capture capability without additional gating. In this contribution the perspectives of a GEM TPC for ALICE with continuous readout are discussed and the expected performance and status of R & D wi ll be presented.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId =496&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=496&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Toward radiative transport with improved parton interactions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-138@cern.ch DESCRIPTION:Speakers: ZHANG\, Bin (Arkansas State University)\nThe Quark-G luon Plasma can be produced in high energy heavy ion collisions and how it equilibrates is important for the extraction of the properties of strongl y interacting matter. A radiative transport model can be used to reveal in teresting characteristics of Quark-Gluon Plasma thermalization. For exampl e\, screened parton interactions always lead to partial pressure isotropiz ation. Systems with different initial pressure anisotropies evolve toward the same asymptotic evolution. In particular\, radiative processes are cru cial for the chemical equilibration of the system. Matrix elements under t he soft and collinear approximation for these processes as first derived b y Gunion and Bertsch are widely used. A different approach is to start wit h the exact matrix element for the 23 processes as was first conjectured b y Parke and Taylor. General features of this approach will be reviewed and the results will be compared with the Gunion-Bertsch results. We will com ment on the possible implications of the exam matrix approach on Quark-Glu on Plasma thermalization.\n\nhttp://indico.cern.ch/contributionDisplay.py? contribId=138&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=138&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Novel coherence effects in initial state medium induced gluon radi ation DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-3@cern.ch DESCRIPTION:Speakers: MARTINEZ GUERRERO\, Mauricio (Universidade de Santia go de Compostela)\nRadiative interferences in the multiparton shower is th e building block of QCD jet physics in vacuum. The presence of a QCD mediu m is expected to alter this interference pattern. We investigate color coh erence effects in the medium modification to the initial state radiation i n a simple setup which allows to include these effects in a clean way. We derive the medium induced gluon spectrum of an ``asymptotic" parton which suffers a hard scattering and subsequently crosses a QCD medium. The angul ar distribution of the induced gluon spectrum gets modified when one inclu des interference terms between the incoming and the outcoming parton at fi nite angle. In the soft limit\, we provide a simple and intuitive probabil istic picture which could be of interest for Monte Carlo implementations. We comment on the possible phenomenological consequences of this new mecha nism of soft gluon radiation in nuclear collisions.\n\nhttp://indico.cern. ch/contributionDisplay.py?contribId=3&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=3&sessionId=37& confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Two- and Multi-particle cumulant measurements of vn and isolation of flow and nonflow in 200 GeV Au+Au Collisions by STAR DTSTART;VALUE=DATE-TIME:20120815T133000Z DTEND;VALUE=DATE-TIME:20120815T135000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-368@cern.ch DESCRIPTION:Speakers: YI\, Li (Purdue University)\nAzimuthal anisotropic f lows vn\, arising from the anisotropic collision geometry\, reflect the hy drodynamic properties of the quark gluon plasma created in relativistic he avy-ion collisions. A long standing issue in vn measurements is the contam ination of nonflow\, caused by intrinsic particle correlations unrelated t o the collision geometry. Nonflow limits\, in part\, the precise extractio n of the viscosity to entropy density ratio eta/s from data-model comparis ons. Isolation of flow and nonflow is critical to the interpretation of th e Fourier decomposition of dihadron correlations.\n\nIn this talk we repor t measurements of vn azimuthal anisotropies using the two- and mult-partic le Q-cumulants method from STAR in Au+Au collisions at 200 GeV. The centra lity and pT dependence of vn will be presented. We compare the four- and s ix-particle cumulant measurements to gain insights on the nature of flow f luctuations [1\,2]. We further analyze two- and four-particle cumulants be tween pseudo-rapidity (eta) bins. Exploiting the collision symmetry about mid-rapidity\, we isolate the \\Delta\\eta-dependent and \\Delta\\eta-inde pendent correlations in the data with a data-driven method [3]. The \\Delt a\\eta-dependent part arises from near-side nonflow correlations\, such as HBT interferometry\, resonance decays\, and jet-correlations. The \\Delta \\eta-independent part is dominated by flow and flow fluctuations with rel atively small contribution from away-side jet-correlations. The method doe s not make assumptions about the eta dependence of flow. Our isolated \\De lta\\eta-independent part from data\, dominated by flow\, however\, is fou nd to be also eta-independent within the STAR TPC of +-1 unit of pseudo-ra pidity. The \\Delta\\eta drop in the measured two-particle cumulant appear s to entirely come from nonflow. We assess the effect of the nonflow on et a/s extraction. We reexamine the high-pT triggered dihadron correlations w ith background subtraction of our decomposed flows. \n\n[1] S.A. Voloshin\ , A.M. Poskanzer\, A. Tang\, and G. Wang\, Phys. Lett. B659\, 537 (2008).\ n\n[2] L. Yi\, F. Wang\, and A. Tang\, arXiv:1101.4646 [nucl-ex].\n\n[3] L . Xu\, L. Yi\, D. Kikola\, J. Konzer\, F. Wang\, and W. Xie\, arXiv:1204.2 815 [nucl-ex].\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=3 68&sessionId=7&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=368&sessionId=7 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The PHENIX Forward Silicon Vertex Detector DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-369@cern.ch DESCRIPTION:Speakers: DURHAM\, J. Matthew (Los Alamos National Laboratory) \nTwo Forward Silicon Vertex Trackers (FVTX) have been installed at the PH ENIX Experiment at RHIC\, and extend the precision vertex capability of th e PHENIX Silicon Vertex Trackers (VTX) to forward rapidity. The FVTX cons ists of two endcaps\, with four silicon mini-strip planes each\, covering the angles from ~10 to 35 degrees (1.2\n\nhttp://indico.cern.ch/contributi onDisplay.py?contribId=369&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=369&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Higher harmonics flow measurement of charged hadrons and electrons in wide kinematic range with PHENIX VTX tracker DTSTART;VALUE=DATE-TIME:20120815T131000Z DTEND;VALUE=DATE-TIME:20120815T133000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-366@cern.ch DESCRIPTION:Speakers: Dr. KUROSAWA\, maki (RBRC)\nCollective flow is one o f the key measurements to study the hot and\ndense matter created in heavy ion collisions\, because it relates closely to early evolution of the mat ter. In particular\, higher harmonic flow measurements plays an important role in constraining theoretical model calculations describing properties of the matter.\n\n The silicon vertex tracker (VTX) was installed into the PHENIX experiment in 2010 and it successfully collected approximately 5 b illion events of Au+Au collisions at 200 GeV in 2011 RHIC run. The VTX is a four-layer silicon tracker and it can reconstruct charged particle track s in a wide range of pseudo-rapidity (|eta|\n\nhttp://indico.cern.ch/contr ibutionDisplay.py?contribId=366&sessionId=7&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=366&sessionId=7 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The Effect of 3<->2 Rates on Thermalization in Covariant Transport DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-367@cern.ch DESCRIPTION:Speakers: Mr. HEMPHILL\, Dustin (Purdue University)\nWe employ a grid based stochastic technique to solve the on-shell \nBoltzmann trans port equation including inelastic 32 processes. The case of an interactin g massless partonic gas in a longitudinally expanding Bjorken geometry is considered. The numerical accuracy of the algorithm is first rigorously e stablished from comparisons to both static box calculations and earlier re sults from the MPC cascade with 22 interactions. We then study the effect of inelastic 32 collision rates and particle production on thermalization \, chemical equilibration\, and entropy production in the partonic system. \n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=367&sessionId=3 7&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=367&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Realistic medium-averaging in GLV radiative energy loss DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-364@cern.ch DESCRIPTION:Speakers: Mr. SUN\, Deke (Purdue University)\nThere has been a lot of interest in testing radiative energy loss \ncalculations against d ata from RHIC and the LHC. It is customary\, as in the Gyulassy-Levai-Vite v (GLV) approach\, to formulate the energy loss of a jet parton as a line integral from the production point along a straight-line trajectory. Calcu lations then account for variations in path length with jet origin and dir ection\, and most recently also for fluctuations in the medium density (lu mpiness)\, which give rise to fluctuations in energy loss that significant ly affect high-pT observables such as the nuclear suppression R_AA or the momentum anisotropies v_n.\n\nThese studies\, however\, ignore that the li ne integrals themselves \nrepresent an average over the location of possib le interaction points \n(color sources in GLV) along the jet path. We will present results from a calculation with stochastically chosen interaction points for each jet\, which gives additional fluctuations in energy loss. The influence of these fluctuations on RHIC and LHC observables will be d iscussed utilizing both medium density parameterizations and realistic med ium evolution from bulk dynamics models\, such as the parton transport MPC . A special advantage of using parton transport is that it conveniently pr ovides the evolution of an ensemble of scattering centers.\n\nhttp://indic o.cern.ch/contributionDisplay.py?contribId=364&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=364&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Perturbations on Top of the Fireball DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-365@cern.ch DESCRIPTION:Speakers: STAIG\, Pilar (Stony Brook University)\nWe study the effect that perturbations and their propagation through the medium have i n the final particle distributions of heavy ion collisions. Our work is co nstrained to central collisions only\, where the medium can be described b y the solution to conformally invariant hydrodynamics developed by Gubser and Yarom\, which is a generalization of Bjorken flow where the boost-inva riant medium expands both in the longitudinal and the radial directions. W hen perturbations are added to the background the linearized hydrodynamic equations can be solved and the solutions for different modes can be summe d up to form an initial point-like perturbation\, that can be evolved unti l freeze-out. We use a similar procedure to study jets traversing the medi um. Cases with different viscosities and different initial positions are considered and the Cooper-Frye prescription is used \nto calculate the fi nal particle distributions.\n\nhttp://indico.cern.ch/contributionDisplay.p y?contribId=365&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=365&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Heavy quark quenching from RHIC to LHC and the consequences of glu on damping DTSTART;VALUE=DATE-TIME:20120817T215000Z DTEND;VALUE=DATE-TIME:20120817T221000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-362@cern.ch DESCRIPTION:Speakers: GOSSIAUX\, Pol (Subatech)\nRecently\, we have propos ed a microscopic approach for the quenching and thermalisation of heavy qu arks (HQ) in URHIC \\cite{Gossiaux:2008\,Gossiaux:2009\,Gossiaux:2010}\, a ssuming that \nthey interact with light partons through both elastic and r adiative processes evaluated by resorting to some parameterization of the running coupling constant\, while those partons are spatially distributed along hydrodynamical evolution of the hot medium. This approach is able to explain successfully several observables measured at RHIC\, such as the n uclear modification factor and the elliptic flow of non-photonic single el ectrons. The diffusion coefficient of heavy quarks in the quark gluon plas ma -- a fundamental property of this state of matter -- can thus be extrac ted and compared with recent lattice calculations. In this contribution\, we discuss the predictions of our model for D and B mesons production in U RHIC at LHC energies and confront them with experimental results obtained so far by ALICE and CMS collaborations for Pb-Pb collisions at $\\sqrt{s}= 2.76~{\\rm TeV}$. \n\nThe slight excess of quenching found w.r.t. the D me sons data at LHC trigers our interest in new effects neglected up to now\, such as the influence of gluon damping on radiative energy loss and its p henomenological consequences. In \\cite{Bluhm:2011}\, we have indeed studi ed the effect of an absorptive medium on standard LPM \\cite{LPM} radiatio n in electrodynamics and have advocated that the large time needed for the photon formation in Bremsstrahlung from ultrarelativistic charges is not affordable if damping is taken into account. Similar effect manifests itse lf in QCD\, as we have recently advocated in \\cite{Bluhm_2012}. In our QM contribution\, we intend to concentrate on the {\\em implications} of suc h an effect on the quenching of particles in URHIC (discussing observables such as spectra\, elliptic flow and azimutal correlations) as well as on the single electron puzzle. \n\n\\begin{thebibliography}{9}\n\n\\bibitem{ Gossiaux:2008}\nP.B. Gossiaux\, J. Aichelin\, Phys. Rev. C{\\bf 78}\, 0149 04 (2008)\, [hep-ph/0802.2525].\n\n\\bibitem{Gossiaux:2009}\nP.B. Gossiaux \, R. Bierkandt\, J. Aichelin\, Physical Review C{\\bf 79} (2009) 044906\n \n\\bibitem{Gossiaux:2010}\nP.B. Gossiaux\, V. Guiho\, J. Aichelin\, J. Ph ys. G: Nucl. Part. Phys. {\\bf 37} (2010) 094019\n\n\\bibitem{Gossiaux:201 1}\nP.B. Gossiaux et al.\, arXiv:1102.1114\n\n\\bibitem{Bluhm:2011}\nM. Bl uhm\, P.B. Gossiaux\, and J. Aichelin\, arXiv:1106.2856\, PRL {\\bf 107} ( 2011) 265004 \n\n\\bibitem{LPM}\nL.D. Landau and I. Ya. Pomeranchuk\, Dokl . Akad. Nauk SSSR {\\bf 92} (1953) 535\; ibid. {\\bf 92} (1953) 735.\n\n\ \bibitem{Bluhm_2012}\nM. Bluhm\, P. B. Gossiaux\, T. Gousset\, J. Aichelin \,[arXiv:1204.2469v1] \n\n\\end{thebibliography}\n\nhttp://indico.cern.ch/ contributionDisplay.py?contribId=362&sessionId=38&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=362&sessionId=3 8&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Open charm hadron production in p+p and Au+Au collisions at STAR DTSTART;VALUE=DATE-TIME:20120817T182000Z DTEND;VALUE=DATE-TIME:20120817T184000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-360@cern.ch DESCRIPTION:Speakers: Mr. TLUSTY\, David (PhD student)\nIn relativistic he avy ion collisions at RHIC\, heavy quarks are expected to be created from initial hard scatterings. Their large masses are not easily affected by th e strong interaction with QCD medium\, thus they carry clean information f rom the system at early stage. The interaction between heavy quarks and th e medium is sensitive to the medium dynamics\, therefore heavy quarks are suggested as an ideal probe to quantify the properties of the strongly int eracting QCD matter.\nIn this talk\, we will present the STAR results of o pen charm hadron production at mid-rapidity in $p+p$ and Au+Au collisions at $\\sqrt{s_{NN}}$ = 200 GeV. Open charm mesons were reconstructed direct ly via hadronic decay channels with daughter particles identified by TPC a nd TOF detectors. With abundant statistics of Au+Au collisions collected by STAR in the year 2010 and 2011\, the D-meson is measured at $p_T$ from 0.2 to 8 GeV in minimum bias Au+Au collisions. The centrality dependence o f D-meson $p_T$ spectra as well as the nuclear modification factor will be presented. A first measurement of the $D^{0}$ elliptic flow in 200 GeV Au +Au collisions will be reported. These measurements are compared to theore tical model calculations and physics implications will be discussed. Final ly\, we will discuss the open charm hadron measurement in $\\sqrt{s}=500$ GeV $p+p$ collisions to study the energy dependence of charm production.\n \nhttp://indico.cern.ch/contributionDisplay.py?contribId=360&sessionId=23& confId=181055 LOCATION: Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=360&sessionId=2 3&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Why the formula $\\mean{dN_{ch}^{AA}/d\\eta}=\\mean{dN_{ch}^{pp}/d \\eta} [x N_{part}/2 +(1-x) N_{coll}]$ should be deprecated DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-361@cern.ch DESCRIPTION:Speakers: TANNENBAUM\, Michael (Brookhaven National Laboratory (US))\n\\bc \n{\\large \\bf{ Why the formula\\\\ $\\mean{dN_{\\rm ch}^{AA }/d\\eta}=\\mean{dN_{\\rm ch}^{pp}/d\\eta} [x N_{\\rm part}/2 +(1-x) N_{\\ rm coll}]$\\\\ should be deprecated}}\n\n\\bs\nAbstract for Quark Matter 2 012 poster\n\\bs\n\\underline{Michael J. Tannenbaum}~$^{a)}$\n$^{a)}$ Phys ics Department\, Brookhaven National Laboratory\, \nUpton\, NY 11973-5000\ , USA\n\nThe fact that the multiplicity density in A+A collisions increase s faster than the number of participants has led to the popular formula $\ \mean{dN_{\\rm ch}^{AA}/d\\eta}=\\mean{dN_{\\rm ch}^{pp}/d\\eta} [x N_{\\r m part}/2 +(1-x) N_{\\rm coll}]$ with the implication that point-like hard -scattering contributes to the total charge multiplicity or $\\sum E_T$ di stributions. For $\\sqrt{s}=630$ GeV $\\bar{p}-p$ collisions\, the UA2 col laboration~\\cite{UA2PLB165} measured that the hard-scattering component o f $\\sum E_T$ distributions only becomes apparent at the level of $\\sim 1 /500$ the total cross-section\, clearly indicating that the contribution o f hard-process to the multiplicity and $\\sum E_T$ distributions is neglig ible. The universal behavior of $\\mean{dN_{\\rm ch}^{AA}/(0.5N_{\\rm part }d\\eta)}$ as a function of $N_{\\rm part}$ at RHIC and LHC over the range $7\\leq \\sqrt{s_{NN}}\\leq 2760$ GeV\, in spite of the dramatic increase in the ratio of $N_{\\rm coll}/N_{\\rm part}$ due to the increasing N-N i nteraction cross section\, is another indication. Finally\, an $E_T$ distr ibution which satisfies the popular formula for $\\mean{dN_{\\rm ch}^{AA}/ d\\eta}$ will be demonstrated and shown to look nothing like any measured $\\sum E_T$ distribution. A more reasonable nuclear geometrical descriptio n has been given previously~\\cite{Voloshin\,De\,Nouicer} and will be test ed with recent data. \n\n\\begin{thebibliography}{9}\n\\bibitem{UA2PLB165 } UA2 Collab.\, \\Journal{\\PLB}{165}{441-448}{1985}.\n\\bibitem{Voloshin} S.~Eremin and S.~Voloshin\, \\Journal{\\PRC}{67}{064905}{2003}.\n\\bibite m{De} B.~De and S.~Bhattacharyya\, \\Journal{\\PRC}{71}{024903}{2005}.\n\\ bibitem{Nouicer} R. Nouicer\, \\Journal{\\EPJC}{49}{281}{2007}.\n\\end{the bibliography}\n\\end{document}\n\nhttp://indico.cern.ch/contributionDispla y.py?contribId=361&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=361&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Photon and Dilepton Emission from the Hadronization Process in Hea vy Ion Collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-380@cern.ch DESCRIPTION:Speakers: Mr. CHEN\, Guangyao (Cyclotron Insitute and Departme nt of Physics&Astronomy\, Texas A&M University)\nA new source of photon an d dilepton emission from nuclear matter undergoing phase transition from p artonic to hadronic degrees of freedom is studied. Electromagnetic radiati on can be emitted when quark antiquark pairs recombine into pions and othe r hadrons. The photon and dilepton production rates are found to be compar able to those in quark gluon plasma and hadronic matter around the critica l temperature. We compute the photon and dilepton yields from such process es for Au+Au collision at RHIC(\\sqrt{s}=200GeV) by convoluting the rates with a hydrodynamic simulation of the system. A comparison of the results to PHENIX and STAR measurements shows that dileptons from hadronization pr ocesses could partially explain the excess of low mass dilepton. The trans verse momentum spectrum exhibits a smaller effective temperature than the QGP contribution. The elliptic flow of dileptons from the hadronization pr ocess behaves similar to the elliptic flow of dileptons from hadronic matt er. Photon yields from these processes are not found to be important comp ared to QGP emission.\n\nhttp://indico.cern.ch/contributionDisplay.py?cont ribId=380&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=380&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Thermal photons and dileptons - successes\, status\, urgency DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-381@cern.ch DESCRIPTION:Speakers: Dr. DAVID\, Gabor (Brookhaven National Laboratory)\n While experimentally very demanding\, thermal (low pT) photons and dilepto ns offer unique\, direct access to the medium formed in heavy ion collisio ns\, its size\, temperature\, lifetime\, viscosity and other properties. Higher pT jet-medium photons can serve as a control (complementary) probe. On the other hand these measurements are very involved and the interpret ation of the results is challenging. We'll present a brief survey of past successes and current status\, then assess the future need and realistic possibilities of thermal photon and dilepton measurements in heavy ion col lisions.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=381&ses sionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=381&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Photon Reconstruction in the sPHENIX Electromagnetic Calorimeter DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-382@cern.ch DESCRIPTION:Speakers: Dr. PURSCHKE\, Martin (BROOKHAVEN NATIONAL LABORATOR Y\, for the PHENIX Collaboration)\nThe initial stage of the sPHENIX upgrad e detector at RHIC will focus on the measurement of jet observables\, such as gamma-jet properties\, withhigh statistics over a large kinematic rang e. We have studied several key performance parameters of the envisioned el ectromagnetic calorimeter. In this poster we will present the studies of t he photon identification in the presence of the particle densities found i n Heavy-Ion collisions.\n\nhttp://indico.cern.ch/contributionDisplay.py?co ntribId=382&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=382&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Transverse Momentum Broadening in Weakly Coupled Quark-Gluon Plasm a DTSTART;VALUE=DATE-TIME:20120816T182000Z DTEND;VALUE=DATE-TIME:20120816T184000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-384@cern.ch DESCRIPTION:Speakers: LEKAVECKAS\, Mindaugas (MIT)\nWe calculate P(k_perp) \, the probability distribution for an energetic parton propagating for a distance L through a medium to pick up transverse momentum k_perp\, for a medium consisting of weakly coupled quark-gluon plasma. We use full or HTL self-energies in appropriate regimes\, resumming each in order to find th e leading large-L behavior. We estimate the jet quenching parameter and c ompare to results in the literature. And\, we compare P(k_perp) at weak co upling to the P(k_perp) expected from holographic calculations that presum e the quark-gluon plasma to be strongly coupled at all length scales. We find that the weak coupling and strong coupling results need not differ gr eatly at modest k_perp\, but we find that P(k_perp) must be parametrically larger in a weakly coupled plasma than in a strongly coupled plasma at la rge enough k_perp. By looking for rare large-angle deflections of the jet resulting from a parton produced initially back-to-back with a hard photo n\, experimentalists can find the weakly coupled quark and gluon short-dis tance constituents of the strongly coupled liquid quark-gluon plasma\, muc h as Rutherford found the nuclei within atoms or Friedman\, Kendall and Ta ylor found the quark within nucleons.\n\nhttp://indico.cern.ch/contributio nDisplay.py?contribId=384&sessionId=16&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=384&sessionId=1 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Results from Fixed-Target Collisions from STAR: Au+Al at $\\root{S _{NN}}$ = 4.5\, 3.5 and 3.0 GeV DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-385@cern.ch DESCRIPTION:Speakers: HAAG\, Brooke (U)\nThe RHIC Beam Energy Scan (BES) w as proposed to search for the\npossible critical point and to study the na ture of the phase transition between hadronic and partonic matter.\nHoweve r\, several dynamical model simulations (UrQMD\, PHSD\,\nQGSM\, GiBUU\, 3- fluid) suggest that the partonic phase is entered for\ncenter-of-mass coll ision energies as low as 4-5 GeV [1]. Collisions\nbetween beam halo nuclei and the aluminum beam pipe allow STAR to study fixed-target Au+Al collisi ons. The injection and sub-injection energy gold beams (kinetic energies o f 8.8\, 4.8 and 2.9 AGeV) produce Au+Al collisions at center-of-mass energ ies of 4.5\, 3.5\, and 3.0 GeV. Particle ratios will be presented and comp ared to earlier published results from the AGS\, SPS\,and RHIC. Fixed tar get acceptances and efficiencies for tracking in the TPC and particle iden tification in the Time of Flight system will be discussed.\n\nReferences:\ n[1] I.C. Arsene et al.\, Phys. Rev. C75\, 034902 (2007).\n\nhttp://indico .cern.ch/contributionDisplay.py?contribId=385&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=385&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Charge Asymmetry Dependency of $\\pi^+/\\pi^-$ Azimuthal Anisotrop y in Au + Au Collisions at STAR DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-387@cern.ch DESCRIPTION:Speakers: KE\, Hongwei (Central China Normal University)\nA re cent theoretical study indicates that a chiral magnetic wave at finite bar yon density could induce an electric quadrupole moment in the quark-gluon plasma produced in heavy ion collisions. The quadrupole deformation will l ead to a difference in azimuthal anisotropy $v_2$\, between positive and n egative pions\, and the magnitude of this difference is predicted to be pr oportional to net charge asymmetry. The net charge asymmetry is defined as $(N_+ - N_-)/(N_+ + N_-)$\, while $N_+ (N_-)$ is the number of positive ( negative) particles. STAR experiment has observed the different $v_2$ of p articles and anti-particles at $\\sqrt{s_{NN}}$ = 7.7\, 11.5\, 19.6\, 27\, 39 and 62.4 GeV. Study on the charge asymmetry dependency of $\\pi^+/\\pi ^-$ azimuthal anisotropy will shed light on the possible sources of the $v _2$ difference of particles and anti-particles.\n\nWe present STAR's measu rement of azimuthal anisotropy difference between positive and negative pi ons at low transverse momentum for Au + Au collisions at $\\sqrt{s_{NN}}$ = 7.7\, 11.5\, 19.6\, 27\, 39\, 62.4 and 200 GeV. The azimuthal anisotropy difference between $\\pi^+$ and $\\pi^-$ will be shown as a function of n et charge asymmetry and centrality. In addition\, these results will be co mpared with model calculations.\n\nhttp://indico.cern.ch/contributionDispl ay.py?contribId=387&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=387&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Dissipative Hydrodynamic Evolution of the QGP at Finite Baryon Den sity DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-388@cern.ch DESCRIPTION:Speakers: MONNAI\, Akihiko (The University of Tokyo)\nThe firs t results of the heavy ion program at LHC [1] suggest that the near-perfec t fluidity discovered at RHIC is a universal property of the quark-gluon p lasma (QGP) above and around the crossover temperature. The recent develop ments in hydrodynamic studies take account of the effects of shear and bul k viscosities as well as fluctuations for the quantitative understanding o f the hot medium. On the other hand\, net baryon number is neglected in mo st of the modern hydrodynamic analyses even though it is fully conserved a t forward rapidity. Since the net baryon carries valuable information on t he remnant of the colliding nuclei and thus on the magnitude of kinetic en ergy loss for the QGP production in the yet-unknown early thermalization s tage\, the next task for hydrodynamic analyses should be to incorporate fi nite baryon density.\n\nIn this study\, I develop a novel dissipative hydr odynamic model with finite net baryon density to investigate the net baryo n rapidity distributions at RHIC and LHC [2]. Baryon dissipation is taken into account together with shear and bulk viscosities by a generalized sec ond order theory [3]. The state-of-art lattice QCD equation of state and t he color glass type initial conditions are employed. The results show that the net baryon is carried to forward rapidity during the hydrodynamic evo lution\, which implies that the experimentally observed transparency of th e collision at RHIC [4] is effectively enhanced. This indicates that the k inetic energy loss for the production of the hot medium at the initial sta ge is larger\, and then a part of the energy is transferred back to the ne t baryon components through the strong medium interaction. Furthermore\, t he net baryon distribution is found sensitive to baryon diffusion as well as to viscosities. This opens a possibility of constraining all the transp ort coefficients experimentally\, including the ones at finite density suc h as baryon diffusion coefficient and thermo-diffusion cross coefficient. The results indicate that the dissipative hydrodynamic modeling would be i mportant for extracting unique properties of the hot medium even in the hi gh-energy collisions.\n\nReferences:\n[1] K. Aamodt et al. [ALICE Collabor ation]\, Phys. Rev. Lett. 105\, 252302 (2010).\n[2] A. Monnai\, arXiv:subm it/0457509 (temporary identifier\, to appear on 23 Apr 2012).\n[3] A. Monn ai and T. Hirano\, Nucl. Phys A 847\, 283 (2010).\n[4] I. G. Bearden et al . [BRAHMS Collaboration]\, Phys. Rev. Lett. 93\, 102301 (2004).\n\nhttp:// indico.cern.ch/contributionDisplay.py?contribId=388&sessionId=37&confId=18 1055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=388&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:High-pT neutral pion nuclear modification in PHENIX detector DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-389@cern.ch DESCRIPTION:Speakers: NOVITZKY\, Norbert (Helsinki Institute of Physics (F I))\nNeutral-pion spectra were measured at midrapidity ($|y|\n\nhttp://ind ico.cern.ch/contributionDisplay.py?contribId=389&sessionId=37&confId=18105 5 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=389&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Thermal photons from quark matter in presence of strong magnetic f ield. DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-578@cern.ch DESCRIPTION:Speakers: Dr. CHATTERJEE\, Bhaswar (Physical Research Laborato ry\, Ahmedabad\, India)\nWe calculate explicitly the thermal quark propaga tor in presence of magnetic field that is relevant for heavy ion collision experiments at RHIC and LHC. Using this propagator\, we calculate the mom entum dependent polarization tensor and discuss the relevant collective ex citations. Using the same\, we also evaluate the thermal photon rate of qu ark matter in presence of magnetic field. We estimate the photon flux for ultra strong magnetic field that will be of relevance for RHIC and LHC.\n\ nhttp://indico.cern.ch/contributionDisplay.py?contribId=578&sessionId=37&c onfId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=578&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Hadronic Resonance States in an Effective Chiral Model DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-604@cern.ch DESCRIPTION:Speakers: Mr. RAU\, Philip (Goethe University Frankfurt\, Germ any)\nWith an effective hadronic chiral flavor SU(3) model we investigate properties of QCD matter for a wide range of temperatures and baryochemica l potentials. With our model\, including all hadronic resonances up to mas ses of 2.6 GeV\, we show that the strengths of the resonance couplings to the attractive scalar and the repulsive vector fields have a major impact on the order and location of the chiral phase transition. Reasonable vecto r couplings\, found by comparing model data to recent lattice QCD results\ , limit the phase transition to a smooth cross over and therefore rule out the possible existence of a critical end point.\n\nFurthermore\, we study fluctuations of conserved charges at the phase\ntransition and present re lated (strange) quark number fluctuations and their associated susceptibil ity coefficients both at zero baryochemical potential and when crossing th e phase transition at different regions in the T-mu plane. We show that su sceptibility ratios get significantly suppressed at non-vanishing baryoche mical potentials.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribI d=604&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=604&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:on QGP signals in high energy pp collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-576@cern.ch DESCRIPTION:Speakers: LIU\, Fuming (Central China Normal University)\nWe w ill address the possibility of QGP formation in pp at 7TeV and 14 Tev wit h given life scan and size of QGP \nbased on quantitative model estimation and constrained with all available data at LHC from the four collaboratio ns. \nThen discuss the possible QGP signals in pp collisions\, which certa inly differ to the QGP signals in AA collisions.\n\nTo theoreticians: Most of you think QGP formation is possible at high energy pp collisions. But why not do some quantitative calculations\nand give helpful references to the experimental exploration. \nTo experimentalists: The employment of h ydrodynamics in pp looks so unreliable. But don't forget at the beginning \nof hydro employment in AA some years ago\, it looked the same unreliable . Nowadays the widely employment of hydro \nhave helped us learn so much a bout the nature of the matter created in high energy heavy ion collisions. \nIt is a fact that the diference between a high-multiplicity 7TeV pp sys tem and a 200AGeV AuAu system is much much smaller \nthan the difference b etween a 200AGeV AuAu system and a Moore of any kind of matter. So be ope n to take hydro employment in pp\n---it may be useful references for you!\ n\nThe impact of QGP formation in pp is unknown\, and waiting for our expl oration.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=576&ses sionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=576&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Charge balancing and the fall off of the ridge DTSTART;VALUE=DATE-TIME:20120814T220500Z DTEND;VALUE=DATE-TIME:20120814T222500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-575@cern.ch DESCRIPTION:Speakers: BOZEK\, Piotr ()\nThe puzzle of the fall-off of the same-side ridge in relative pseudorapidity\, found in unbiased two-particl e correlations\, is solved. We show that the event-by-event hydrodynamics followed by statistical hadronization with proper charge conservation prov ides the crucial non-flow component and leads to agreement with the data a t soft transverse momenta (p_T \n\nhttp://indico.cern.ch/contributionDispl ay.py?contribId=575&sessionId=49&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=575&sessionId=4 9&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Jet Quenching and Holographic Thermalization DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-61@cern.ch DESCRIPTION:Speakers: YANG\, Di-Lun (D)\nThe AdS/CFT correspondence has be en widely used to study the jet quenching of hard probes traveling in the strongly-coupled plasma. Nevertheless\, in most of studies\, the hard prob es were assumed to be created at the late time within the thermalized medi um. To understand the thermalization of the medium and its influence on hi gh-energy probes generated in the early time in the strongly-coupled scena rio would entail further investigations. In the gravity dual\, the thermal ization of the medium corresponds to the gravitational collapse and the fo rmation of a black hole. We utilize the AdS-Vaidya metric\, which describe s a falling mass shell\, to analyze the isotropic thermalization. In WKB a pproximation\, the dissipation of a high-energy jet traversing the medium can be characterized by the stopping distance of a massless particle falli ng along the null geodesic in the gravity dual. We find the stopping dista nce of an energetic probe in AdS-Vaidya spacetime is equal to that in AdS- Schwarzschild spacetime\, which implies that a probe with the energy much greater than the thermalization temperature is not be sensitive to the the rmalization process\, at least in this idealized scenario. This is differe nt from a gluon probe with finite energy represented by a falling string i n the gravity dual\, where the stopping distance is governed by the null g eodesic starting below the boundary. We find that the stopping distance is increased in the presence of the thermalization process.\n\nhttp://indico .cern.ch/contributionDisplay.py?contribId=61&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=61&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Jet Physics Simulations for the sPHENIX Upgrade DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-258@cern.ch DESCRIPTION:Speakers: Dr. HANKS\, J. Ali (PHENIX)\nThe first stage of the sPHENIX upgrade focuses on the measurement of jet observables at RHIC ener gies. The enhanced acceptance and high rate capabilities of this upgrade a llow for the measurement of a large set of jet observables\, including dij et and gamma-jet properties\, across a large kinematic range. The sensitiv ity of the proposed upgrade to the medium modification of such observables and the ability to test and constrain theoretical models will be presente d.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=258&sessionId =37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=258&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Conventional effects in higher cumulant ratios of conserved charge s in relativistic heavy ion collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-63@cern.ch DESCRIPTION:Speakers: Prof. WU\, Yuanfang (Institute of Particle Physics\, CCNU\, wuhan China)\nHigher cumulant ratios of conserved charges are sugg ested to be sensitive probe of QCD critical end point [1] in relativistic heavy ion collisions. Their behaviors at current relativistic heavy ion co llisions are highly interested and studied intensively [2\,3]. Before we d raw the critical-like fluctuations from the measured higher cumulants\, it is necessary to know what the contributions of conventional effects are. \n In the present work\, we firstly derive the Poisson-like statistica l fluctuations of net-proton number [4]\, and net-electric charge. It show s that net-proton kurtosis at top incident energy of RHIC [3] is dominated by Poisson-liked statistical fluctuations [4]. So dynamical higher moment s\, subtracting the statistical parts\, are suggested. \n Secondly\, t he influences of the centrality\, the efficiency of the detector\, and the cuts of transverse momentum (pT) and rapidity in higher cumulant ratios o f net-proton are systematically studied by using the sample of Au + Au col lisions at 39GeV generated by APMT default model. It is found: (1) Both dy namical and directly measured cumulant ratios are sensitive to the definit ions of centrality. (2) Dynamical cumulant ratios are little efficiency de pendent. (3) Both dynamical and directly measured cumulant ratios are the cuts of phase-space dependent. \n\nReferences:\n[1] Volker Koch\, arXiv:08 10.2520.\nM.A. Stephanov\, Phys. Rev. Lett. 102\, 032301 (2009)\;\nMasayuk i Asakawa et al.\, PRL 103\, 262301 (2009)\;\n M.A. Stephanov\,Phys. Rev . Lett 107\, 052301(2011)\;\n[2] A.M. Halasz\, A.D. Jackson\, R.E. Shrock\ , M.A. Stephanov and J.J.M. Verbaarschot\, \n Phys. Rev. D 58\, 096007(1 998)\; S.Gupta et al.\, Science 332\, 6037(2011).\n[3] M.M.Aggarwal et al. \, (STAR Coll.)\, Phys.Rev.Lett. 105\, 022302(2010). Talks at the Workshop \n On Fluctuations\, Correlations and RHIC Low Energy Runs\, http://www .bnl.gov/fcrworkshop/\, \n and the 7th International Workshop on
Criti cal Point and Onset of Deconfinement\, \n http://conf.ccnu.edu.cn/~cpod2 011/.\n[4] Lizhu Chen et al.\, J.Phys.G:Nucl.Part.Phys. 38\, 115004(2011). \n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=63&sessionId=37 &confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=63&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:A direct measure of anisotropic velocity in relativistic heavy ion collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-64@cern.ch DESCRIPTION:Speakers: Prof. WU\, Yuanfang (Institute of Particle Physics\, CCNU\, Wuhan China)\nThe radial flow parameters are important quantities in relativistic heavy ion collisions [1]. They constrain the equation of s tate [2] and in particular\, the anisotropic parameter relates to shear vi scosity [3]. They are usually extracted from the spectrum of transverse mo mentum by the parameterizations of Blast-wave model [4]. \n In the pres ent work\, we suggest a direct measure of radial velocity\, i.e.\, microsc opic average velocity of freeze-out particles in azimuthal plane. It conta ins three parts: average radial expansion velocity\, average anisotropic v elocity (the amplitude of modulation in radial expansion velocity as funct ion of the relative angle to the reaction plane)\, and average thermal vel ocity. \n Using the sample of Au+ Au collisions at 200 GeV produced by AMPT with string melting model\, we demonstrate that this microscopic ave rage velocity is well fitted by two parts: an average isotropic velocity\, and an average anisotropic velocity\, which is azimuthal angle dependent. This form of radial velocity is the same as theoretically expected radial flow parameterization [5]. But the difference is that the average isotrop ic velocity contains the contributions of thermal motion. From the particl e species dependence of the average isotropic velocity\, we demonstrate th at the heavier the mass of the particles\, the smaller the isotropic veloc ity is. It is just the character of thermal motion. \n Fortunately\, average thermal velocity is isotropic and therefore has no contribution to ward the average anisotropic velocity. In order to confirm this\, the cent rality dependence of average radial velocity is presented. We find that it s anisotropic part is close to zero when the collisions approach to the ce ntral ones. It shows indeed no anisotropic velocity in an ideal central co llision. \n Moreover\, we carefully extract kinetic freeze-out param eters in the same sample by fitting pt spectrum and elliptic flow using th e parameterization of blast-wave model [4\,6]. It is found that the averag e anisotropic velocity is well coincident with the anisotropic flow veloci ty extracted by blast-wave model. Furthermore\, the centrality dependence of average anisotropic velocity is also consistent with that of extracted from the Blast-wave model. So microscopic average anisotropic velocity of final state particles is a good approximation of anisotropic flow velocity . \n\n[1] P. Huovinen\, P.F. Kolb\, U. Heinz\, P.V. Ruuskanen \, S.A . Voloshin\, Phys.Lett. B 503 (2001) \n 58–64\; Jajati K. Nayak and Jan-e Alam\, Phys. Rev. C 80\, 064906 (2009)；R. Arnaldi et \n al. ( NA60 Collaboration)\, Phys. Rev. Lett. 100\, 022302(2008)\; Sergei A. Volo shin\, Arthur \n M. Poskanzer\, and Raimond Snellings，arXiv: 0809.29 49.\n[2] P. Huovinen and P. V. Ruuskanen\, Ann. Rev. Nucl. Part. Sci.\,200 6\, \n 56 :163；D. A. Teaney\, arXiv: 0905.2433\; Huichao Song\, arXi v:0908.3656v1\n[3] L.D.Landau\, E.M. Lifschitz\, Fluid Mechanics\, Institu te of Physical \n Problems\, U.S.S.R. Academy of Sciences\,Volume 6\, Course of \n Theoretical Physics\; Chun Shen\, Ulrich W Heinz\, Phys. Rev.C83:044909\,2011\; \n Wang Meijuan\, Li Lin \, Liu Lianshou and Wu Yuanfang\, J. Phys.G: Nucl.Part.Phys: 36\, \n 064070(2009).\n[4] E. S chnedermann\, J. Sollfrank\, and U. W. Heinz\, Phys. Rev. C.1993\,48\, \n 2462-2475\; W.Broniowski and W.Florkowski. Phys.Rev.Lett.87\, \n 272302(2001). F. Retiere and M.A. Lisa\, Phys. Rev. C 70 044907 \n (2 004)\; \n[5] Arthur M. Poskanzer\, J.Phys. G30 (2004) S1225-S1228\; J. Ada ms\, et al.\, (STAR \n Collaboration)\, Phys.Rev.C72:014904\, 2005\; Y . Oh\, Z. W. Lin\, C. Y. Ko\, Phys. Rev. C \, \n 2009\, 80: 064902.\n [6] Ming Shao\, Li Yi\, Zebo Tang\, Hongfang Chen et al.\, J. Phys. G37: \ n 085104\,2010\; Zebo Tang et al.\,arXiv: 1101.1912.\n\nhttp://indico. cern.ch/contributionDisplay.py?contribId=64&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=64&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Critical fluctuations of the higher moments of order parameter and energy from 3D-Ising\, O(2) and O(4) models DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-65@cern.ch DESCRIPTION:Speakers: Prof. WU\, Yuanfang (Institute of Particle Physics\, CCNU\, Wuhan\, China)\nHigher moments of net-baryon are suggested to be s ensitive probe of QCD critical end point [1] in relativistic heavy ion col lisions. Their critical fluctuations are highly interesting and instructiv e for the exploration of QCD phase diagram from both theoretical and exper imental sides. \n According to the universality of critical behavior\, the QCD critical end point\, and the chiral phase transition in two-flavo r QCD are argued to be the same universality class of 3 dimensional Ising model [2]\, and O(2)\, or O(4) model[3]\, respectively. The generic struct ures of net-baryon fluctuations at QCD critical end point and chiral phase transition in the chiral limit with vanishing baryon chemical potential c an be discussed by the order-parameter fluctuations in Ising model and the energy fluctuations in O(2)\, or O(4) model [4\,5]. So in the present wor k\, the higher moments of order parameter and energy from 3D-Ising\, O(2) and O(4) models near the critical temperature at finite size are systemati cally studied\, and compared with those obtained from effective models\, a nd Lattice QCD calculations. \n It is found that the generic structu res of order-parameter fluctuations in 3D-Ising\, O(2) and O(4) models are similar. So do energy fluctuations. On the other hand\, the singular stru ctures of order parameter fluctuations appear at lower moments\, e.g.\, th e oscillation structures of 4th moment of order parameter\, which may refl ect the generic structure of 4th order moment of baryon number in the vici nity of critical end point\, are similar to the 3rd moments of energy\, wh ich corresponding to the 6th moment of net-baryon number at chiral phase t ransition in the chiral limit with vanishing baryon chemical potential. Th is means that even higher moments\, such as 6th moments of net-baryon numb er\, are necessary in probing the chiral phase transition temperature\, th e same as what suggested in ref. [5].\n The generic singular structure s of order-parameter fluctuations in 3D-Ising and energy fluctuations in O (2)\, or O(4) models are qualitatively consistent with corresponding estim ations of Nambu-Jona-Lasinio [6]\, Linear Sigma model [7]\, Polyakov-Nambu -Jona-Lasinio [8]\, Polyakov Quark Meson models [9]\, and current lattice QCD calculations [10]. \n\n[1] M.A. Stephanov\, Phys. Rev. Lett 102\, 0323 01 (2009)\n[2] R.D. Pisarski and F. Wilczek\, Phys. Rev. D 29\, 338(1984)\ ; F. Wilczek\, Int. J. Mod. Phys. A 7\, 3911(1992)\, A.M. Halasz\, A.D. Ja ckson\, R.E. Shrock\, M.A. Stephanov and J.J.M. Verbaarschot\, Phys. Rev. D 58\, 096007(1998)\;\n[3] R.D. Pisarski and F. Wilczek\, Phys. Rev. D 29 \, 338(1984)\;F. Wilczek\, Int. J. Mod. Phys. A 7\, 3911(1992)\; K.Rajagop al and F. Wilczek\, Nucl. Phys. B 399\, 395(1993)\n[4] J. J. Rchr and N. D . Mcrmin\, Phys. Rev. A 8\, 472(1973)\; Nigel B Wilding\, J. Phys.: Conden s. Matter 9\, 585(1997)\; Chiho Nonaka and Masayuki Asakawa\, Phys. Rev. C 71\, 044904 (2005)\n[5] B. Friman\, F. Karsch\, K. Redlich and V. Skokov\ , arXiv:1103.3511(2011)\n[6] Masayuki Asakawa\, Shinji Ejiri\, and Masakiy o Kitazawa\, Rev. Lett 103\, 262301(2009)\n[7] M.A. Stephanov\, Phys. Rev. Lett 107\, 052301(2011)\n[8] Wei-jie Fu\, Yu-xin Liu and Yue-Liang Wu\, p hys. Rev. D 81\, 014028 (2010)\n[9] V. Skokov et al.\, Phys. Rev. D 82\, 0 34029 (2010)\n[10] M. Cheng et al.\, Phys. Rev. D 79\, 074505 (2009)\n\nht tp://indico.cern.ch/contributionDisplay.py?contribId=65&sessionId=37&confI d=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=65&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Shear viscosity of the quark-gluon plasma from flow in heavy-ion c ollisions DTSTART;VALUE=DATE-TIME:20120814T210500Z DTEND;VALUE=DATE-TIME:20120814T212500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-66@cern.ch DESCRIPTION:Speakers: LUZUM\, Matthew (IPhT Saclay)\nWe report an extracti on of the ratio of shear viscosity to entropy density (eta/s) of the mediu m created in relativistic heavy-ion collisions at the LHC. With a signific ant improvement of one of the main sources of theoretical uncertainty\, we are able for the first time to quote a precise average value with robust error bars\, systematically accounting for all known sources of systematic error (theoretical and experimental).\n\nhttp://indico.cern.ch/contributi onDisplay.py?contribId=66&sessionId=47&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=66&sessionId=47 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurements of the Correlation between Jets and the Reaction Plan e in STAR at RHIC DTSTART;VALUE=DATE-TIME:20120815T154000Z DTEND;VALUE=DATE-TIME:20120815T160000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-252@cern.ch DESCRIPTION:Speakers: OHLSON\, Alice (Yale University)\nThe relationship b etween jet properties and the underlying geometry of the medium produced i n heavy ion collisions can be explored through a measurement of the correl ation between the axes of reconstructed jets and the reaction plane (defin ed as jet $v_2$). Such a measurement provides information on the pathleng th dependence of medium-induced parton energy loss as well as biases in je t-finding methods. In addition\, an estimate of jet $v_2$ is necessary fo r background-subtraction in jet-triggered correlation analyses\, which are used to study medium-induced jet shape modification. However\, jet $v_2$ measurements are complicated by biases in the event plane calculation due to the presence of the jet\, leading to an overestimation of jet $v_2$. In order to reduce the artificial jet-event plane bias\, we utilize detect ors at forward pseudorapidity ($\\eta$)\, such as the Forward Time Project ion Chambers located at $2.5 6.3$\, to determine the event plane when mea suring $v_2$ of reconstructed jets at mid-rapidity ($|\\eta| \n\nhttp://in dico.cern.ch/contributionDisplay.py?contribId=252&sessionId=52&confId=1810 55 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=252&sessionId=5 2&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Chiral phase transition in a dynamical linear sigma model. DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-253@cern.ch DESCRIPTION:Speakers: WESP\, Christian (Goethe Universität Frankfurt)\nOn e of today's main goals in high energy physics is the exploration of the p hase diagram of nuclear matter.\nOn the theoretical side\, much effort has been put into the investigation of quantum chromodynamics (QCD)\, its pha se diagramm and symmetries.\n\nAn important property of the QCD Lagrangian is its approximate chiral symmetry in the light-quark sector. At low temp eratures and density this approximate symmetry is also spontaneously broke n\, while at higher temperatures and/or densities a chiral-symmetry restor ing phase transition is expected. Collider experiments at LHC (CERN) probe the phase diagramm at high energy densities and low chemical and baryon c hemical potentials\, where the chiral phase transition is expected to be a cross over. Future experiments at FAIR (GSI) probe the region with high c hemical potential\, where a lower-order phase transition is expected.\n\nW e use a dynamical 3+1D linear sigma model with constituent quarks to exami ne the evolution of equilibrium and non-equilibrium scenarios. In a first attempt we employ a mean-field ansatz which reproduces the thermodynamica l properties of the linear sigma model. To investigate fluctuating observa bles like the quark- and baryon-density at and near the phase transition\, the model is extended with scattering processes between the quark quasi-p articles and the chiral fields. For further improvments\, we plan to inclu de an effective Polyakov-loop to model effects of the confienment.\n\nhttp ://indico.cern.ch/contributionDisplay.py?contribId=253&sessionId=37&confId =181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=253&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Hadronic effects on the X(3872) meson abundance in heavy ion colli sions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-251@cern.ch DESCRIPTION:Speakers: CHO\, Sungtae ()\nWe study the absorption of hadroni c molecules such as the X(3872) by pions and rho mesons during the hadroni c stage of heavy ion collisions. We also investigate the possibilities of formation of hadronic molecules during different evolution stages of the h adronic phase. We show that the absorption cross section and its thermal a verage are strongly dependent on the structure and quantum number of X(387 2). We thus suggest that studying the abundances of a set of exotic hadron s provide a chance to infer their structures as well as their production m echanisms in relativistic heavy ion collisions.\n\nhttp://indico.cern.ch/c ontributionDisplay.py?contribId=251&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=251&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Exploring Gluonic Matter with Electron-Ion Collisions DTSTART;VALUE=DATE-TIME:20120817T205000Z DTEND;VALUE=DATE-TIME:20120817T211000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-256@cern.ch DESCRIPTION:Speakers: LEE\, J.H. (Brookhaven National Laboratory)\nHeavy n uclei probed in deep inelastic scattering and diffraction with leptonic pr obes \nin the high-energy (small-x) regime open a new precision window int o answering \nfundamental questions in QCD. \nThe proposed electron-ion co llider at BNL (eRHIC) will be a new high-energy \nand high-luminosity elec tron-ion/proton machine. The design offers \nunprecedented access to stud y the nature of QCD matter and strong color fields. \nIn particular\, the new collider will allow us to explore the properties of\ngluon saturation\ , which is one of the fundamental outstanding problems in QCD.\nThe compel ling physics case for the electron-Ion collider is presented with \na focu s on studying saturated gluonic matter in the context of the initial\ncond ition of the high-energy heavy-ion collisions at RHIC and LHC.\nIn this ta lk\, we will discuss how selected key measurements - dihadron correlation \nand exclusive diffractive vector meson production can be used to probe\n and characterize the gluonic matter produced at small-x in eA collisions.\ n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=256&sessionId=58 &confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=256&sessionId=5 8&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Productions of heavy flavor quarks in p+p collisions in PHENIX DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-254@cern.ch DESCRIPTION:Speakers: Dr. CHEN\, Chin-Hao (PHENIX Collaboration)\nHeavy fl avor quarks such as charm and bottom\, provide important probes of the par ton energy loss mechanism in quark-gluon plasma. By studying the single el ectrons coming from the single leptonic decays of D and B mesons\, we can study the energy loss of charm and bottom.\n\nIn order to study the heavy flavor energy loss process\, a baseline comparison in p+p collisions where there is no quark-gluon plasma presented is crucial. The Silicon Vertex D etector (VTX) is the latest upgrade installed in PHENIX in 2011\, which gr eatly enhances the ability of the heavy flavor measurement\, and will be a ble to distinguish the production of single electrons produced from charm and bottom decays. The status of the analysis of heavy flavor electrons pr oduced in p+p collisions from 2012 dataset will be presented.\n\nhttp://in dico.cern.ch/contributionDisplay.py?contribId=254&sessionId=37&confId=1810 55 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=254&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Event-by-Event Fluctuations in Initial Conditions in Relativistic Hydrodynamic Model DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-255@cern.ch DESCRIPTION:Speakers: MURASE\, Koichi (The University of Tokyo)\nTo invest igate the physics of the strongly interacting system of quarks\nand gluons under extreme conditions\, heavy-ion collision experiments are\nperformed at Large Hadron Collider (LHC) and Relativistic Heavy Ion\nCollider (RHIC ). One of the major discoveries is that elliptic flow v_2\nwas comparable with an ideal hydrodynamic prediction and\, as a result\,\nthat a new para digm of strongly coupled quark-gluon plasma (QGP) at\ntemperature of a few hundreds MeV was established. Recently\, the higher\nharmonics v_n (n > 2 ) are observed at RHIC and LHC and attract a lot of\ntheoretical and exper imental interests. Initial condition with\nfluctuation from initial nucleo n distribution in colliding nuclei is\nattributed to one of the major orig ins of the higher harmonics.\n\nTo understand detailed mechanism of how th e higher harmonics develop\, we\nconstruct an integrated dynamical framewo rk based on relativistic\nhydrodynamics [1] and perform massive numerical simulations (10^5\nminimum bias events) on an event-by-event basis [2]. In this framework\,\nthe Monte-Carlo versions of factorized Kharzeev-Levin-N ardi (fKLN) model\n(MC-KLN) and Glauber model (MC-Glauber) are employed as the\ninitialization models. After describing hydrodynamic evolution of th e\nmatter using fully (3+1) dimensional ideal hydrodynamics\, we treat the \nsubsequent dynamics of hadron gas using a hadron cascade model\, JAM.\nU sing the obtained momentum distribution of the final hadrons\, we\nfinally analyze the harmonics v_n in a way that experimental people\nperform the flow analysis such as event plane method\, multi-particle\ncumulant method . We compare these results with the conventional\ntheoretically-obtained h armonics with respect to reaction plane or\nparticipant plane to investiga te the systematic uncertainty in the\nconventional theoretical results. We found that v_n obtained in this way\ndepends on the flow analysis model\, which means the importance of\nconsistent comparison between theoretical results with experimental\ndata. We also calculate v_n as a function of ce ntrality using the MC-KLN\nand MC-Glauber initialization and found differe nces of v_2\, v_4 and v_5\nbetween these two models. This indicates the si multaneous analysis of\nseveral harmonics would discriminate between the i nitialization models.\n\n[1] T. Hirano and Y. Nara\, ``Dynamical modeling of high energy heavy ion\ncollisions\,'' arXiv:1203.4418 [nucl-th].\n[2] T . Hirano\, P. Huovinen\, K. Murase and Y. Nara\, in preparation.\n\nhttp:/ /indico.cern.ch/contributionDisplay.py?contribId=255&sessionId=37&confId=1 81055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=255&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Di-electron Measurements in $p+p$ collisions by PHENIX using the H adron Blind Detector DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-602@cern.ch DESCRIPTION:Speakers: SHARMA\, Deepali (S)\nDi-electrons are among the mos t promising probes for studying the\nearly\, hot and dense stages created in relativistic heavy-ion\ncollisions. They are color neutral and so inte ract only\nelectromagnetically\, thus carrying to the detectors informatio n about\nthe conditions and properties of the medium at the time of their\ ncreation. The di-electrons are emitted over the the entire space-time\nev olution of the collision and their spectrum thus carries a wealth of\ninfo rmation.\n\nPHENIX has measured a large\, unexpected enhancement in $Au+Au $ collisions\nin the low mass region ( 0.2 - 0.8 GeV/c$^2$ )\, with respec t to the baseline\ncocktail scaled from $p+p$ collisions. However\, this result suffers from\na large systematic uncertainty due to the huge combin atorial\nbackground of uncorrelated pairs from partially reconstructed $\\ pi^0$\nDalitz decays and $\\gamma$ conversions.\n\nTo combat this challeng e\, PHENIX installed a hadron blind detector\n( HBD ) for the 2009 and 201 0 RHIC runs. Its purpose is to tag and\nreject the combinatorial backgrou nd coming from these decays. A\nreliable analysis of the 2010 $Au+Au$ dat a hinges on a complete\nunderstanding of the HBD and its unique characteri stics. The 2009\n$p+p$ run serves as a crucial testing ground for understa nding the\nsystematics associated with this novel detector. The\nproof-of- principle obtained in the $p+p$ HBD analysis will be\npresented in this po ster.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=602&sessio nId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=602&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Relation Between the Trace Anomaly and Shear Viscosity in Cluster ing of Color Sources and the Equation of State of the QGP DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-508@cern.ch DESCRIPTION:Speakers: Prof. SCHARENBERG\, Rolf (Purdue University)\nThe ma jor challenge in heavy ion physics is to extract the equation of state and the shear viscosity to entropy ratio $\\eta/s$ from the data. In the clus tering of color sources (CSPM) the charged particle transverse momentum sp ectrum is used to measure the percolation density parameter $\\xi$\, which determines the initial temperature T\, energy density $\\epsilon$\, and t he $\\eta/s$ ratio versus T in Au+Au collisions at $\\sqrt{s_{NN}}$ = 200 GeV . \nFor 0.9 $T_{c} $ 1.2$T_{c}$ there is a significant difference wi th the LQCD values\\cite{eos}. \n\nThe measured CSPM value for $\\eta/s$ = 0.20\, at 1.15$T_{c}$ is consistent with a strongly coupled QGP and inc reases with T. The Trace Anomaly $\\triangle $ is defined as $(\\epsilon-3 p)/T^{4}$.\nAbove $T_{c}$\, the LQCD $\\triangle $ and the reciprocal of $ \\eta/s$ fall off with 1/T. At $T_{c}$ \, $s/\\eta$ has a magnitude of $\ \sim$5.5 \, non interacting - CSPM has a $\\triangle\\sim$ 5.5 and LQCD $\\triangle \\sim $5.5. The change in $\\triangle$ and $s/\\eta$ with 1/T describes the transition from a strongly to weakly coupled QGP. Above $T_{c}$\, $s/\\eta$ and the LQCD $\\triangle$ may have the same underlyin g structure. The $C_{s}^{2}$ values for the QGP obtained using the $s/\\ eta \\sim 5.5$ version of CSPM above $T_{c}$ are in excellent agreement with LQCD \\cite{wupp\, hotqcd}.\nThe CSPM predictions for Pb-Pb and p-p c ollisions at LHC energies will be presented.\n\nhttp://indico.cern.ch/cont ributionDisplay.py?contribId=508&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=508&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Luminosity determination in pp and Pb-Pb collisions at the LHC wit h the ALICE detector DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-509@cern.ch DESCRIPTION:Speakers: LEOGRANDE\, Emilia (Universita e INFN (IT))\nLuminos ity is an essential ingredient for the measurement of the cross section of physical processes. Luminosity determination in ALICE at the LHC is based on the visible cross sections measured in dedicated calibration experimen ts (van der Meer scans).\nBesides serving as reference for the determinati on of integrated luminosities\, the cross sections measured in van der Mee r scans can\, with suitable extrapolation\, provide direct access to physi cal quantities such as the inelastic interaction cross section. \nVan der Meer scans have been performed at the LHC in pp collisions at sqrt(s) = 2. 76\, 7 and 8 TeV and in Pb-Pb collisions at sqrt(s_NN) = 2.76 TeV. A detai led description of the ALICE setup and analysis will be given\; the measur ement uncertainties will be discussed and compared to the requirements of the ALICE physics program.\n\nhttp://indico.cern.ch/contributionDisplay.py ?contribId=509&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=509&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Study of single-muon and J/Ψ production in pp collisions at √s = 2.76 TeV as a function of multiplicity with ALICE DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-506@cern.ch DESCRIPTION:Speakers: SARKAR - SINHA\, Tinku (Saha Institute of Nuclear Ph ysics (IN))\nThe high energy density reached in pp collisions at LHC could be comparable with the energy density for heavy–ion collisions at lower energies (i.e. Au-Au collisions at RHIC) and it might lead to the observ ation of collective phenomena. The multiplicity of the collision can be us ed as the “centrality” variable in pp collisions at LHC. \nIn particul ar\, the LHC provided p-p collisions at √s = 2.76 TeV\, the same energy per nucleon-nucleon collisions studied in Pb-Pb. These data were already u sed as a reference to measure the nuclear modification factor (RAA) of J/ Ψ production in Pb-Pb collisions.\nOne can search for possible collective effects in pp collisions by studying the multiplicity dependence of vario us observables commonly studied as probes of the Quark Gluon Plasma in hea vy-ion collisions. In particular\, this study will present results on the production of single-muon and J/Ψ at forward rapidity as a function of th e charged particle density measured at mid-rapidity in pp collisions at 2. 76 TeV with the ALICE detector.\n\nhttp://indico.cern.ch/contributionDispl ay.py?contribId=506&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=506&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Prospects of Low-Mass Dielectron Measurement in ALICE with an upgr aded ITS DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-504@cern.ch DESCRIPTION:Speakers: REICHELT\, Patrick Simon (Johann-Wolfgang-Goethe Uni v. (DE))\nThe measurement of electron-positron pairs in the low invariant mass region allows to study the vacuum and in-medium properties of light v ector mesons. Dielectrons also probe the production of thermal photons in heavy-ion collisions.\nALICE is well-suited to perform this measurement du e to its excellent tracking and particle identification capabilities at ve ry low momenta. However\, Dalitz decays and photon conversions lead to a h igh combinatorial background. Additionally\, coincident semi-leptonic deca ys of charm and anti-charm hadrons produce a continuum signal\, which domi nates over a thermal dielectron signal.\nBoth contributions can be reduced by an improved Inner Tracking System\, to be installed during LHC's long shutdown (2018). It will further improve the tracking efficiency at low p_ t and provide excellent detection capabilities for electrons from secondar y vertices like conversions and heavy-quark decays. The expected impact of a new ITS on the low-mass dielectron measurement in pp and Pb-Pb collisio ns will be presented.\nTo further increase the acceptance for low p_t trac ks\, a reduction of the magnetic field in the ALICE central barrel from 0. 5 T to 0.2 T is considered. Its influence on the low-mass dielectron measu rement will be discussed.\n\nhttp://indico.cern.ch/contributionDisplay.py? contribId=504&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=504&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:J/psi measurements at ALICE using EMCal-triggered events DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-505@cern.ch DESCRIPTION:Speakers: ARAUJO SILVA FIGUEREDO\, Marcel (Universidade de Sao Paulo (BR))\nJ/psi measurements can be performed with ALICE through the d ilepton decay into electrons (for rapidity |y|\n\nhttp://indico.cern.ch/co ntributionDisplay.py?contribId=505&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=505&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Cross section\, polarization and multiplicity dependence of J/psi production in pp collisions at the LHC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-502@cern.ch DESCRIPTION:Speakers: FIONDA\, Fiorella (Universita e INFN (IT))\nThe meas urement of J/psi production in proton-proton collisions at the LHC energy regime allows to test QCD calculations. In addition\, it provides the nece ssary reference for the ALICE Pb-Pb program. ALICE collected proton-proton collisions at sqrt{s} = 7 and 2.76 TeV in 2010 and 2011.\nIn this talk\, we present the latest results on J/psi production in proton-proton collisi ons\, measured by ALICE at both mid and forward rapidity via its leptonic decay channels. These results include the differential production cross se ction\, the first LHC result on J/psi polarization\, the charged particle multiplicity dependence of J/psi production and a measurement of non-promp t J/psi resulting from B-hadron decays at central rapidity down to very lo w p_t.\nComparisons with different theoretical models will be discussed.\n \nhttp://indico.cern.ch/contributionDisplay.py?contribId=502&sessionId=37& confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=502&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of Low Mass Electron-Positron Pairs with ALICE Low Mas s e+e--Pair DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-503@cern.ch DESCRIPTION:Speakers: BAUMANN\, Christoph (Johann-Wolfgang-Goethe Univ. (D E))\, KOHLER\, Markus (GSI - Helmholtzzentrum fur Schwerionenforschung Gmb H (DE))\nDirect photons are an important probe of the hot and dense medium created in heavy-ion collisions because they do not interact with the med ium and therefore carry information of all stages of the collision.\nAt lo w momenta\, thermal emission\, which would provide the ideal measurement o f temperature of the quark-gluon plasma\, is expected to dominate over oth er sources of direct photons. However\, since the fraction of thermal phot on is small\, the measurement of direct photons is notoriously difficult d ue to the large background from hadronic decay photons. These difficulties can be overcome by measuring virtual photons detected as internal convers ion into electron-positron pairs.\nALICE uses its excellent tracking and p article identification capabilities at very low momenta to perform this me asurement in the Pb-Pb collisions collected in 2011 at sqrt(s_NN) = 2.76 T eV.\nDetails of the measurement and status of the analysis will be present ed.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=503&sessionI d=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=503&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Phi meson production in Pb-Pb collisions at sqrt(s_NN) = 2.76 TeV at the CERN LHC with ALICE DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-500@cern.ch DESCRIPTION:Speakers: URAS\, Antonio (Universite Claude Bernard-Lyon I (FR ))\nStrangeness production provides one of the key observables to characte rize the hot and dense state of strongly interacting matter produced in hi gh-energy nuclear collisions. To access this information\, ALICE measured phi meson production both in proton-proton and Pb-Pb collisions at sqrt(s_ NN) = 2.76 TeV in the dimuon channel\, in the rapidity region 2.5 \n\nhttp ://indico.cern.ch/contributionDisplay.py?contribId=500&sessionId=37&confId =181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=500&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Dimuon measurements in ALICE: The Muon Forward Tracker Upgrade Pro ject DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-501@cern.ch DESCRIPTION:Speakers: URAS\, Antonio (Universite Claude Bernard-Lyon I (FR ))\nThe ALICE experiment is dedicated to the study of the quark gluon plas ma in heavy-ion collisions at the CERN LHC. The Muon Forward Tracker (MFT) is under consideration by the ALICE Experiment to be part of its programm e of detectors upgrade to be installed during the LHC shutdown planned for 2018. The MFT is a silicon pixel detector added in the Muon Spectrometer acceptance ($2.5 \n\nhttp://indico.cern.ch/contributionDisplay.py?contribI d=501&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=501&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Azimuthal Anisotropy Results from STAR DTSTART;VALUE=DATE-TIME:20120813T195500Z DTEND;VALUE=DATE-TIME:20120813T202000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-630@cern.ch DESCRIPTION:Speakers: CEBRA\, Daniel (UC Davis)\nhttp://indico.cern.ch/con tributionDisplay.py?contribId=630&sessionId=1&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=630&sessionId=1 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Results on flow from ALICE DTSTART;VALUE=DATE-TIME:20120813T205000Z DTEND;VALUE=DATE-TIME:20120813T211500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-631@cern.ch DESCRIPTION:Speakers: VOLOSHIN\, Sergey (Wayne State University (US))\nhtt p://indico.cern.ch/contributionDisplay.py?contribId=631&sessionId=43&confI d=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=631&sessionId=4 3&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Overview of results on flow and correlations from the CMS collabor ation DTSTART;VALUE=DATE-TIME:20120813T211500Z DTEND;VALUE=DATE-TIME:20120813T214000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-632@cern.ch DESCRIPTION:Speakers: SANDERS\, Stephen James (University of Kansas (US))\ nThis talk will present an overview of collective flow phenomena and dihad ron correlations from the CMS experiment at the LHC in pp and PbPb collisi ons. Fourier components of the anisotropic azimuthal distribution\, rangin g from the second to the sixth component\, are obtained using different an alysis techniques\, which have different sensitivities to non-flow and flo w fluctuation effects. Utilizing a novel and unique high-pT single-track h igh-level trigger\, the results are presented over a broad pT range up to approximately 60 GeV/c\, as a function of pseudorapidity and collision cen trality. These new data will provide essential information on both the hyd rodynamic properties of the medium at low pT and path length dependence of in-medium parton energy loss at high pT. Dihadron correlations are measur ed over a wide acceptance and pT range. Long-range near-side ("ridge") cor relation structures are observed from low pT (1 GeV/c) to very high pT (at least 20 GeV/c). Their connection to the single-particle azimuthal anisot ropy is extensively investigated via the factorization studies of Fourier decomposition of dihadron correlations. Short-range jet-like correlations are also systematically studied as a function of pT\, pseudorapidity\, cen trality and compared to the results in pp collisions.\n\nhttp://indico.cer n.ch/contributionDisplay.py?contribId=632&sessionId=43&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=632&sessionId=4 3&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:ATLAS Flow & Correlations DTSTART;VALUE=DATE-TIME:20120813T214000Z DTEND;VALUE=DATE-TIME:20120813T220500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-633@cern.ch DESCRIPTION:Speakers: TRZUPEK\, Adam (Polish Academy of Sciences (PL))\nht tp://indico.cern.ch/contributionDisplay.py?contribId=633&sessionId=43&conf Id=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=633&sessionId=4 3&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Extraction of transport coefficients DTSTART;VALUE=DATE-TIME:20120813T220500Z DTEND;VALUE=DATE-TIME:20120813T223000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-634@cern.ch DESCRIPTION:Speakers: SONG\, Huichao ()\nhttp://indico.cern.ch/contributio nDisplay.py?contribId=634&sessionId=43&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=634&sessionId=4 3&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Influence of background subtraction on jet reconstruction in heavy -ion collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-468@cern.ch DESCRIPTION:Speakers: APOLINÁRIO\, Liliana (Universidade de Santiago de C ompostela)\nIn order to get information about the characteristics of the m edium produced in high-energy heavy-ion collisions using reconstructed jet s\, the effect of background subtraction has to be well under control. In this study\, we address this issue by embedding jets in a heavy-ion event and then considering the influence of the subtraction method and of differ ent backgrounds\, characterized by different mean values and fluctuations\ , on the momentum imbalance and azimuthal distributions of the two leading jets in each event. Two different background modelings - a detailed Monte Carlo and a flexible toy model\, and two subtraction methods - an area-ba sed one similar to that used by ALICE and ATLAS\, and a pedestal subtracti on technique using the information in calorimetric cells resembling the on e employed by CMS\, are examined. We also consider the effect of quenching using the Q-PYTHIA Monte Carlo\, and some additional background character istics like elliptic flow. Our aim is to understand the possible differenc es between the results using the two reconstruction techniques\, and how t hey react to the mentioned modifications of the signal and background.\n\n http://indico.cern.ch/contributionDisplay.py?contribId=468&sessionId=37&co nfId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=468&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Theoretical overview of jet quenching DTSTART;VALUE=DATE-TIME:20120814T123000Z DTEND;VALUE=DATE-TIME:20120814T125000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-636@cern.ch DESCRIPTION:Speakers: TEIXEIRA DE ALMEIDA MILHANO\, Guilherme (Instituto S uperior Tecnico (PT))\nhttp://indico.cern.ch/contributionDisplay.py?contri bId=636&sessionId=35&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=636&sessionId=3 5&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:ATLAS Jets DTSTART;VALUE=DATE-TIME:20120814T125000Z DTEND;VALUE=DATE-TIME:20120814T131000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-637@cern.ch DESCRIPTION:Speakers: SPOUSTA\, Martin (Columbia University and Charles Un iversity)\nhttp://indico.cern.ch/contributionDisplay.py?contribId=637&sess ionId=35&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=637&sessionId=3 5&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Results on jet spectra and structure from ALICE DTSTART;VALUE=DATE-TIME:20120814T131000Z DTEND;VALUE=DATE-TIME:20120814T133000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-638@cern.ch DESCRIPTION:Speakers: Dr. MORSCH\, Andreas (CERN)\nhttp://indico.cern.ch/c ontributionDisplay.py?contribId=638&sessionId=35&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=638&sessionId=3 5&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Overview of results on jets from the CMS collaboration DTSTART;VALUE=DATE-TIME:20120814T133000Z DTEND;VALUE=DATE-TIME:20120814T135000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-639@cern.ch DESCRIPTION:Speakers: Dr. VERES\, Gabor (CERN)\nhttp://indico.cern.ch/cont ributionDisplay.py?contribId=639&sessionId=35&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=639&sessionId=3 5&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Lambda-Lambda correlation in high-energy heavy-ion collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-466@cern.ch DESCRIPTION:Speakers: OHNISHI\, Akira (Kyoto University)\nWe study Lambda- Lambda correlation in high-energy heavy-ion collisions based on the Lambda -Lambda interactions proposed so far. Lambda-Lambda interaction and the ex istence of H-dibaryon are long-standing problems in hadron physics. Since high-energy heavy-ion collisions at RHIC and LHC can be utilized as the ex otic hadron factories [1]\, they would also provide information on exotic interactions such as Lambda-Lambda\, Lambda-Sigma\, Lambda-Xi interactions \, which are important to understand neutron star matter EOS. We have anal yzed recent STAR data [2] and find that small negative scattering length ( 1/a_0 3 fm) are favored for Lambda-Lambda interaction [3]. This is consis tent with quark model interaction (fss2)\, recent boson exchange potential (NSC97)\, and old boson exchange potentials (ND\, NF) with large hard-cor e radius. In the presentation\, we first discuss how precisely we can cons train Lambda-Lambda interaction from heavy-ion data. We also discuss the e ffects of feed from heavier hyperons and coupling effects with Xi-N channe l\, and Lambda-Lambda correlation measured in (K-\,K+) reactions [4].\n\n[ 1] S. Cho et al.(ExHIC collab.)\, Phys.Rev.Lett.106\, 212001 (2011).\n[2] Neha Shar et al.(STAR collab.)\, Acta Phys. Pol. B Proc. Suppl. 5\, 593 (2 012) [arXiv:1112.0590].\n[3] A. Ohnishi\, T. Furumoto\, in preparation.\n[ 4] C.J.Yoon et al. (KEK-E522 collab.)\, Phys. Rev. C75\, 022201 (2007)\; A . Ohnishi et al.\, Nucl. Phys. A670\, 297c (2000).\n\nhttp://indico.cern.c h/contributionDisplay.py?contribId=466&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=466&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of the D meson elliptic flow in Pb-Pb collisions at 2. 76 TeV with ALICE. DTSTART;VALUE=DATE-TIME:20120817T184000Z DTEND;VALUE=DATE-TIME:20120817T190000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-460@cern.ch DESCRIPTION:Speakers: CAFFARRI\, Davide (Universita e INFN (IT))\nThe ALIC E experiment at the LHC studies Pb-Pb and pp collisions with the aim of in vestigating the properties of the high-density state of strongly-interacti ng matter\, expected to be produced in Pb-Pb collisions.\nHeavy quarks are sensitive probes to test the medium properties\, since they are formed at shorter time scale with respect to the deconfined state. The elliptic flo w v2 of D meson compared to that of light hadrons is expected to bring ins ights into the degree of thermalization of charm quarks within the quark-g luon plasma.\nD meson have been reconstructed in their hadronic decay chan nels (D0 --> K-pi+\, D+-->K-pi+pi+\, D*+-->D0pi+)\, in the central rapidit y region in Pb-Pb collisions at sqrt{s_NN}=2.76 TeV\, with data collected in the 2011 run. \nThe measurement of the D meson elliptic flow in semi-ce ntral Pb-Pb collisions will be presented.\n\nhttp://indico.cern.ch/contrib utionDisplay.py?contribId=460&sessionId=23&confId=181055 LOCATION: Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=460&sessionId=2 3&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Nuclear Modifi cation Factor and Elliptic Flow of Muons from Open Heavy Flavour Decays at Forward Rapidity in Pb-Pb Collisions at 2.76 TeV w ith ALICE DTSTART;VALUE=DATE-TIME:20120817T215000Z DTEND;VALUE=DATE-TIME:20120817T221000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-463@cern.ch DESCRIPTION:Speakers: ZHANG\, Xiaoming (Univ. Blaise Pascal Clermont-Fe. I I (FR))\nHeavy quark production is one of the probes for investigating the properties of the high-density medium formed in heavy-ion collisions at h igh energy. The suppression of heavy flavour production\, at high momentum \, quantifi\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=463& sessionId=56&confId=181055 LOCATION: Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=463&sessionId=5 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Azimuthal angular correlations between heavy flavour decay electr ons and charged hadrons in pp collisions at 2.76 TeV with the ALICE experi ment DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-462@cern.ch DESCRIPTION:Speakers: THOMAS\, Deepa (University of Utrecht (NL))\nThe mea surement of heavy-flavour (charm and beauty) production in ultra-relativis tic heavy ion collisions provides an important test of the parton energy l oss mechanism and its predicted color charge and parton mass dependencies. The suppression of electron yields from semi-leptonic decays of D and B m esons in Pb-Pb collisions at the LHC has been observed to be large. Becaus e of the dead-cone effect\, heavy quarks are expected to loose less energy than light quarks if the dominant energy loss mechanism is gluon radiatio n. The suppression expected on the basis of energy loss depends on the re lative contribution of D and B hadrons to the total yield. Therefore\, it is important to separate these contributions.\nThe relative contribution o f beauty decays to the total electron yield from heavy flavour decays can be isolated by looking at azimuthal correlation between these electrons an d charged hadrons\, exploiting the different decay kinematics of D and B h adrons.\nIn this talk\, we present results on the relative beauty contribu tion to the heavy flavour decay electron yield and the beauty production c ross section in the pt range 2.5-10 GeV/c in pp collisions at sqrt(s) = 2. 76 TeV recorded in 2011 with the ALICE experiment. The results are compare d to predictions from next-to-leading order perturbative QCD calculations. In addition\, the status of the same analysis in Pb-Pb collisions at sqrt (sNN) = 2.76 TeV is presented.\n\nhttp://indico.cern.ch/contributionDispla y.py?contribId=462&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=462&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Study of the Sixth Order Cumulant of Net-proton Distributions Meas ured in STAR at RHIC DTSTART;VALUE=DATE-TIME:20120814T212500Z DTEND;VALUE=DATE-TIME:20120814T214500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-168@cern.ch DESCRIPTION:Speakers: Ms. CHEN\, Lizhu (Central China Normal University)\n In high-energy nuclear collisions\, we study the properties of the excited nuclear matter with QCD degrees of freedom and search for the signals of the QCD phase transition. The ratios of the cumulants of conserved number distributions are sensitive to the correlation length of the system create d in heavy-ion collisions\, hence they are considered as good observables to study phase transitions. QCD based calculations suggests that the ratio s of the sixth to second ($C_{6}/C_{2}$) order cumulants of the net baryon number distributions will change rapidly in the phase transition region o f the QCD phase diagram. They are found to deviate considerably from predi ctions of the hadron resonance gas model which reproduce the fourth to sec ond ($C_{4}/C_{2}$) order cumulants of the net proton number distributions at RHIC top energies.\n \nThe STAR experiment\, with large and uniform ac ceptance and excellence in particle identification\, is ideal to study the QCD phase structure. The data collected in 2010 and 2011 allow us to stud y the $C_{6}/C_{2}$ ratio. In this talk\, we will present the ratio of the sixth to second order cumulants of net-proton multiplicity distributions from minimum biased Au+Au collisions at $\\sqrt{s_{NN}}$ = 19.6\, 27\, 39\ , 62.4 and 200 GeV. Both protons and anti-protons are cleanly identified w ithin $|y|\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=168&s essionId=49&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=168&sessionId=4 9&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Systematic Investigation of Partonic Collectivity through Centrali ty Dependence of Elliptic Flow of Multi-strange Hadrons in Au+Au collision s at 200 GeV in STAR DTSTART;VALUE=DATE-TIME:20120815T141000Z DTEND;VALUE=DATE-TIME:20120815T143000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-169@cern.ch DESCRIPTION:Speakers: Mr. MD\, NASIM (Variable Energy Cyclotron Centre)\nO ne of the main goals of the STAR experiment at Relativistic Heavy\nIon Col lider (RHIC) is to study the properties of the QCD\nmatter at extremely hi gh energy and parton densities\,\ncreated in the heavy-ion collisions. Und erstanding the\npartonic collectivity through the measurement of elliptic\ nflow ($v_{2}$) of multi-strange hadrons ($\\phi$\, $\\Xi$ and $\\Omega$)\ nis believed to be a sensitive way to characterize the system\ncreated in the heavy-ion collisions. Multi-strange hadrons\nfreeze-out close to the q uark-hadron transition temperature\npredicted by lattice QCD. They also ha ve small hadronic\ninteraction cross sections. Hence\, the multi-strange h adrons\nare expected to provide information from the partonic stage\nof th e evolution in heavy-ion collisions. Furthermore\, the multi-strange hadro n anisotropic flow in heavy-ion collisions when compared to those from $K _{s}^{0}$ and $\\Lambda$\, single strange valence quark carrying hadrons\, will be useful for understanding the collective dynamics of the strange q uarks.\n\nIn this presentation we will present the new results of elliptic flow\nof multi-strange hadrons ($\\phi$\, $\\Xi$ and $\\Omega$ ) in Au+Au collisions at$\\sqrt{s_{NN}}$= 200 GeV\, using a high statistics data set collected in 2010 by the\nSTAR experiment. Centrality dependence measurem ents of multi-strange\nhadron elliptic flow allow systematic investigation on how partonic\ncollectivity is developed across different sizes of coll ision system.\nThese results will be compared with the elliptic flow measu rements of\nlight hadrons $\\pi^{\\pm}$\, $K^{\\pm}$\, $p(\\bar{p})$\, $K^ {0}_{S}$\n and $\\Lambda (\\bar{\\Lambda})$ . The centrality evolution of the number of quark\nscaling of $v_{2}$ at the intermediate $p_{T}$ will b e presented. The\neffect of re-scattering at the late hadronic stage on el liptic flow\nwill be addressed using the $\\phi$ and $p$ $v_{2}$ measureme nts at the\nlow transverse momentum ($p_{T}$).\n\nhttp://indico.cern.ch/co ntributionDisplay.py?contribId=169&sessionId=7&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=169&sessionId=7 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurements of Non-photonic Electrons Production and Elliptic Flo w in 39\, 62.4 and 200 GeV Au+Au Collisions from STAR at RHIC DTSTART;VALUE=DATE-TIME:20120817T205000Z DTEND;VALUE=DATE-TIME:20120817T211000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-164@cern.ch DESCRIPTION:Speakers: MUSTAFA\, Mustafa (Purdue University)\nHeavy quarks are produced early in the heavy-ion collisions and are expected to interac t with the created strongly interacting partonic medium differently from l ight quarks. Therefore\, they can shed new light on understanding the medi um's properties. Simultaneous measurements of spectra and elliptic flow of electrons from semileptonic decays of heavy flavor hadrons at different c ollision energies and centralities can provide experimental insight to dis tinguish different energy loss theoretical models and to characterize the degree of thermalization of heavy quarks at different energies. We will pr esent STAR measurements of non-photonic electrons at mid-rapidity in Au+Au collisions at $\\sqrt{s_{NN}} = 39$\, $62.4$ and $200$ GeV. The data were taken during 2010 run with detector configurations for minimum photonic c onversion background. Both the invariant yields and elliptic flow measurem ents will be reported as a function of $p_T$\, centrality and collision en ergy. We will also report non-photonic electrons nuclear modification fact or\, $R_{AA}$\, at $\\sqrt{s_{NN}} = 200$GeV.\n\nhttp://indico.cern.ch/con tributionDisplay.py?contribId=164&sessionId=56&confId=181055 LOCATION: Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=164&sessionId=5 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Beam Energy Dependence of Hypertriton Production and Lifetime Meas urement at STAR DTSTART;VALUE=DATE-TIME:20120816T194000Z DTEND;VALUE=DATE-TIME:20120816T200000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-165@cern.ch DESCRIPTION:Speakers: Ms. ZHU\, Yuhui (Shanghai Institute of Applied Physi cs)\nThe hyperon-nucleon(Y-N) interaction is of great physical interest be cause it introduces a new quantum number strangeness in nuclear matter. It is predicted to be the decisive interaction in some high-density matter s ystems\, such as neutron stars [1]. RHIC\, the Relativistic Heavy Ion Coll ider\, provides an ideal laboratory to study Y-N interaction because hyper ons and nucleons are abundantly produced at high energy nucleus-nucleus co llisions.\n\nThe lifetime and decay modes of the hypertriton\, the lightes t hypernucleus\, which consists of a proton\, a neutron and the lightest h yperon Lambda\, and the antimatter hypertriton discovered at RHIC[2]\, pro vide valuable insights into the Y-N interaction.\n\nThe strangeness popula tion factor S3\, defined as $\\frac{{^3_\\Lambda}H/^{3}He}{\\Lambda/p}$\, is a good representation of the local correlation between baryon number an d strangeness[2]. It is predicted that S3 has a different behavior in QGP and pure hadron gas[3\,4] thus can be used as a tool to distinguish Quark- Gluon Plasma (QGP) from a pure hadronic phase.\n\nThe RHIC beam energy sca n program in 2010-2011 allowed STAR to collecte data from Au+Au collisions over a broad range of energies. This provides an opportunity to study the beam energy dependence of S3. In addition\, due to the beam energy indepe ndence of our lifetime measurement method\, with increased statistics of p resent datasets\, an improved result of lifetime measurement of hypertrito n can be obtained.\n\nIn this talk\, the hypertriton analysis results for Au+Au collisions at $\\sqrt{s_{NN}}$ = 7.7\, 11.5\, 19.6\, 27\, 39 and 200 GeV will be presented. With the excellent particle identification of Time Projection Chamber\, we are able to reconstruct $^{3}_{\\Lambda}H$($^{3}_ {\\bar{\\Lambda}}\\bar{H}$) via its two-body decay channel to $^{3}He$ and $\\pi^{-}$($\\overline{^{3}He}$ and $\\pi^{+}$). The combined $^{3}_{\\La mbda}H$ plus $^{3}_{\\bar{\\Lambda}}\\bar{H}$ raw yield is about 600 and i ts significance can reach 9.5$\\sigma$. With this increased statistics\, o ur lifetime measurement will be presented and the beam energy dependence o f S3 will also be discussed.\n\n[1]J. M. Lattimer\, M. Prakash\, Science { \\bf304}\, 536 (2004)\n\n[2]B. I. Abelev {\\it et al.}(STAR Collaboration) \, Science {\\bf328}\, 58 (2010)\n\n[3]S. Zhang {\\it et al.}\, Phys. Let t. B. {\\bf 684}\, 224 (2010)\n\n[4]J. Steinheimer {\\it et al.}\, arXiv: 1203.2547v1\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=165& sessionId=15&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=165&sessionId=1 5&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Search for QCD Phase Transitions and the Critical Point Utilizing Particle Ratio Fluctuations and Transverse Momentum Correlations from the STAR Experiment. DTSTART;VALUE=DATE-TIME:20120814T204500Z DTEND;VALUE=DATE-TIME:20120814T210500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-167@cern.ch DESCRIPTION:Speakers: Mr. TRIBEDY\, Prithwish (for the STAR collaboration) \nDynamical fluctuations in globally conserved quantities such as baryon\n number\, strangeness\, charge\, and isospin are suggested to carry informa tion about the de-confinement and chiral phase transitions. An\nobservatio n of enhanced dynamical fluctuations or non-monotonic behavior of transver se momentum correlations as a function of colliding energy might indicate the system has probed the predicted QCD critical point.\n\nThe STAR experi ment has performed a comprehensive study of the energy\nand charge depende nce of dynamical particle ratio ($K/\\pi$\, $p/\\pi$\,\nand $K/p$) fluctua tions\, net-charge fluctuations\, and transverse\nmomentum correlations in the STAR TPC at mid-rapidity\, as well as\nneutral-charge pion fluctuatio ns at forward rapidity. The charge\ndependence of particle ratio fluctuati ons exhibit differences between\nsame and opposite sign dynamical particle ratio fluctuations compared\nto inclusive charged dynamical fluctuations. Neutral-charge pion\nfluctuations at forward rapidity are measured by det ecting neutral pion\ndecay photons in the Photon Multiplicity Detector and charged pions by the Forward Time Projection Chamber\, which cover the sa me pseudorapidty\nregion.\n\nThe centrality\, energy\, and charge dependen ce from new measurements of the fluctuation observables $\\nu_{dyn}$ and $ r_{m\,1}$ and the energy dependence of transverse momentum correlations fr om $\\sqrt{s_{NN}}$ = 7.7-200 GeV Au+Au collisions will be presented. Thes e results are also compared to theoretical predictions from models such as HIJING and UrQMD.\n\nhttp://indico.cern.ch/contributionDisplay.py?contrib Id=167&sessionId=49&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=167&sessionId=4 9&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Getteing primordial baryon number fluctuation from observed proton number fluctuation in relativistic heavy ion collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-160@cern.ch DESCRIPTION:Speakers: Prof. ASAKAWA\, Masayuki (Osaka University)\nWe expl ore the relation between proton and nucleon numberfluctuations in the fina l state in relativistic heavy ion collisions. It is shown that the correla tions between the isospins of nucleons in the final state are almost negli gible over a wide range of collision energy. This leads to a factorization of the distribution function of the proton\, neutron\, and their antipart icles in the final state with binomial distribution functions. Using the f actorization\, we derive formulas to determine nucleon number cumulants\, which are not direct experimental observables\, from proton number fluctua tions which are experimentally observable in event-by-event analyses.\nWit h a simple treatment for strange baryons\, the nucleon number\ncumulants a re further promoted to the baryon number ones. \nExperimental determinatio n of the baryon number cumulants makes\nit possible to compare various the oretical stduies on them directly with experiments. Effects of nonzero iso spin density on this formula are addressed quantitatively. It is shown tha t the effects are well suppressed over a wide energy range.\n\nhttp://indi co.cern.ch/contributionDisplay.py?contribId=160&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=160&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Effect of longitudinal fluctuation in event-by-event (3+1)D hydrod ynamics DTSTART;VALUE=DATE-TIME:20120815T152000Z DTEND;VALUE=DATE-TIME:20120815T154000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-161@cern.ch DESCRIPTION:Speakers: PANG\, Long-Gang (l)\nHadron spectra and elliptic fl ow in high-energy heavy-ion collisions are studied within a (3+1)D ideal h ydrodynamic model with fluctuating initial conditions given by the AMPT Mo nte Carlo model and compared to experimental data. Fluctuation in the init ial energy density comes from not only the coherent soft interaction of ov erlapping nucleons but also the number of mini-jets within each binary nuc leon collision. Mini-jets produced via semi-hard parton scatterings are as sumed to be locally thermalized through a Gaussian smearing and give rise to fluctuation in rapidity distribution along the longitudinal direction. The longitudinal fluctuation is found to lead to sizable reduction of elli ptic flow at large transverse momentum.\n\nhttp://indico.cern.ch/contribut ionDisplay.py?contribId=161&sessionId=54&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=161&sessionId=5 4&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Electroweak boson-tagged jet event asymmetries at the Large Hadron Collider DTSTART;VALUE=DATE-TIME:20120814T193500Z DTEND;VALUE=DATE-TIME:20120814T195500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-162@cern.ch DESCRIPTION:Speakers: Dr. VITEV\, Ivan (LANL)\nTagged jet measurements pro vide a promising experimental channel to quantify the similarities and dif ferences in the mechanisms of jet production in proton-proton and nucleus- nucleus collisions. We present the first calculation of the transverse mom entum asymmetry of $Z^0/\\gamma^*$-tagged jet events in $\\sqrt{s}=2.76$~T eV reactions at the LHC. Our results combine the ${\\cal O}(G_F\\alpha_s^2 )$ perturbative cross sections with the radiative and collisional processe s that modify parton showers in the presence of dense QCD matter. We find that a strong asymmetry is generated in central lead-lead reactions that h as little sensitivity to the fluctuations of the underlying soft hadronic background. We present theoretical model predictions for its shape and mag nitude. We also demonstrate the connection of our results to photon-tagged jet events and inclusive electroweak boson production.\n\nhttp://indico.c ern.ch/contributionDisplay.py?contribId=162&sessionId=3&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=162&sessionId=3 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Can falling strings in deformed AdS geometries account for the sur prising transparency of the sQGP at LHC? DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-163@cern.ch DESCRIPTION:Speakers: FICNAR\, Andrej (Columbia University in the City of New York)\nWe present new solutions for holographic falling string models of light quark jet energy loss that suggest a linear path dependence of en ergy loss\, dE/dx ~ x^1\, without the nonlinear x^2 dependence assumed pre viously. This effect\, combined with non-conformal deformations and higher curvature corrections of AdS geometry\, is shown to be able to account fo r the small relative reduction of the jet-medium coupling observed via RAA (pT) at LHC in the 20-50 GeV pT region.\n\nhttp://indico.cern.ch/contribut ionDisplay.py?contribId=163&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=163&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Scaling of high momentum harmonics: constraining energy loss model s\, and looking for opacity changes DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-9@cern.ch DESCRIPTION:Speakers: TORRIERI\, Giorgio (JW Goethe Universitat\, Frankfur t)\nIn this talk we show that azimuthal harmonics of hard particles\, thou ght to be generated via parton energy loss\, should scale differently w.r. t. multiplicity and system size to azimuthal harmonics of soft particles\, thought to be generated by hydrodynamic response.\nBy scanning harmonics in both energy and system size\, we obtain a way of determining the domain of validity of the\n"hydrodynamic" vs. the "tomographic" regime at differ ent energies.\nSuch scaling studies would further help to isolate the ener gy-loss\nregime relevant for RHIC and LHC energies (Bethe-Heitler\, LPM\, AdS/CFT)\nand to isolate changes in the intensive properties of the system \, such as opacity and entropy density\, using "hard" observables.\nIn par ticular\, a scaling breaking could be instrumental in finding\nchanges in such intensive quantities\, and would provide a direct link\nbetween jet s uppression and the onset of partonic degrees of freedom.\n\nBased on ongoi ng work with the model described in \nhttp://arxiv.org/abs/1102.5416\n\nht tp://indico.cern.ch/contributionDisplay.py?contribId=9&sessionId=37&confId =181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=9&sessionId=37& confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Hadron-jet correlations measured in pp and Pb-Pb collisions in LHC -ALICE DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-438@cern.ch DESCRIPTION:Speakers: WATANABE\, Daisuke (University of Tsukuba (JP))\nHea vy-ion experiments at the highest beam energy in the world (Pb-Pb at sqrt( s_NN) = 2.76 TeV) have started in 2010 at the Large Hadron Collider (LHC) at CERN. At the LHC\, jet production is more abundant than at RHIC. Jet me asurements play a critical role not only for probing the hot and high ener gy density matter in heavy ion collisions through parton energy loss\, but also to observe possible modifications of the hot and dense matter itself by the lost energy.\nHadron-jet correlations allow us to maximize the pat hlength of the parton through the medium by selecting trigger hadrons with high transverse momenta that are biased to coming from the surface of the QGP.\nIn this poster\, we report the current analysis status of the recoi l jet yield with charged particle triggers in Pb-Pb collisions from 2011 a t sqrt(s_NN) = 2.76 TeV. We will also compare these results with correlati on from baseline pp measurements at the same collision energy.\n\nhttp://i ndico.cern.ch/contributionDisplay.py?contribId=438&sessionId=37&confId=181 055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=438&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Heavy quark production and energy loss DTSTART;VALUE=DATE-TIME:20120814T161500Z DTEND;VALUE=DATE-TIME:20120814T163500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-646@cern.ch DESCRIPTION:Speakers: HOROWITZ\, William (University of Cape Town)\nhttp:/ /indico.cern.ch/contributionDisplay.py?contribId=646&sessionId=6&confId=18 1055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=646&sessionId=6 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Jet-Hadron Azimuthal Correlation Measurements in pp Collisions at sqrt{s} = 2.76 TeV and 7 TeV with ALICE DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-436@cern.ch DESCRIPTION:Speakers: SAKATA\, Dosatsu (University of Tsukuba (JP))\nIn he avy-ion collisions\, jet properties are expected to be modified by the int eraction with the hot and dense medium. The modification is strongly relat ed with properties of hot and dense matter and the study of jet properties is a versatile probe for the properties of the QGP.\nHowever\, in heavy-i on collisions it is difficult to recover the jet quenching effects at smal l particle momentum due to large backgrounds from thermal bulk in such a m ulti-body system.\nThe measurement of hadrons with respect to a reconstruc ted jet allows to relate more directly the momentum and direction of the o riginal parton to the distribution of its fragmentation products.\nThe stu dy of these correlations in pp collisions provides the baseline for simila r measurement in Pb-Pb collisions.\nWe will present results of Jet-hadron azimuthal correlation studies in pp collisions at 2.76TeV and 7TeV. These results provide information on the jet energy (or momentum)\, jet shape\, distribution of constituent particles in jet and background level in these systems.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=436&se ssionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=436&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurements of charged particle jet properties in pp collisions a t sqrt{s} = 7 TeV using ALICE at the LHC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-437@cern.ch DESCRIPTION:Speakers: PRASAD\, Sidharth Kumar (Wayne State University (US) )\nWe present results of a study of charged particle jet properties in pp\ ncollisions at $\\sqrt{s}$ = 7 TeV using the ALICE detector. \nJets are r econstructed using charged tracks at mid-rapidity with the\nanti-$\\rm k_{ t}$ [1] jet finding algorithm from FastJet.\nWe will discuss the transvers e momentum dependence of three jet\nproperties: charged particle multiplic ity\, jet size\, and radial\ndistribution of transverse momentum about the jet direction for jets\nin the $\\rm p_{t}$ range from 20 to 100 GeV/c. T he results are\ncompared with available model predictions. These measureme nts in $pp$\ncollisions will form the baseline for similar measurements in the more\ncomplex environment of A+A collisions. \n\nReferences\n[1] M. Cacciari and P. Salam\, arXiv:0802.1189v1[hep-ph]\, 2008.\n\nhttp://ind ico.cern.ch/contributionDisplay.py?contribId=437&sessionId=37&confId=18105 5 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=437&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Nonperturbative Heavy-Flavor Diffusion and Hadronization in a Hydr odynamic Description of Heavy-Ion Collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-357@cern.ch DESCRIPTION:Speakers: Dr. HE\, Min (Cyclotron Institute\, Texas A&M Univer sity)\nWe compute open heavy-flavor (HF) transport in relativistic heavy-i on collisions by combining a strong-coupling treatment in both macro- and microscopic dynamics (hydro and nonperturbative diffusion interactions) [1 ]. The hydrodynamic bulk evolution is quantitatively constrained by bulk a nd multi-strange hadron spectra and elliptic flow [2]. In the Quark-Gluon Plasma (QGP) phase\, heavy-quark diffusion coefficients are taken from a n on-perturbative $T$-matrix approach. The latter leads to resonance formati on close to Tc which is implemented as a hadronization (recombination) mec hanism on a hydrodynamic hypersurface. In the hadronic phase\, the diffusi on of HF mesons is obtained from effective hadronic theory [3]. We compute observables at RHIC and LHC for both HF mesons and non-photonic electrons . In particular\, we suggest the R_AA and v_2 of the D_s mesons as a uniqu e observable due to the coupling of charm to the strangeness enhancement i n AA collisions [4]\, which allows to quantitatively test key components o f our approach\, including recombination and hadronic diffusion effects.\n \nReferences:\n\n[1] M. He\, R. J. Fries and R. Rapp\, arXiv:1106.6006 [nu cl-th].\n[2] M. He\, R. J. Fries and R. Rapp\, Phys. Rev. C85\, 044911 (20 12).\n[3] M. He\, R. J. Fries and R. Rapp\, Phys. Lett. B701\, 445 (2011). \n[4] M. He\, R. J. Fries and R. Rapp\, arXiv:1204.4442 [nucl-th].\n\nhttp ://indico.cern.ch/contributionDisplay.py?contribId=357&sessionId=37&confId =181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=357&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:A Technique for Charm and Beauty Separation via DCA Unfolding DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-356@cern.ch DESCRIPTION:Speakers: MCCUMBER\, Michael (University of Colorado)\nThe PHE NIX experiment at the Relativistic Heavy Ion Collider recently took data i n p+p and Au+Au collisions with a new silicon vertex detector (VTX). This upgrade detector is capable of measuring the off-vertex decay of heavy fla vor decay electrons via distance of closest approach (DCA). The resulting measured DCA distributions will be a convolution of the parent meson momen ta\, decay lifetimes\, and yields\, combined with detector irresolution an d backgrounds. We will describe an algorithm to unfold the full set of DCA distributions as a function of p_{T}\, thereby allowing improved extracti on of the charm and beauty yields. The progress for applying this techniqu e to the heavy ion collision VTX data set will also be shown.\n\nhttp://in dico.cern.ch/contributionDisplay.py?contribId=356&sessionId=37&confId=1810 55 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=356&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Collective flow in relativistic heavy ion collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-355@cern.ch DESCRIPTION:Speakers: Prof. JIPA\, Alexandru (Faculty of Physics\, Univers ity of Bucharest)\nHeavy-ion collisions at relativistic energies ofer an u nique opportunity to probe highly excited dense nuclear matter with proper ties very diferent from that of a hadron gas or ordinary nuclear matter in the laboratory. An interesting phenomenon at the kinetic freeze-out stage of the system evolution is the collective transverse expansion as it is e ntirely generated during the collision and therefore reflect the collision dynamics. Experimental data collected at RHIC have shown that the system produced in Au-Au collisions is thermalized and undergoes a strong collect ive expansion\, that could be characterized by the Hubble law. The measura ble observables that can provide information about thermalization and coll ective flow are the transverse momentum spectra of produced particles. The expansion rate at “thermal freeze-out” provides the nuclear collision analogue of the Hubble constant for the Big Bang\, while the correspondin g freeze-out temperature parallels the temperature of the cosmic microwave background at the point of photon decoupling. \n\nIn this work we will ma ke an estimate of a Hubble parameter for relativistic nuclear collisions s imilar to cosmological Hubble constant\, based on temporal connections bet ween the evolution of nuclear matter produced in a relativistic heavy ion collision and the Universe evolution after the Big Bang. We will present experimental data obtained in Au-Au collisions at RHIC energies and will c ompare with the same parameters obtained from simulated data at future CBM -FAIR energies. \n\nWe will investigate the freeze-out process in heavy i on collisions at CBM-FAIR energies and we will present a study of blast-wa ve fits performed to the transverse momentum spectra obtained from simulat ed heavy ion collisions using the most important simulation codes from thi s field. In addition\, comparisons with results from Au-Au collisions at R HIC energies will be presented to provide more detailed insight into the p roperties of the space-time evolution such as collective dynamics of the d ense matter. We will compare the freeze-out kinetic parameters obtained fr om experimental data at RHIC energies with the same parameters obtained fr om simulated data at future CBM-FAIR energies using the most important sim ulation codes from this field.\n\nhttp://indico.cern.ch/contributionDispla y.py?contribId=355&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=355&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Fluctuating Hydrodynamics Confronts the Rapidity Dependence of Tra nsverse Momentum Fluctuations DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-354@cern.ch DESCRIPTION:Speakers: GAVIN\, Sean (Wayne State University)\nInterest in t he development of the theory of fluctuating hydrodynamics is growing [1]. Early efforts suggested that viscous diffusion broadens the rapidity depen dence of transverse momentum correlations [2]. That work stimulated an exp erimental analysis by STAR [3]. We attack this new data along two fronts. First\, we compute STAR’s fluctuation observable using the NeXSPheRIO co de\, which combines fluctuating initial conditions from a string fragmenta tion model with deterministic viscosity-free hydrodynamic evolution [4]. W e find that NeXSPheRIO produces a longitudinal narrowing\, in contrast to the data. Second\, we study the hydrodynamic evolution using second order causal viscous hydrodynamics including Langevin noise. We obtain a determi nistic evolution equation for the transverse momentum density correlation function. We use the latest theoretical equations of state and transport coefficients to compute STAR’s observable. The results are in excellent accord with the measured broadening. In addition\, we predict features of the distribution that can distinguish 2nd and 1st order diffusion. \n \nJ. Kapusta\, B. Mueller\, M. Stephanov\, arXiv:1112.6405 [nucl-th].\n\nS. Ga vin and M. Abdel-Aziz\, Phys. Rev. Lett. 97\, 162302 (2006)\, arXiv:nucl-t h/0606061.\n\nH. Agakishiev et al.\, STAR\, Phys. Lett. B704\, 467 (2011)\ , arXiv:1106.4334 [nucl-th].\n\nM. Sharma\, C. Pruneau\, S. Gavin\, J. Tak ahashi\, R. Derradi de Souza\, T. Kodama\, Phys. Rev. C84\, 054915\, (2011 )\, arXiv:1107.3587 [nucl-th].\n\nhttp://indico.cern.ch/contributionDispla y.py?contribId=354&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=354&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The sPHENIX Barrel Upgrade: Jet Physics and Beyond DTSTART;VALUE=DATE-TIME:20120817T182000Z DTEND;VALUE=DATE-TIME:20120817T184000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-353@cern.ch DESCRIPTION:Speakers: HAGGERTY\, John (Brookhaven National Laboratory)\nTh e past decade of heavy ion physics at RHIC has produced many\nsurprising d iscoveries and puzzles. Currently the experiments at the\nLHC are providin g a first look at things to come: a burgeoning program\nfor studying the Q uark Gluon Plasma with reconstructed jets. The\nPHENIX collaboration is in the process of developing a long term plan\ninvolving a series of aggress ive upgrades designed to expand the\nphysics capabilities and make use of the full enhanced luminosity at\nRHIC. With increased coverage and the add ition of hadronic\ncalorimetry\, we will demonstrate that the sPHENIX upgr ade will be well\npositioned to provide a broad and exciting program of je t probe\nmeasurements. Sampling 50 billion Au+Au events annually\, we will \ncollect 10 million jets with transverse energy above 20 GeV and 100\ntho usand jets above 40 GeV. With the addition of tracking layers and\nan EM p reshower\, a crucial program of upsilon measurements\, as well as\nneutral pion and direct photon measurements with a 40 GeV/c reach\, can\nbe made in a flexible accelerator facility capable of providing a\ndiverse range o f collision systems across many beam energies. And\,\nultimately\, the sPH ENIX detector will provide the base for staging a\nfuture electron-ion col lider detector at eRHIC.\n\nhttp://indico.cern.ch/contributionDisplay.py?c ontribId=353&sessionId=25&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=353&sessionId=2 5&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Status of the analysis using the Forward Vertex Detector at PHENIX DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-351@cern.ch DESCRIPTION:Speakers: DA SILVA\, Cesar Luiz (L)\nThe Forward Vertex Detect or (FVTX) was installed in PHENIX this year\nand operated during the $\\sq rt{s}=$510 GeV $p$+$p$\,\n$\\sqrt{s_{NN}}=$193 GeV U+U\, and $\\sqrt{s_{NN }}=$200 GeV Cu+Au\nruns. The FVTX has full azimuthal coverage between 1.2$ \n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=351&sessionId=3 7&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=351&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Initial state and 3D-hydrodynamic studies of heavy ion collisions with the proposed sPHENIX forward detector. DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-350@cern.ch DESCRIPTION:Speakers: Dr. SILVA\, Cesar L. for the PHENIX Collaboration (L os Alamos National Lab)\nThe hydrodynamic behavior of the strongly interac ting Quark-Gluon Plasma (QGP) has mostly been studied at mid-rapidity and important additional constraints on the longitudinal expansion of the medi um\nare needed\, in particular to help in constraining the initial state. The forward rapidity bulk medium initial state is also sensitive to low-x partons in one nucleus and high-x partons in the other. Local thermaliza tion implies that different rapidity slices have different thermodynamic p roperties\, including significantly higher baryon chemical potential. \n\ nThe PHENIX experiment is proposing a major suite of upgrades called sPHEN IX that includes a new forward rapidity spectrometer with high precision t racking\, particle identification\, and calorimetry. \nThe new detector i s aiming to cover down to very forward angles and study hard probes such a s heavy flavor\, jets\, photons and high pT hadrons. This poster will deta il the layout of this new forward \nspectrometer and discuss how we will p in down the 3-dimensional hydrodynamic properties of the QGP.\n\nhttp://in dico.cern.ch/contributionDisplay.py?contribId=350&sessionId=37&confId=1810 55 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=350&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Jet-Tagged Back-Scattering Photons For Quark Gluon Plasma Tomograp hy DTSTART;VALUE=DATE-TIME:20120815T133000Z DTEND;VALUE=DATE-TIME:20120815T135000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-359@cern.ch DESCRIPTION:Speakers: Prof. FRIES\, Rainer (Texas A&M University)\nWe inv estigate the correlations of photons produced by back scattering  of fast partons in quark gluon plasma\n with their away‐side j ets. Back scattering with photon emission\, or jet‐photon conver sion\,\n was originally proposed as a novel source of photons in  Phys. Rev. Lett. 90\, 132301 (2003).\n The unique appeal of th is photon source lies in the fact that its photons carry inform ation about both \nthe medium via a T^2 log 1/T dependence of  the yield and about the energy loss of partons before \nthe bac k scattering occurs. Attempts to identify this source in experime nt through inclusive \ndirect photon spectra or direct photon v_2  at intermediate PT at RHIC have been inconclusive so. \nWe sho w that the capability to measure jets in coincidence with photon s at the upgraded STAR or \nSPHENIX experiment\, or at one of  the LHC experiments\, offers a unique opportunity to identify \nb ack scattering photons at large photon momenta. Jet‐triggered ba ck‐scattering photons \ncan be distinguished from bremsstrahlung  through their strong correlation with the given trigger ET\, \nan d from prompt hard photons through the energy loss of their par ent parton.  \nWe demonstrate with leading and next‐to-leading  order calculations that jet‐triggered\ndirect photon spectra and  nuclear modification factors in nuclear collisions as a function  of photon \nPT show a distinct feature around the trigger ET du e to back‐scattering photons. \nThe height and width of this s tructure are correlated with the medium temperature \nand parton  energy loss spectrum\, respectively.\n \n \n\nhttp://indico.cern.ch/c ontributionDisplay.py?contribId=359&sessionId=10&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=359&sessionId=1 0&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Jet shapes in pp and PbPb collisions at the CMS Experiment DTSTART;VALUE=DATE-TIME:20120815T131000Z DTEND;VALUE=DATE-TIME:20120815T133000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-216@cern.ch DESCRIPTION:Speakers: KURT\, Pelin (Vanderbilt University (US))\nJet shape measurements are important for many applications. When measured in pp col lisions they can be used to constrain generator and showering settings. Wh en measured in PbPb collisions they can be used to probe for distortions f rom energy loss in the hot and dense medium. Fully unfolded jet shape meas urements will be presented and compared with generator expectations in 7 T eV pp collisions\, corresponding to an integrated luminosity of 36$pb^{-1} $. In addition\, jet shape measurements in PbPb collisions will be present ed and compared with observations in 2.76 TeV pp collisions to probe for t he effects of suppression from the medium. The full PbPb data set collecte d in 2011 is analyzed\, corresponding to an integrated luminosity of 150$\ \mu b^{-1}$. The jets are reconstructed with the anti-kT clustering algori thm by utilizing particle-flow objects with a radius parameter R=0.7 and R =0.3.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=216&sessio nId=11&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=216&sessionId=1 1&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Jet fragmentation functions in PbPb and pp collisions at 2.76 TeV with CMS DTSTART;VALUE=DATE-TIME:20120815T135000Z DTEND;VALUE=DATE-TIME:20120815T141000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-217@cern.ch DESCRIPTION:Speakers: MA\, Frank (Massachusetts Inst. of Technology (US))\ nThe jet fragmentation function of inclusive jets with pT > 100 GeV/c in P bPb collisions is measured for reconstructed charged particles with pT > 1 GeV/c within the jet cone. A data sample of PbPb collisions collected in 2011 at a center of mass energy of √sNN =2.76 TeV corresponding to an in tegrated luminosity of Lint = 129 μb−1 is used. The results for PbPb co llisions as a function of collision centrality are compared to reference d istributions based on pp data collected at the same collision energy. For the most central collisions a significant rise of the PbPb/pp fragmentatio n function ratio for the softest fragmentation products with pT \n\nhttp:/ /indico.cern.ch/contributionDisplay.py?contribId=217&sessionId=11&confId=1 81055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=217&sessionId=1 1&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Dynamical higher cumulant ratios of net and total protons at STAR DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-215@cern.ch DESCRIPTION:Speakers: Mr. LI\, Zhiming (Institute of Particle Physics\, CC NU\, Wuhan\, China)\nHigher cumulants of baryon number are suggested to be good\nprobe of Critical Point of QCD phase transition in\nrelativistic he avy ion collisions [1]. However\, since the\nnumber of produced protons is still small at RHIC\, it is\npointed out [2] that the statistical fluctua tion is not\nnegligible\, and should be subtracted from directly measured\ ncumulants. So the dynamical cumulant ratios are suggested.\nMoreover\, it is addressed that the sign of the dynamical net\nproton kurtosis will cha nge to be negative when the critical\npoint is approached from the crossov er side of the phase\ntransition [3].\n\nIn this poster\, we present the e nergy and centrality\ndependence of dynamical net and total proton kurtosi s\nfor Au + Au collisions at $\\sqrt{s_{NN}}$ = 7.7\,\n11.5\, 19.6\, 27\, 39\, 62.4 and 200 GeV at RHIC. The sign of\ndynamical kurtosis of net prot on is discussed and compared\nto those of total proton. The results are al so compared with\nAMPT model calculations.\n\nReferences\n[1] M. A. Stepha nov\, Phys. Rev. Lett. 102\, 032301 (2009)\; R.\nV. Gavai and S. Gupta\, P hys. Lett. B 696 (2011) 459\; C.\nAthanasiou\, et al.\, Phys. Rev. D 82\, 074008 (2010).\n[2] Lizhu Chen\, et al.\, J. Phys. G: Nucl. Part. Phys. 38 \,\n115004 (2011).\n[3] M. Stephanov\, Phys. Rev. Lett. 107\, 052301 (2011 ).\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=215&sessionId =37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=215&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:NLO updates of the EKRT model for central AA collisions at RHIC an d LHC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-212@cern.ch DESCRIPTION:Speakers: Mr. PAATELAINEN\, Risto (University of Jyvaskyla\, F inland)\nThe EKRT model [1] which combines pQCD minijet production with th e saturation of produced gluons and (ideal) hydrodynamics\, has predicted the measured multiplicities in central A + A collisions both at RHIC and L HC remarkably well [2]. Also the published pT spectra of bulk hadrons (at RHIC) have been reproduced quite nicely [3]. We now bring this closed fram ework to NLO as rigorously as possible. In particular\, we calculate the m inijet transverse energy production by using the latest knowledge of nucle ar parton distributions (nPDFs)\, the NLO sets EPS09 [4]\, and discuss how \nthe nPDF uncertainties propagate into the computed hydrodynamical initia l conditions as well as observable multiplicities. Regarding the NLO minij et production\, we develop a new set of infra-red safe measurement functio ns and study their e\n\nhttp://indico.cern.ch/contributionDisplay.py?contr ibId=212&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=212&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Studies of jet quenching and b-jet tagging in PbPb collisions at 2 .76 TeV with CMS DTSTART;VALUE=DATE-TIME:20120814T204500Z DTEND;VALUE=DATE-TIME:20120814T210500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-213@cern.ch DESCRIPTION:Speakers: NGUYEN\, Matthew (Ecole Polytechnique (FR))\nThis pr esentation describes jet measurements in PbPb collisions at a nucleon-nucl eon center-of-mass energy of 2.76 TeV performed with the CMS detector at t he LHC.\n\nWith data from the 2011 Run\, dijet measurements have been exte nded to large transverse momentum\, up to 350 GeV/c. The dijet momentum ba lance and angular correlations are studied in detail as a function of coll ision centrality and leading jet transverse momentum. For the most periphe ral PbPb collisions\, the dijet momentum balance distributions are in good agreement with pp data and with reference calculations at the same collis ion energy. More central collisions show a strong imbalance between the le ading and subleading jet transverse momenta\, which is found to persist to the largest values of leading jet transverse momenta studied.\n\nThe flav or dependence of jet quenching is a powerful handle to discriminate models of parton energy loss in heavy ion collisions. We demonstrate the capacit y of CMS to identify jets initiated by bottom quarks using displaced verti ces reconstructed in the silicon tracking system. The b-jet to inclusive j et ratio is measured in PbPb collisions and compared pp collisions at the same center-of-mass energy.\n\nhttp://indico.cern.ch/contributionDisplay.p y?contribId=213&sessionId=48&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=213&sessionId=4 8&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The shape of event-to-event fluctuations in heavy-ion collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-218@cern.ch DESCRIPTION:Speakers: GUPTA\, Sourendu (Tata Institute of Fundamental Rese arch)\nWe report results from a new study of lattice QCD with decreased la ttice spacing and using two flavours of light dyanamical quarks at finite temperature and chemical potential through the method of Taylor series exp ansions. With a factor of two in lattice spacings covered to date\, the ap proach to the continuum limit is controlled better. In units of the invers e Compton wavelength of the light pion\, the lattice volumes remain as lar ge as before. We construct ratios of susceptibilities along the freezeout curve\, thus improving upon previous results and allowing us to make more reliable predictions of the results of experiments on the shape of event-t o-event fluctuations of various conserved quantities in heavy-ion collisio ns.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=218&sessionI d=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=218&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Study of jet quenching using photon-jet events in PbPb collisions at 2.76 TeV with CMS DTSTART;VALUE=DATE-TIME:20120814T181500Z DTEND;VALUE=DATE-TIME:20120814T183500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-219@cern.ch DESCRIPTION:Speakers: LAI\, Yue Shi (Massachusetts Inst. of Technology (US ))\nThe first measurement of the transverse momentum (pT) imbalance of iso lated-photon+jet pairs in relativistic heavy ion collisions is reported. T he analysis uses data from PbPb collisions at a center-of-mass energy of 2 .76 TeV per nucleon pair and corresponding to an integrated luminosity of 150/ub recorded by the CMS experiment at the LHC in 2011. For events conta ining an isolated photon with transverse momentum pT > 60 GeV/c and an ass ociated jet with pT > 30 GeV/c\, the photon–jet pT imbalance is studied as a function of collision centrality and compared to pp data and PYTHIA c alculations at the same center-of-mass energy. Using the pT of the isolate d photon as an estimate of the energy of the associated parton at producti on\, this measurement allows an unbiased characterization of the in-medium parton energy loss.\n\nhttp://indico.cern.ch/contributionDisplay.py?contr ibId=219&sessionId=3&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=219&sessionId=3 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Two-particle correlations on transverse momentum in Au+Au collisio ns at $\\sqrt{s_{NN}}=200$ GeV at STAR. DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-289@cern.ch DESCRIPTION:Speakers: OLDAG\, Elizabeth (UT Austin\, STAR Collaboration)\n Correlations on transverse momentum $p_t$ include important aspects of the six dimensional correlation space ($p_t1\,\\eta_1\,\\phi_1\,p_t2\,\\eta_2 \,\\phi_2$) [1]. Two-particle 2D correlations\, $(p_t1\,p_t2)$\, for mini mum-bias Au+Au collisions at $\\sqrt{s_{NN}}=200$ GeV from STAR show a bro ad peak extending from 0.5-4.0 GeV/c [2]. These correlations are formed f rom all charged particles with $p_t \\geq 0.15$ GeV/c\, $|\\eta| \\leq 1$\ , and $2\\pi$ azimuth. The broad peak is observed in both like- and unlik e-sign charge combinations and same- and away-side relative azimuth angles . Variation of peak positions and widths will be reported as a function of centrality. Interestingly\, the peak in the data for away-side or “bac k-to-back” pairs persists even in more-central collisions\, remaining at approximately the same transverse momentum for like- and unlike-sign pair s at all centralities. The event generator HIJING\,\noften used to model p eripheral heavy ion interactions\, predicts a\nsimilar peak in this moment um range but only when jets are included.\nThe peak position for same-side unlike-sign pairs remains at the same approximate momentum for peripheral to mid-central collisions.\nHowever\, for more-central collisions the sam e-side peak separates into two peaks. The centrality dependence of these data will be compared with that of $p_t$-integral 2D angular correlations [3]. The transverse momentum dependence of the same-side angular correlat ion structures will also be presented. Possible mechanisms for the observe d structures will be discussed and predictions from several models will be presented to test agreement with data.\n\n[1] STAR Collaboration\, J. Ada ms\, et al.\, J. Phys. G 34 799 (2007).\n[2] L. Ray (2010). Workshop on Cr itical Examination of RHIC Paradigms [Online]. Available: http://www.rhip. utexas.edu/projects/Star/paradigms/Ray.ppt [2012\,March 23]\n[3] M Daugher ity (for the STAR Collaboration)\, J. Phys. G: Nucl. Part.Phys. 35 104090 (2008).\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=289&sess ionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=289&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:A Silicon Photomultiplier (SiPM) Based Readout for the sPHENIX Upg rade DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-288@cern.ch DESCRIPTION:Speakers: MANNEL\, Eric (B)\nConceived and constructed over a decade ago\, the PHENIX detector was\ndesigned to discover the Quark-Gluon Plasma (QGP). Following on this discovery\,the PHENIX collaboration has embarked on a number of upgrades to study the QGP properties in detail\, with the next step being a significant overhaul of the PHENIX detector ca lled sPHENIX. sPHENIX includes upgrading the central detector with a compa ct solenoid\, electromagnetic and hadronic calorimetry to study jets produ ced in p+p\, p+A\, and A+A collisions at RHIC. The location of the calorim etry in vicinity of the solenoid requires an optical readout that is compa ct and immune to magnetic fields. For this reason\, the sPHENIX calorimetr y will use a Silicon Photomultiplier(SiPM) based readout system for both t he electromagnetic and hadronic calorimeters. In this presentation\, we pr esent the current design status and performance of the prototype analog re adout for the sPHENIX calorimetry based on SiPMs.\n\nhttp://indico.cern.ch /contributionDisplay.py?contribId=288&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=288&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Constraining the Nuclear Equation of State by Neutron-Star Observa bles DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-4@cern.ch DESCRIPTION:Speakers: Dr. HELL\, Thomas (Technische Universität München) \nRecently\, the mass of the pulsar PSR J1614-2230 has been measured at a one-percent accuracy to be roughly two solar masses. This\, in addition to the statistical analysis of neutron-star radii by Steiner\, Lattimer\, an d Brown lead to tight constraints for the equation of state of dense baryo nic matter inside the neutron star. We combine a realistic phenomenologica l equation of state at low densities with equations of state around nuclea r densities derived both from chiral effective field theories\, on one han d\, and from the Polyakov-loop-extended Nambu--Jona-Lasinio model\, on the other. Our analysis based on the Tolman-Oppenheimer-Volkoff equation stro ngly supports an equation of state of ordinary nuclear matter. This means\ , that there is no need to include exotic matter in order to stabilize a t wo-solar mass neutron star. Furthermore\, with these constraints we draw c onclusions for the QCD phase diagram.\n\nhttp://indico.cern.ch/contributio nDisplay.py?contribId=4&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=4&sessionId=37& confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Study of $b\\bar{b}$ production using correlated like-sign dimuons at PHENIX DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-281@cern.ch DESCRIPTION:Speakers: PATEL\, Laura ()\nProduction of open bottom (B) meso ns is an important tool to probe the hot and dense matter created from nuc leus-nucleus collisions at the Relativistic Heavy Ion Collider (RHIC). In the mass region between 4.5 and 12 GeV\, the only source of correlated lik e-sign dimuons will come from the semileptonic decay of B meson pairs. The number of correlated like-sign dimuons due to neutral B meson oscillation is directly related to the total number of open bottom meson pairs and th us can provide a way of constraining the open bottom contribution to the d imuon continuum in the high mass region. \n\nTo establish this new analysi s method\, correlated like-sign dimuons from pairs of B mesons of $\\sim$6 .3 pb$^{-1}$ data from p+p collisions at $\\sqrt{s}$ = 500 GeV within the PHENIX muon arms acceptance (1.2 \n\nhttp://indico.cern.ch/contributionDis play.py?contribId=281&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=281&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Beam energy and centrality dependence of the statistical moments o f the net-charge multiplicity distribution in Au+Au collisions at STAR DTSTART;VALUE=DATE-TIME:20120817T205000Z DTEND;VALUE=DATE-TIME:20120817T211000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-280@cern.ch DESCRIPTION:Speakers: MCDONALD\, Daniel (R)\nIn part to search for a possi ble critical point (CP) in the phase\ndiagram of hot nuclear matter\, a be am energy scan was performed at\nthe Relativistic Heavy-Ion Collider at Br ookhaven National \nLaboratory. The STAR experiment collected significant Au+Au data\nsets at beam energies\, $\\sqrt{\\rm s_{\\rm NN}}$\, of 7.7\, 11.5\, 19.6\, \n27\, 39\, 62.4 and 200 GeV. Lattice and phenomenological c alculations \nsuggest that the presence of a CP might result in divergence s of the\nthermodynamic susceptibilities and correlation lengths [1\,2]. T he \nstatistical moments of the multiplicity distributions of particles \n reflecting conserved quantities\, {\\it e.g.} net-charge and \nnet-strange ness\, are expected to depend sensitively on these correlation lengths\, m aking them attractive tools for the search of \na possible critical point. \n\nIn this talk\, the centrality and beam energy dependence of the\nstati stical moments of the net-charge multiplicity distributions will\nbe prese nted. The observables studied include the lowest four\nstatistical moments (mean\, variance\, skewness\, kurtosis)\, products of\nthese moments\, an d the intensive normalized cumulants [2]. The\nmeasured moments of the net -Kaon and total-pion multiplicity\ndistributions will also be presented. T hese will be compared to the\npredictions from approaches lacking critical behavior\, such as the\nHadron Resonance Gas model [3] and Poisson statis tics.\n\nReferences\n[1] M. Cheng {\\it et al.}\, Phys. Rev. D 79\, 074505 (2009).\n[2] C. Athanasiou {\\it et al.}\, Phys. Rev. D 82\, 074008 (2010 )\,\nM. Stephanov\, Phys. Rev. Lett. 107\, 052301 (2011).\n[3] F. Karsch a nd K. Redlich\, Phys. Lett. B 695\, 136 (2011).\n\nhttp://indico.cern.ch/c ontributionDisplay.py?contribId=280&sessionId=57&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=280&sessionId=5 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:PHENIX $J/\\psi$ measurement in Au+Au collisions at $\\sqrt{s_{NN} }=$ 39 and 62 GeV DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-283@cern.ch DESCRIPTION:Speakers: Mr. SEN\, Abhisek (Georgia State University)\n$J/\\p si$ production is considered as one of the very important probes for study ing the properties of quark-gluon plasma (QGP). PHENIX observed a large su ppression of $J/\\psi$ production in Au+Au collisions at $\\sqrt{s_{NN}}=$ 200 GeV in comparison with binary collision scaled p+p collisions. The le vel of this suppression is similar to that observed in other energies in C ERN-SPS and LHC. PHENIX also took $J/\\psi$ data from Au+Au collisions at $\\sqrt{s_{NN}}=$ 39 and 62 GeV in 2010. This data allow us to explore th e energy dependent suppression level in order to disentangle the important contributing factors of $J/\\psi$ production. We will present the $j/\\ps i$ $R_{AA}$ results at 39\, 62.4 GeV in comparison with our previously pub lished 200 GeV results.\n\nhttp://indico.cern.ch/contributionDisplay.py?co ntribId=283&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=283&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Models of the 3-D Initial Hydro State: The "Club Sandwich" Picture DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-282@cern.ch DESCRIPTION:Speakers: Dr. STANKUS\, Paul (Oak Ridge National Lab)\nThe lar ge majority of observations made of high-energy heavy-ion collisions at RH IC and LHC have been within a narrow range at mid-rapidity. These have be en greatly informative\, of course\; but they've provided a window only on to a central "slice" of the created medium\, leaving the full 3-D picture of the collision as a relatively unexplored frontier. How the initially l ocally thermalized hydro state comes into being across three dimensions in volves fundamentally new QCD physics\, which we can hope to diagnose via m easurements spanning wide ranges of rapidity and correlations across them. \n\nHere we present and discuss the so-called "Club Sandwich picture"\, an inclusive framework for describing and parameterizing 3-D initial energ y density profiles\, not based on any particular stopping mechanism but on ly on the general considerations of energy and momentum conservation and c ausality. It is proposed\, that frameworks of this type can serve as a us eful bridge between final-state observations of energy/momentum flow and n ew physics models for the initial medium creation mechanisms.\n\nhttp://in dico.cern.ch/contributionDisplay.py?contribId=282&sessionId=37&confId=1810 55 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=282&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Dynamical freeze-out in event-by-event hydrodynamics DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-284@cern.ch DESCRIPTION:Speakers: HUOVINEN\, Pasi (Johann Wolfgang Goethe-Universität )\nIn hydrodynamical modeling of the ultrarelativistic heavy-ion collision s the freeze-out is typically performed at a constant temperature. In this work we introduce a dynamical freeze-out criterion\, which compares the h ydrodynamical expansion rate with the pion scattering rate [1]. Previous s tudies [2] have shown that differences between constant temperature and dy namical freeze-out criteria are small in the transverse momentum spectra\, but the effect on flow anisotropies has not yet been studied. Recently ma ny calculations have been done using event-by-event hydrodynamics\, in whi ch case the expansion rate does not necessarily behave as nicely as in the case of smooth initial conditions. Thus it is interesting to check how th e dynamical freeze-out changes hadron distributions with respect to the co nstant temperature freeze-out.\n\nIn this contribution we present hadron s pectra and elliptic and triangular flow calculated using (2+1)-dimensional ideal hydrodynamics\, and show the differences between constant temperatu re and dynamical freeze-out criteria. First we discuss the systematics of the dynamical freeze-out\, and for simplicity these calculations have been performed using smooth initial states. Finally dynamical\nfreeze-out cond ition is applied to event-by-event calculations to evaluate $v_2$ and $v_3 $. We find that the differences caused by different freeze-out criteria ar e small in all studied cases.\n\n[1] C. M. Hung and E. V. Shuryak\, Phys. Rev. C 57\, 1891 (1998).\n[2] K. J. Eskola\, H. Niemi and P. V. Ruuskanen\ , Phys. Rev. C 77\, 044907 (2008).\n\nhttp://indico.cern.ch/contributionDi splay.py?contribId=284&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=284&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Probing Hot and Dense Matter with c and b Measurements with PHENIX VTX Tracker DTSTART;VALUE=DATE-TIME:20120817T190000Z DTEND;VALUE=DATE-TIME:20120817T192000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-286@cern.ch DESCRIPTION:Speakers: Dr. NOUICER\, Rachid (Brookhaven National Laboratory (BNL))\nWell-calibrated penetrating probes are essential for investigatin g the properties of the hot\, dense medium created in high-energy nuclear collisions at RHIC. One such probe are hadrons which carry heavy flavor (c harm and bottom quarks). They are a powerful tool for studying the medium because they are generated early in the reaction and subsequently propagat e through the created matter.\n\nTwo very striking results have already be en seen for open heavy flavor from the PHENIX experiment via the measureme nt of electrons from semi-leptonic decays of hadrons carrying charm or bot tom quarks. First\, heavy mesons\, despite their large mass\, exhibit a s uppression at high transverse momentum compared to that expected from p+p interactions. This suppression is found to be similar to that of light mes ons which implies a substantial energy loss of fast heavy quarks while tra versing the medium. Secondly\, an elliptic flow is observed for heavy meso ns which is comparable to that of light mesons like pions. This imply that the same heavy quarks are in fact sensitive to the pressure gradients dri ving hydrodynamic flow—giving new insight into the strongly coupled natu re of the QGP fluid at these temperatures. In these early results\, PHENIX was not able to distinguish electrons from c and b independently. In orde r to understand these medium effects in more detail it is imperative to di rectly measure the nuclear modification and the flow of c and b separately .\n\nWith the addition of the silicon vertex tracker\, VTX\, to PHENIX the se direct measurements are now possible. We will present the latest PHENIX measurements of single electrons from beauty and charm decays\, emphasizi ng the flow\, v2\, and nuclear modification factor\, RAA\, including the l atest progress with the VTX.\n\nhttp://indico.cern.ch/contributionDisplay. py?contribId=286&sessionId=23&confId=181055 LOCATION: Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=286&sessionId=2 3&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Future of LHC Heavy Ion Experiments DTSTART;VALUE=DATE-TIME:20120818T125500Z DTEND;VALUE=DATE-TIME:20120818T131500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-670@cern.ch DESCRIPTION:Speakers: APPELSHAEUSER\, Harald (Johann-Wolfgang-Goethe Univ. (DE))\nhttp://indico.cern.ch/contributionDisplay.py?contribId=670&session Id=28&confId=181055 LOCATION:Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=670&sessionId=2 8&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Incident Energy Dependence of Transverse Momentum Correlations in Au+Au collisions at $\\sqrt{s_{NN}}$ = 7.7 -­ 200 GeV in STAR DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-263@cern.ch DESCRIPTION:Speakers: NOVAK\, John (M)\nIt has been proposed that one sign al of the critical point could be a non-­monotonic change in the value of transverse momentum ( $p_t$ ) correlations as a function of centrality an d/or incident energy [1]. Accordingly\, we present results for two-­parti cle $p_t$ correlations as a function of event centrality for Au+Au collisi ons at\n$\\sqrt{s_{NN}}$ = 7.7\, 11.5\, 19.6\, 27\, 39\, 62.4 and 200 GeV at RHIC\, extending our previous work [2] to lower incident energies. The $p_t$ correlations will be calculated as a function of centrality and coll ision energy. We will study the energy dependence of the square root of th e correlations ( $\\sqrt{\\Delta p_{t\,i}\\Delta p_{t\,j}}$ ) divided by t he event-­‐wise average transverse momentum per event ( $>$ ). These re sults will be compared to measurements from other experiments as well as U rQMD model calculations.\n[1] H. Heiselberg\, Phy. Rep. 351\, 161 (2001)\n [2] STAR: Phys. Rev. C 72\, 044902 (2005)\n[3] ALICE data: Stefan Heckel\, Quark Matter 2011\n[4] D. Adamova et al. [CERES Collaboration]\, Nucl. Ph ys. A727\, 97 (2003)\n\nhttp://indico.cern.ch/contributionDisplay.py?contr ibId=263&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=263&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The spectrum of quantum fluctuations and space-time evolution in t he little bang DTSTART;VALUE=DATE-TIME:20120815T160000Z DTEND;VALUE=DATE-TIME:20120815T162000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-261@cern.ch DESCRIPTION:Speakers: VENUGOPALAN\, Raju (Brookhaven National Laboratory)\ nWe outline significant recent progress in a program to include quantum co rrections to the evolution of the classical color fields produced in high- energy ultra-relativistic heavy ion collisions. Previous work in this dire ction for a scalar \\phi^4 theory [1] has now been extended to QCD. Leadin g contributions from unstable quantum modes can be resumed to all loop ord ers and expressed in terms of a gauge invariant spectrum of initial quantu m fluctuations\, which has been computed recently [2]. These fluctuations play a key role in decoherence of the high occupancy fields\, and in thei r possible isotropization and flow\, and in the matching of this initial d ynamics to hydrodynamic flow\, thereby potentially eliminating a big sourc e of uncertainty in hydrodynamic simulations. We report on progress in the 3+1-D numerical computations implementing these pre-equilibrium dynamics. \n\n[1] K.~Dusling\, T.~Epelbaum\, F.~Gelis and R.~Venugopalan\,\n%``Role of quantum fluctuations in a system with strong fields: Onset of hydrodyna mical flow\,''\n Nucl.\\ Phys.\\ A {\\bf 850}\, 69 (2011)\; T.~ Epelbaum and F. Gelis\,\n %``Role of quantum fluctuations in a system with strong fields: Spectral properties and Thermalization\,''\n Nucl.\\ Phys.\\ A {\ \bf 872}\, 210 (2011).\n\n[2] K.~Dusling\, F.~Gelis and R.~Venugopalan\, % ``The initial spectrum of fluctuations in the little bang\,''\n Nucl.\\ P hys.\\ A {\\bf 872}\, 161 (2011).\n\nhttp://indico.cern.ch/contributionDis play.py?contribId=261&sessionId=54&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=261&sessionId=5 4&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The RICH detector for the Compressed Baryonic Matter experiment DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-260@cern.ch DESCRIPTION:Speakers: KOPFER\, Jan (Universität Wuppertal)\nThe Compresse d Baryonic Matter experiment\, CBM\, is being built at the Facility for An tiproton and Ion Research\, FAIR\, at Darmstadt. The goal is to investigat e the QCD phase diagram in particular in the region of high net baryonic d ensity\, using heavy ion collisions in a fixed target experiment at beam e nergies ranging from 8 to 45 GeV/nucleon. The high beam intensity and -qua lity of the SIS300 accelerator (SIS100 in the first step)\, together with a detector concept optimized for high event rate capability\, allow to ach ieve exceptional high luminosities (reaction rates up to 10 MHz) and to st udy in particular rare probes.\nOf particular interest are dilepton probes originating from decays of charmonium and light vector mesons\, such as r ho/omega -> e+ e-/ mu+ mu-. These dilepton probes do not interact hadronic ally with the dense medium and as such allow to probe the early\, high den sity phase of the fireball evolution.\nIn the CBM detector setup\, a Ring Imaging Cherenkov Detector (RICH) will be used to provide clean separation of electrons from pions\, and together with additional layers of Transiti on Radiation Detectors (TRD) to achieve pion suppression factors up to 4 o rders of magnitude. The RICH detector will consist of a CO2 gas radiator v olume\, a spherical focusing mirror\, and multi-anode PMTs (ca 55k individ ual channels) for detection of Cherenkov photons. A major step in the dete ctor development was the test of a quasi full-scale prototype of the RICH detector at CERN in autumn 2011. Valuable information on the ring image re solution\, the photon statistics\, the MAPMT readout\, and the overall ope ration was obtained.\nWe report on the design and status of the RICH detec tor development\, and in particular on the beam time results obtained with the RICH prototype.\n\nhttp://indico.cern.ch/contributionDisplay.py?contr ibId=260&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=260&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Study of identified particle higher harmonics azimuthal anisotropy in 200GeV Au+Au collisions at RHIC-PHENIX experiment DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-267@cern.ch DESCRIPTION:Speakers: MIZUNO\, Sanshiro for the PHENIX experiments (Univer sity of Tsukuba\, RIKEN (JP))\nAzimuthal anisotropy and particle species d ependence of transverse momentum distribution have been studied actively b ecause they reveal information about the QGP generated in high energy heav y ion collisions.\nFrom the study of elliptic event anisotropy v_{2}\, we have understood that azimuthal anisotropy is generated by initial particip ant geometry\, with a role for the QGP property $\\eta$/s (the ratio of sh ear viscosity($\\eta$) to entropy density(s)).\nIn recent years\, higher h armonics azimuthal anisotropies v_{n$\\ge$3} are in focus because they are expected to be more sensitive to initial participant geometry and $\\eta$ /s than will be v_{2}.\n\nThe observed similarities and differences of ide ntified particles v_{3}\, v_{4} and v_{2} will be shown and discussed.\nTh e freeze-parameters such as freeze-out geometry and expansion velocity as well as temperature at the freeze-out will also be extracted based on the Blast-Wave model and compared with other measurements like HBT and spectra .\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=267&sessionId= 37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=267&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Beam Energy Dependence of Strange Hadron Production from STAR at R HIC DTSTART;VALUE=DATE-TIME:20120816T190000Z DTEND;VALUE=DATE-TIME:20120816T192000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-266@cern.ch DESCRIPTION:Speakers: Dr. ZHANG\, Xiaoping (Tsinghua University)\nStrange hadron production is sensitive to parton dynamics in nucleus-nucleus colli sions. In particular\, the strange quark production rate and its subsequen t evolution in the dense partonic medium depend on the beam energy and the net baryon density. We will present STAR measurements of $K^{0}_{s}$\, $K ^{\\pm}$\, $\\phi$\, $\\Lambda$\, $\\Xi$\, and $\\Omega$ at mid-rapidity f rom Au+Au collisions at $\\sqrt{s_{NN}}$ = 7.7\, 11.5\, 19.6\, 27\, and 39 GeV from the RHIC Beam Energy Scan (BES) program. We will report the stra ngeness enhancement through the ratios $K/\\pi$\, $\\Lambda/\\pi$\, $\\phi /\\pi$ and $\\Xi/\\pi$\, and strangeness equilibration as a function of be am energy at RHIC. Nuclear modification factors and baryon to meson ratios will be discussed to understand recombination and parton energy loss mech anisms. Further\, the particle ratios will be compared to ultra relativist ic quantum molecular dynamics\, hadron string dynamics\, statistical hadro nization models and SPS measurements. Implications on partonic vs. hadroni c dynamics at low beam energies will also be discussed.\n\nhttp://indico.c ern.ch/contributionDisplay.py?contribId=266&sessionId=15&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=266&sessionId=1 5&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Fully dynamic simulations of heavy ion collisions in a pQCD-based partonic transport model DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-265@cern.ch DESCRIPTION:Speakers: FOCHLER\, Oliver (Goethe-Universität Frankfurt)\nWe present fully dynamic simulations of central and non-central heavy ion co llisions at LHC and at RHIC energies within the perturbative QCD-based par tonic transport model BAMPS (Boltzmann Approach to Multi-Parton Scattering s). We focus on the simultaneous investigation of bulk properties\, such a s elliptic flow\, viscosity and thermalization\, and of high-pT observable s\, such as jet quenching.\n\nThe model incorporates binary interactions o f gluons and quarks based on pQCD cross sections in small angle approximat ion as well as 23 processes based on the Gunion-Bertsch matrix element. We discuss symmetry properties of the radiative Gunion-Bertsch matrix elemen t and compare to the exact result by Berends et al. The implications on th e interaction rates and the dynamics of the medium are explored. We invest igate the thermalization and viscosity of the medium\, the elliptic flow a s well as the nuclear modification of high-pT particles in Au+Au collision s at RHIC energies and in Pb+Pb collisions at LHC energies.\n\nhttp://indi co.cern.ch/contributionDisplay.py?contribId=265&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=265&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Influence of a realistic medium description including fluctuations on heavy quark observables DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-264@cern.ch DESCRIPTION:Speakers: Dr. NAHRGANG\, Marlene ()\nStrong jet quenching and high-pT hadron suppression as observed in relativistic heavy-ion collision s are striking experimental signatures for the formation of a deconfined Q CD plasma\, in which partons suffer from medium-induced energy loss. In pa rticular\, heavy quarks represent key probes for revealing the properties of the produced matter.\n\nIn this talk\, we discuss the consequences of a realistic medium description with fluctuating initial conditions on heavy -quark observables. For this purpose\, we combine our Monte-Carlo approach to heavy-quark in-medium propagation MC@sHQ [1] with the full 3+1 dimensi onal fluid dynamic expansion from EPOS [2]. This allows for a consistent t reatment of both the heavy-quark production and the collisional and radiat ive processes leading to the in-medium energy loss of heavy quarks. On an event-by-event basis\, we report on RAA and v2 of D and B mesons for RHIC and LHC energies and confront our results with recent experimental observa tions. While with a simplified medium description [3] we find a too strong quenching for LHC conditions\, the discrepancy can be resolved with a med ium with initial fluctuations. Moreover\, in EPOS a lattice QCD equation o f state is used. This allows us to study the nature of the effective degre es of freedom present in the vicinity of the crossover transition\, cf. [4 ]\, because a proportion of hadronic degrees of freedom above Tc would red uce the energy loss of heavy quarks.\n\n[1] P. B. Gossiaux and J. Aichelin \, Phys. Rev. C 78 (2008) 014904\n[2] K. Werner et al.\, arXiv:1203.5704\, \n[3] P. F. Kolb and U. W. Heinz\, In *Hwa\, R.C. (ed.) et al.: Quark gluo n plasma* 634-714\n[4] C. Ratti et al.\, Phys. Rev. D 85 (2012) 014004\n\n http://indico.cern.ch/contributionDisplay.py?contribId=264&sessionId=37&co nfId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=264&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Low mass di-electron production in Au+Au collisions at $\\sqrt{s_{ _{NN}}} = 19.6$ GeV at STAR DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-269@cern.ch DESCRIPTION:Speakers: Dr. BINGCHU\, Huang (Brookhaven National Lab)\nAn en hancement of low-mass di-electron production which is compared to expected yields from known hadron sources was observed by the CERES experiment at CERN SPS in 158 A GeV central Pb+Au collisions\n(sqrt(s)=17.3GeV). More re cently\, NA60 reported their di-muon\nmeasurements in 158 A GeV In+In coll isions. The enhancement of di-muon at $M_{\\mu\\mu} \n\nhttp://indico.cern .ch/contributionDisplay.py?contribId=269&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=269&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Di-electron differential cross section in Au+Au collisions at diff erent beam energies at STAR DTSTART;VALUE=DATE-TIME:20120815T131000Z DTEND;VALUE=DATE-TIME:20120815T133000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-268@cern.ch DESCRIPTION:Speakers: Dr. BINGCHU\, Huang (Brookhaven National Lab)\nDi-le ptons serve as clean and bulk penetrating probes to study\nthe properties of the strongly interacting hot and dense medium\ncreated in heavy ion col lisions. They are produced in all stages\nof the heavy-ion collisions and are not affected by strong\ninteractions\, hence can probe the entire evol ution of the\ncollision. Di-lepton production in the low mass range\n($M_{ ll}\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=268&sessionI d=10&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=268&sessionId=1 0&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Systematic Monte-Carlo studies of dijets at the LHC and RHIC DTSTART;VALUE=DATE-TIME:20120816T180000Z DTEND;VALUE=DATE-TIME:20120816T182000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-59@cern.ch DESCRIPTION:Speakers: COLEMAN-SMITH\, Christopher (Duke Physics)\nRecent r esults from Pb+Pb collisions at the LHC have shown evidence of dramatic me dium modification of di-jets. Although asymmetric di-jets are also seen in p+p collisions\, di-jets with a large energy asymmetry are found much mor e often in Pb+Pb collisions. E.g.\, events with a 200 GeV leading jet and a 80 GeV subleading jet were frequently observed. The increase in the aver age energy asymmetry is believed to be caused by in-medium energy loss tha t arises from the interaction of the colored jet constituents with the ho t deconfined matter formed is the collision. The modified di-jets provide a means to study the nature of the high energy interactions of this deconf ined matter. \n\nThe observed di-jet suppression has been quantified in te rms of the asymmetry A_j\, the ratio of the difference between the two jet energies to their sum. It is not a priori clear that this is the observab le best suited to extract information about the modification of the di-jet s and the nature of their interactions with the deconfined medium. Underst anding the sensitivity of di-jet observables to properties of the deconfin ed medium and to experimental factors is vital if they are to become a use ful tool for jet tomography of hot QCD matter.\n\nWe have examined the res ponse of the di-jet asymmetry and other di-jet observables to variations i n the jet modification mechanism and to variations of the observables. We present a systematic study of di-jet suppression at RHIC and the LHC using the VNI/BMS parton cascade. VNI/BMS is a jet+medium Monte-Carlo code whi ch provides a controllable testbed with sufficient complexity to model jet modification without confounding results with fluctuations from hydrodyna mics and hadronization. \n\nWe consider the medium modification of the d i-jet asymmetry A_j and the energy distribution within the di-jets (jet sh ape). Di-jets are examined under the modification of: the jet transport c oefficient qhat\; the path length of leading and sub-leading jets\; cuts o n the jet energy distributions\; jet cone angle and the jet-medium interac tion mechanism and the strong coupling constant. We find that\, while the jet asymmetry and jet shape are similarly sensitive to the in-medium path length\, the jet-shape is more sensitive to the nature of the interaction with the medium and the value of q-hat than the jet asymmetry.\n\nhttp:// indico.cern.ch/contributionDisplay.py?contribId=59&sessionId=17&confId=181 055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=59&sessionId=17 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Thermal meson properties and chiral symmetry: recent advances. DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-58@cern.ch DESCRIPTION:Speakers: Prof. GOMEZ NICOLA\, Angel (Universidad Complutense Madrid)\nI will review recent and ongoing work on thermal meson properties relevant for the hadron gas regime in Relativistic Heavy Ion Collisions. These include transport coefficients\, chemical nonequilibrium\, susceptib ilities\, isospin breaking and different aspects on chiral symmetry restor ation and the QCD transition. The basic framework is the use of Chiral Eff ective Lagrangians which ensure the model independency of the low-energy and low-temperature regimes and allows to include interactions consistentl y. This is combined with unitarity when an accurate analytical description of particle scattering is needed\, as in the case of resonance studies\, virial analysis and  transport coefficients\, for temperatures and ene rgies where deviations from Chiral Perturbation Theory are significant. O ur scheme provides an adequate phenomenological description for several q uantities. The shear viscosity is compatible with the KSS bound and recen t data on elliptic flow\, bulk viscosity correlation with the trace anomal y is established without appealing to the spectral function profile and th e electrical conductivity is consistent with the low-energy photon spectru m. At the same time\, this framework helps to understand theoretical aspec ts such as the role of scalar resonances and degeneration of partners in chiral restoration or the effects of meson interactions in a possible win dow between chemical and thermal freeze-out. We will pay also attention t o the connection with lattice results\, particularly in the analysis of co nnected and disconnected scalar susceptibilities\, whose quark mass and te mperature behaviour we can establish rigorously from our isospin-breaking analysis\, providing then a useful benchmark for the continuum limit.\n \n Some related references:\n\n- D.Fernandez-Fraile and A.Gomez Nicola\, ``The Electrical conductivity of a pion gas''\, Phys.Rev. D {\\bf 73}\, 0 45025 (2006)\n [arXiv:hep-ph/0512283].\n \n- D.Fernandez-Fraile\, A.Gom ez Nicola and E.T.Herruzo\, ``Pion scattering poles and chiral symmetry re storation''\, Phys.Rev. D {\\bf 76}\, 085020 (2007)\n [arXiv:0707.1424 [h ep-ph]].\n \n- D.Fernandez-Fraile and A.Gomez Nicola\, ``Transport coeffi cients and resonances for a meson gas in Chiral\n Perturbation Theory''\, Eur.Phys.J. C {\\bf 62}\, 37 (2009)\n [arXiv:0902.4829 [hep-ph]].\n \n- D.Fernandez-Fraile and A.Gomez Nicola\, ``Bulk viscosity and the conforma l anomaly in the pion gas''\, Phys.Rev.Lett. {\\bf 102}\, 121601 (2009)\n [arXiv:0809.4663 [hep-ph]].\n \n- D.Fernandez-Fraile and A.Gomez Nicola\ , ``Chemical nonequilibrium for interacting bosons: applications to the pi on gas''\, Phys.Rev. D {\\bf 80}\, 056003 (2009)\n [arXiv:0903.0982 [hep- ph]].\n \n- A.Gomez Nicola and R.Torres Andres\, ``Isospin Breaking and c hiral symmetry restoration''\, Phys.Rev. D {\\bf 83}\, 076005 (2011)\n [ arXiv:1101.5362 [hep-ph]].\n\nhttp://indico.cern.ch/contributionDisplay.py ?contribId=58&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=58&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Shear Viscosity in NJL-type Models DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-54@cern.ch DESCRIPTION:Speakers: LANG\, Robert (TUM)\nCollision experiments with heav y ions at RHIC and CERN help to explore the nature of the deconfined quark -gluon phase. The matter created in such collisions behaves as an almost-p erfect fluid indicated by very small dissipative effects. We use the two-f lavor NJL model to approximate the QCD physics at high temperatures $T\\gt rsim 200\\\,\\text{MeV}$. A large-$N_c$ expansion is applied to include me sonic fluctuations in the fundamental quark sector. We discuss the impact of this expansion to the gap equation and the dynamics leading to a finite shear viscosity of the quarks.\n\nhttp://indico.cern.ch/contributionDispl ay.py?contribId=54&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=54&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Directed flow at midrapidity at the LHC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-57@cern.ch DESCRIPTION:Speakers: RETINSKAYA\, Ekaterina (IPhT Saclay)\nWe present the first extraction of the recently-proposed rapidity-even directed flow obs ervable v1\, obtained from an analysis of published two-particle correlati on data from the ALICE Collaboration. An accounting of the correlation due to the conservation of transverse momentum restores the factorization see n in all other Fourier harmonics and thus indicates that the remaining cor relation gives a reliable measurement of directed flow. We also present re sults from the first viscous hydrodynamic calculation of directed flow\, a nd show that it is less sensitive to viscosity than higher harmonics. This allows for a direct extraction of the dipole asymmetry of the initial sta te\, providing a strict constraint on the non-equilibrium dynamics of the early-time system.\n(Reference: arXiv:1203.0931)\n\nhttp://indico.cern.ch/ contributionDisplay.py?contribId=57&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=57&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Open heavy flavor and J/psi at RHIC and LHC within a transport mod el DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-51@cern.ch DESCRIPTION:Speakers: UPHOFF\, Jan (Goethe University Frankfurt)\nThe prod uction and space-time evolution of heavy quarks and J/psi in the quark glu on plasma is studied within the partonic transport model Boltzmann Approac h to MultiParton Scatterings (BAMPS). An updated version of BAMPS is prese nted which allows interactions among all partons: gluons\, light quarks an d heavy quarks. Heavy quarks\, in particular\, interact with the rest of t he medium via binary and radiative scatterings with a running coupling and a more precise Debye screening which is derived from hard thermal loop ca lculations. We compare our results of the elliptic flow and nuclear modifi cation factor not only to experimental data of heavy flavor electrons at R HIC\, but also to LHC data of heavy flavor electrons\, muons\, D mesons\, and non-prompt J/psi. The latter two are in particular sensitive on the ma ss difference of charm and bottom quarks. Where no data is available yet\, we make predictions for those observables. Furthermore\, results on J/psi suppression are reported for central and non-central collisions\, taking cold nuclear matter effects and the dissociation as well as regeneration o f J/psi in the quark-gluon plasma into account.\n\nhttp://indico.cern.ch/c ontributionDisplay.py?contribId=51&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=51&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Emission of Low Momentum Particles at Large Angles from Jet DTSTART;VALUE=DATE-TIME:20120818T142000Z DTEND;VALUE=DATE-TIME:20120818T143000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-62@cern.ch DESCRIPTION:Speakers: Mr. TACHIBANA\, Yasuki (Department of Physics\, The University of Tokyo)\nHot and dense QCD matter\, namely the quark gluon pl asma\, is created in high energy heavy ion collisions. High energy partons are also created through initial hard scatterings and have to traverse th e QGP medium. These energetic partons are subject to lose their energy due to strong interactions with the medium. So jets in heavy ion collisions a re expected to give information about the stopping power of the QGP.\nWhil e jets traverse the QGP medium\, they could induce collective flow in the fluid by depositing energy and momentum. Thus the space-time evolution of the QGP fluid would be affected when jets pass through the medium. In fact \, the CMS Collaboration observed a lot of low momentum hadrons at large a ngles from a quenched jet [1]. These low momentum hadrons are intimately r elated with jet energy loss since the total momentum of these hadrons toge ther with the quenched jet balances the momentum of the other jet propagat ing in the opposite direction. The CMS result can be interpreted as manife station of a wake of the QGP fluid by jet energy loss.\nIn this study\, we construct a model to describe the dynamics of QGP fluid and jets simulta- neously. We model a source term in the relativistic hydrodynamic equation s which originates from the energy and momentum deposited from traversing jets. Without linearization we solve these non-linear hydrodynamic equatio ns numerically in fully three dimensional space and describe the dynamics of the background QGP medium.\nA Mach cone like structure and a vortex rin g appear behind the jet traversing a uniform medium. When a pair of jets g o through a fluid expanding three dimensionally\, the Mach cone like struc ture is distorted by radial flow. As a result\, low momentum particles fro m the medium are preferentially emitted at large angles from the jet axis. The result exhibits the same trend as the one observed by the CMS Collabo ration.\n\nReferences\n[1]S. Chatrchyan et al. [CMS Collaboration]\, Phys. Rev. C 84\, 024906 (2011)\; C. Roland\, J. Phys. G 38\, 124020 (2011) .\n [2]Y. Tachibana\, “A Relativistic Hydrodynamic Model with Source Terms a nd its Application to Heavy Ion Collisions\,” Master thesis\, the Univ. of Tokyo (2012).\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId =62&sessionId=29&confId=181055 LOCATION:Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=62&sessionId=29 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Heavy quark evolution and flow in hot and dense medium DTSTART;VALUE=DATE-TIME:20120817T192000Z DTEND;VALUE=DATE-TIME:20120817T194000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-53@cern.ch DESCRIPTION:Speakers: CAO\, Shanshan (Duke University)\nHeavy quarks serve as valuable probes of the transport properties of the quark-gluon plasma created in relativistic heavy-ion collisions. Within the framework of a La ngevin approach\, coupled to a realistic 3D hydrodynamic calculation of th e medium\, we study the heavy quark energy loss due to quasi-elastic multi ple scatterings. We extend this algorithm to include medium-induced gluon radiation in hot and dense nuclear matter. Within this new and improved ap proach\, we perform a detailed analysis of various ingredients affecting t he final heavy flavor spectra and elliptic flow\, such as the coupling str ength between heavy quarks and the medium\, the medium's geometric anisotr opy and its flow profile\, and the relative contributions from charm and b ottom quarks. We demonstrate the consistency between these properties and our previous study of the thermalization behavior of heavy quarks inside t he QGP. We also present simulations of heavy flavor quenching and elliptic flow\, including both collisional and radiative energy loss\, for RHIC an d LHC experiments.\n\nhttp://indico.cern.ch/contributionDisplay.py?contrib Id=53&sessionId=23&confId=181055 LOCATION: Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=53&sessionId=23 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Anisotropic flow in event-by-event ideal hydrodynamic simulations of √sNN=200 GeV Au+Au collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-52@cern.ch DESCRIPTION:Speakers: Dr. GRASSI\, Frederique (Universidade de Sao Paulo\, Brazil)\nWe calculate flow observables with the NeXSPheRIO ideal hydrodyn amic model and make the first comparison to the complete set of mid- rap idity flow measurements made by the PHENIX collaboration in top energy Au +Au collisions. A simultaneous calculation of v2\, v3\, v4\, and the firs t event-by-event calculation of quadrangular flow defined with respect t o the v2 event plane (v4{psi2}) gives good agreement with measured values\ , including the dependence on both transverse momentum and centrality. Thi s provides confirmation that the collision system is indeed well described as a quark-gluon plasma with an extremely small viscosity\, and that corr elations are dominantly generated from collective effects. In addition we present a prediction for v5. \n\n\nReference: arXiv:1203.2882\n\nhttp://in dico.cern.ch/contributionDisplay.py?contribId=52&sessionId=37&confId=18105 5 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=52&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Coupling dependence of jet quenching in hot strongly-coupled gauge theories DTSTART;VALUE=DATE-TIME:20120816T184000Z DTEND;VALUE=DATE-TIME:20120816T190000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-537@cern.ch DESCRIPTION:Speakers: ARNOLD\, Peter (University of Virginia)\nPrevious to p-down studies of jet stopping in strongly-coupled QCD-like plasmas with g ravity duals have been in the infinite 't Hooft coupling limit $\\lambda \ \to \\infty$. They have found that\, though a wide range of jet stopping distances are possible depending on initial conditions\, the maximum jet s topping distance $\\ell_{\\rm max}$ scales with energy as $E^{1/3}$ at lar ge energy. But it has always been unclear whether the large-coupling and high-energy limits commute. We use the string $\\alpha'$ expansion in AdS -CFT to study the corrections to the $\\lambda{=}\\infty$ result in powers of $1/\\lambda$ by assessing the effects of all higher-derivative correct ions to the supergravity action for the gravity dual. We find that someti mes $\\lambda=\\infty$ results can be trusted for jet stopping\, but other times the expansion in $1/\\lambda$ breaks down.\n\nhttp://indico.cern.ch /contributionDisplay.py?contribId=537&sessionId=18&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=537&sessionId=1 8&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:"Chemical" composition of the Quark-Gluon Plasma in relativistic h eavy-ion collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-534@cern.ch DESCRIPTION:Speakers: Prof. GRECO\, Vincenzo (University of Catania)\nWe s tudy the evolution of the quark-gluon composition of the plasma created in ultra-Relativistic-Heavy Ion Collisions (uRHIC's) employing a partonic tr ansport theory that includes both elastic and inelastic collisions plus a mean fields dymanics associated to the widely used quasi-particle model. T he latter\, able to describe lattice QCD thermodynamics\, implies a "chemi cal" equilibrium ratio between quarks and gluons strongly increasing as T -> Tc\, the phase transition temperature. Accordingly we see in realistic simulations of uRHIC's a rapid evolution from a gluon dominated initial st ate to a quark dominated plasma close to Tc. The quark to gluon ratio can be modified by about a factor of 20 in the bulk of the system and appears to be large also in the high pT region.\nWe discuss how this aspect\, ofte n overflown\, can be essential for a quantitative study of several key iss ues in the QGP physics: shear viscosity\, jet quenching\, quarkonia suppre ssion. Furthermore a bulk plasma made by more than 80% of quarks plus anti quarks provides a theoretical basis for hadronization via quark coalescenc e. \nRef. [arXiv:1202.2262]\n\nhttp://indico.cern.ch/contributionDisplay.p y?contribId=534&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=534&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The tunnelling effect and the crossover of deconfinement in FL mod el DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-532@cern.ch DESCRIPTION:Speakers: Dr. SHU\, Song (Faculty of Physics and Electronic Te chnology\, Hubei University\, China)\nWe have discussed the tunnelling eff ect in FL model. The\ntunnelling coefficient is derived in the field confi guration space\nby calculating the transition amplitude using the path int egral at\nSPA and the dilute instanton gas approximation. By studying the\ ntunnelling effect between the two degenerating vacuums at the\ncritical t emperature and chemical potential\, we find that the\nsystem could be deco nfined by tunnelling\, which will change the\nfirst order deconfinement ph ase transition to crossover. The\n$T-\\mu$ phase diagram of deconfinement with both first order phase\ntransition and crossover including CEP is pre sented.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=532&sess ionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=532&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Unraveling Cold Nuclear Matter Effects with the sPHENIX Forward Up grade DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-539@cern.ch DESCRIPTION:Speakers: Prof. RICHARD\, Seto (University of California\, Riv erside)\nStudies of proton (deuteron) - nucleus collisions allow for the d etailed examination of \ncold nuclear matter effects (including gluon satu ration\, initial state parton energy loss\,\nnuclear break up and others)\ , while also providing a crucial baseline for nucleus-nucleus\ncollisions with additional hot quark-gluon plasma effects. The PHENIX experiment is planning\nan ambitious upgrade program referred to as sPHENIX that includ es a mid-rapidity solenoid with full \ncalorimetry coverage. In addition\ , the sPHENIX planning includes extended forward rapidity coverage.\nIn th is presentation\, we detail two example physics observables at forward rap idity that are key\nto unraveling these cold nuclear matter effects. The first is the extension of heavy quarkonia measurements to more forward rap idities where the effects of gluon saturation and initial state parton ene rgy loss\nare predicted to be enhanced. The second is the determination o f transverse momentum dependent (TMD) gluon parton distributions in nuclei . Recent theoretical progress indicates that \nwhile TMD factorization is broken\, it is recovered at low-x and makes a direct connection to \nColor Glass Condensate calculations. These distributions will be measured using \ndirect photon-jet and jet-jet correlations - a primary design requiremen t for the sPHENIX forward\nupdate plan.\n\nhttp://indico.cern.ch/contribut ionDisplay.py?contribId=539&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=539&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Event-by-event generation of electromagnetic fields in heavy-ion c ollisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-538@cern.ch DESCRIPTION:Speakers: HUANG\, Xu-Guang (Institute for Theoretical Physics) \nWe compute the electromagnetic fields generated in heavy-ion collisions by using the HIJING model. Although after averaging over many events only the magnetic field perpendicular to the reaction plane is sizable\, we fin d very strong electric and magnetic fields both parallel and perpendicular to the reaction plane on the event-by-event basis. We study the time evol ution and the spatial distribution of these fields. In particular\, the el ectromagnetic response of the quark-gluon plasma can give nontrivial evolu tion of the electromagnetic fields.\n\nhttp://indico.cern.ch/contributionD isplay.py?contribId=538&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=538&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Soft gluon emission and energy loss of heavy flavors in relativist ic heavy ion collisions DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-50@cern.ch DESCRIPTION:Speakers: Mr. ABIR\, Raktim (Saha Institute of Nuclear Physics )\nMost of the the calculations on gluon emission off a heavy quark\, with in perturbative QCD\, have been performed in the literature using light co ne gauge with eikonal approximations. Recently we revisited the issue in F eynman gauge that resulted in a very compact and elegant expression for th e suppression factor for gluon emission off a heavy quark [1]. This gener alization is valid for the full range of rapidity of the radiated gluons a nd also has no restriction on the scaled mass of the quark with its energy . In the appropriate limit it correctly reproduces the usual dead cone fac tor in the forward rapidity region [2]. On the other hand\, this suppressi on factor becomes close to unity in the backward direction. We then obtai n the radiative energy loss of a heavy quark in a deconfined medium due to radiation of gluons off them using this derived gluon emission spectrum. We find that the heavy flavor loses energy almost in a similar fashion lik e light quarks through this process. This indicates a small suppression of gluon emission in the backward region\, which should have an impact on th e phenomenology of heavy quark energy loss in the hot and dense matter pro duced in ultra-relativistic heavy-ion collisions. An analysis of the nucle ar modification factor for $D$-meson at LHC is found to be in very good ag reement with the most recent data from ALICE collaboration at 2.76 ATeV Pb -Pb collisions [3]. \n\n1. R. Abir\, C. Greiner\, M. Martinez\, M. G. Mu stafa and J. Uphoff\,\n "Soft gluon emission off a heavy quark revisit ed"\n Phys. Rev. D 85\, 054012 (2012)\n arXiv:1109.5539 [hep-ph].\ n2. Y. L. Dokshitzer and D. E. Kharzeev\n "Heavy quark colorimetry o f QCD Matter" \n Phys. Lett. B 519 (2001) 199-206 \n3. R. Abir\, U. Jamil\, M. G. Mustafa and D. K. Srivastava\,\n "Heavy Quark Energy Lo ss and D Mesons at LHC"\n arXiv:1203.5221 [hep-ph].\n\nhttp://indico.c ern.ch/contributionDisplay.py?contribId=50&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=50&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Influence of a Critical Point on Hydrodynamic Fluctuations in Heav y Ion Collisions DTSTART;VALUE=DATE-TIME:20120817T184000Z DTEND;VALUE=DATE-TIME:20120817T190000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-115@cern.ch DESCRIPTION:Speakers: KAPUSTA\, Joseph (University of Minnesota (US))\nHyd rodynamic fluctuations are inherent in any small space-time varying system . They may be significantly impacted by the presence of a critical point i n the QCD equation of state during the expansion phase of a heavy ion coll ision. Simple models are studied to gain insight into the essential physi cs. This study suggests which observables are most sensitive to a critica l point\, although much more sophisticated numerical simulations need to b e done to compare directly with experimental data.\n\nhttp://indico.cern.c h/contributionDisplay.py?contribId=115&sessionId=24&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=115&sessionId=2 4&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:E-by-E MUSIC Afterburner DTSTART;VALUE=DATE-TIME:20120814T220500Z DTEND;VALUE=DATE-TIME:20120814T222500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-114@cern.ch DESCRIPTION:Speakers: JEON\, Sangyong (McGill University)\nHydrodynamic mo dels enjoy much success in describing and predicting\nthe bulk dynamics of relativistic heavy ion collisions.\nRecent studies have clearly shown tha t including initial and final fluctuations is essential for detailed study of the evolving QGP.\nSo far\, however\, not many studies appeared which incorporate both fluctuations at the same time.\nHere we present our first results in including both the initial and final state fluctuations by com bining the event-by-event 3-D viscous hydrodynamics model (MUSIC) with the publicly available UrQMD afterburner. Influence of these fluctuations on particle spectra\, elliptic flow and higher harmonics will be presented.\n \nhttp://indico.cern.ch/contributionDisplay.py?contribId=114&sessionId=47& confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=114&sessionId=4 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Prospective for A Fixed-Target ExpeRiment at the LHC: AFTER@LHC DTSTART;VALUE=DATE-TIME:20120817T213000Z DTEND;VALUE=DATE-TIME:20120817T215000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-116@cern.ch DESCRIPTION:Speakers: RAKOTOZAFINDRABE\, Andry Malala (CEA - Centre d'Etud es de Saclay (FR))\nWe outline the physics opportunities~\\cite{Brodsky:20 12vg} which are offered by a next generation and multi-purpose fixed-targe t experiment exploiting the LHC beams extracted by a bent crystal. This ma ture extraction technique offers an ideal way to obtain a clean and very c ollimated high-energy beam\, without altering the performance of the LHC~\ \cite{Uggerhoj:2005xz\,Scandale:2011zz\,LUA9}. The multi-TeV LHC beams gra nt the most energetic fixed-target experiment ever performed\, to study \\ pp\, \\pd\\ and \\pA\\ collisions at \\mbox{$\\sqrt{s_{NN}} \\simeq 115\\\ ,\\mathrm{GeV}$} and \\PbA\\ collisions at \\mbox{$\\sqrt{s_{NN}} \\simeq 72\\\,\\mathrm{GeV}$}. AFTER -- for A Fixed-Target ExperRiment -- gives ac cess to new domains of particle and nuclear physics complementing that of collider experiments\, in particular RHIC and the projects of electron-ion colliders. The typical instantaneous luminosity achievable with AFTER in \\pp\\ and \\pA\\ mode~\\cite{Brodsky:2012vg} surpasses that of RHIC by mo re than 3~orders of magnitude and is comparable to that of the LHC collid er mode. This provides a quarkonium and heavy-flavour observatory in \\pp\ \ and \\pA\\ collisions where\, by instrumenting the target-rapidity regio n\, gluon and heavy-quark distributions of the proton\, the neutron and th e nuclei can be accessed at large $x$ and even at $x$ larger than unity in the nuclear case.\nThe nuclear target-species versatility provides a uniq ue opportunity to study cold nuclear matter versus the features of the hot and dense matter formed in heavy-ion collisions\, including the formation of the quark-gluon plasma. During the one-month lead runs\, \\PbA\\ colli sions can be studied at a luminosity comparable to that of RHIC and the LH C over the full range of target-rapidity domain. Modern detection technolo gy should allow for the study of quarkonium excited states\, in particular the $\\chi_c$ and $\\chi_b$ resonances\, even in the challenging high-mul tiplicity environment of \\pA\\ and \\PbA\\ collisions\, magnified by the boost of the fixed-target mode.\nPrecise data from \\pp\, \\pA\\ and \\PbA \\ should help to greatly improve our understanding of heavy-quark and qua rkonium production\, to clear the way to use them for gluon and heavy-quar k PDF extraction in free and bound nucleons\, to unravel cold from hot nuc lear effects and to restore the status of heavy quarkonia as a golden test of lattice QCD in terms of dissociation temperature predictions at a \\sq rtsNN\\ where the recombination process is expected to have a small impact . The fixed-target mode also has the advantage to allow for spin measureme nts with polarized targets. We will discuss a tentative design for AFTER\, and report the projected detector performances from the first preliminary simulations.\n\n\n\\begin{thebibliography}{4}\n\n\n\\bibitem{Brodsky:2012 vg}\n S.~J.~Brodsky\, F.~Fleuret\, C.~Hadjidakis and J.~P.~Lansberg\,\n arXiv:1202.6585 [hep-ph].\n %%CITATION = ARXIV:1202.6585\;%%\n\n\\bibitem {Uggerhoj:2005xz}\n E.~Uggerh\\o j\, U.~I.~Uggerh\\o j\,\n Nucl.\\ Instr um.\\ Meth.\\ B {\\bf 234} (2005) 31.\n %%CITATION = NUIMA\,B234\,31\;%\ n\n\\bibitem{Scandale:2011zz}\n W.~Scandale\, {\\it et al.}\, \n Phys.\\ Lett.\\ {\\bf B703 } (2011) 547-551.\n \n\\bibitem{LUA9} W.~Scandale\, {\\it et al.} [LUA9]\, CERN-LHCC-2011-007\, 2011.\n\nhttp://indico.cern.c h/contributionDisplay.py?contribId=116&sessionId=58&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=116&sessionId=5 8&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Assessment of heavy-ion background fluctuations via Independent Pa rticle Emission in full jet reconstruction measurements DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-111@cern.ch DESCRIPTION:Speakers: Mr. YALDO\, Christopher (Wayne State University)\nTh e main difficulty in precise and systematically controlled jet measurement s in heavy-ion collisions is the correction for the soft underlying backgr ound fluctuation as well as for additional hard scatterings occurring in t he nucleus-nucleus collision. To minimize non-trivial biases in jet-quench ing measurements by imposing kinematical constraints on the jet fragmentat ion and to suppress background fluctuations requires a precise description of background fluctuations down to very low momentum. In order to avoid a mbiguities in the background fluctuation estimate\, caused by additional h ard scatterings\, especially in the inclusive jet cross-section measuremen t at lower jet energies\, we propose a statistical correction scheme: The Independent Particle Emission Model. In this approach we characterize the soft underlying heavy-ion background fluctuations in a typical jet area vi a a statistical convolution of multiplicity and (mean) transverse momentum pT fluctuations. In addition higher order flow harmonics (vn) will be tak en properly into account. We will present simulation studies in order to e stimate the precision of the Independent Particle Emission Model. Furtherm ore we will discuss conceptually how this approach can be applied in data analysis and how one can assess the validity of the assumed functional for m in a data driven way.\n\nhttp://indico.cern.ch/contributionDisplay.py?co ntribId=111&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=111&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:$\\omega(782)$ and $\\phi(1020)$ mesons from di-leptonic decay cha nnels at the STAR experiment DTSTART;VALUE=DATE-TIME:20120818T141000Z DTEND;VALUE=DATE-TIME:20120818T142000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-110@cern.ch DESCRIPTION:Speakers: WADA\, Masayuki (University of Texas at Austin)\nHad ronic resonances can play a pivotal role in providing experimental\neviden ce for partial chiral symmetry restoration in the deconfined\nquark-gluon phase produced in high energy nucleus-nucleus collisions.\nTheir lifetimes \, which are comparable to the lifetime of the fireball\,\nmake them a val uable tool to study medium modifications to the\nresonant state due to the chiral phase transition signatures of mass\nshifts and/or width broadenin gs. This can be done via the leptonic\ndecay of resonances with relatively small interaction of leptonic\ndaughter particles with dense hadronic med ium\, however hadronic\nregeneration of resonances feeds into this signatu re as well.\nParticle identification based on the STAR upgraded Time-of-Fl ight\ndetector in conjunction with energy-loss (dE/dx) from the Time\nProj ection Chamber is used for a clean electron and positron\nidentification.\ nWe will present the measurement of masses\, widths\, transverse momentum\ nspectra\, and yields of $\\omega(782)$ and $\\phi(1020)$ mesons at\nmid-r apidity in Au+Au collisions at \\sqrts{s_{NN}} = 200 GeV and\ncompare the $\\phi(1020)$ result to those from the hadronic decay\nchannel.\n\nhttp:// indico.cern.ch/contributionDisplay.py?contribId=110&sessionId=29&confId=18 1055 LOCATION:Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=110&sessionId=2 9&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Dielectron Production in Au+Au-Collisions at $\\sqrt{s_{NN}}$ =39 \\& 62.4 GeV at STAR DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-113@cern.ch DESCRIPTION:Speakers: Mr. HUCK\, Patrick (CCNU/LBNL)\nIn the years 2010/11 \, the Solenoidal Tracker At RHIC (STAR) conducted a Beam Energy Scan (BES ) over a wide range of center-of-mass energies with the purpose of studyin g the properties of the Quark-Gluon-Plasma (QGP) as well as searching for the onset of deconfinement and the critical point of the QCD phase diagram . The installation of the Barrel Time-Of-Flight-Detector (TOF) has enabled STAR to identify electrons over a wide momentum range. Combined with its large acceptance\, excellent PID\, and a low material budget in the runs o f 2010/11\, STAR now provides unique capabilities for the study of dielect ron production in heavy ion collisions.\nDue to their negligible strong in teraction with the dense medium created at RHIC\, leptons can escape the i nteraction region undistorted and thus\, carry direct information about th e space-time evolution of the fireball created in relativistic heavy-ion c ollisions. In the special case of dileptons\, their invariant mass ($m_{ee }$) serves as an additional observable: For the BES energies\, later diele ctron creation times are accessible in the Low-Mass-Region (LMR\, $m_{ee}\ n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=113&sessionId=37 &confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=113&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Investigating the ridge structure in #Delta#eta-#Delta#phi correla tions at STAR DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-112@cern.ch DESCRIPTION:Speakers: Mr. DE SILVA\, L. Chanaka (University of Houston)\nT riggered di-hadron correlation studies using Au+Au collisions at #sqrt(S_{ NN}) = 200GeV in STAR revealed a novel “ridge-like” structure in two d imensions (#Delta#eta\, #Delta#phi) [1] for high p_{T} particles. Similar structure was also present in an inclusive un-triggered di-hadron correlat ion analysis [2]. We study the evolution of un-triggered analysis by incr easing the lower p_{T} cut of both charged particles. A smooth evolution o f data is observed and our results reproduce the initial triggered analysi s structure near = 2.7 GeV/c. We further quantify the correlation structu re evolution by fitting a model function. The model function emphasizes po ssible initial state fluctuation contribution via the use of higher harmon ic model components\; v_{n} (n=1\,2\,3\,4) and the remainder is modeled vi a an asymmetric 2d Gaussian. Extracted harmonic parameters are compared to model predictions [3\,4] and remainder is quantified via p+p data at #sqr t(S_{NN}) = 200GeV and charge dependent studies.\n\n[1] B. I. Abelev et al . (STAR Collaboration)\, Phys. Rev. C 80\, 064912 (2009)\n[2] M Daugherity et al. (STAR Collaboration)\, J. Phys. G 35\, 104090 (2008)\n[3] B. Alver et al.\, Phys. Rev. C 81\, 054905 (2010)\n[4] C. Gombeaud et al.\, Phys. Rev. C 81\, 014901 (2010)\n\nhttp://indico.cern.ch/contributionDisplay.py? contribId=112&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=112&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Thermal dileptons in high-energy heavy ion collisions with 3+1D re lativistic hydrodynamics DTSTART;VALUE=DATE-TIME:20120815T123000Z DTEND;VALUE=DATE-TIME:20120815T125000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-119@cern.ch DESCRIPTION:Speakers: VUJANOVIC\, Gojko (McGill University)\nThe penetrati ng nature of dileptons makes them suitable probes to explore the propertie s of the strongly-interacting medium created in relativistic nuclear colli sions. This study investigates thermal dilepton production using MUSIC (a Monotone Upstream-centered Scheme for Ion Collisions): a 3+1D hydrodynami c simulation with or without shear viscosity. We utilize dilepton emissio n rates that are derived from in-medium hadronic spectral functions\, and from pQCD. In addition to the invariant mass and momentum distributions\, the elliptic flow of lepton pairs is calculated\, and the effects of a fi nite shear viscosity coefficient are also analyzed. We present results ap propriate for measurements by the PHENIX and STAR collaborations\, and mak e predictions for the LHC.\n\nhttp://indico.cern.ch/contributionDisplay.py ?contribId=119&sessionId=10&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=119&sessionId=1 0&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:An extreme granularity electromagnetic calorimeter using monolithi c pixels for future forward measurements in ALICE DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-118@cern.ch DESCRIPTION:Speakers: POLJAK\, Nikola for the ALICE-FoCal collaboration (N IKHEF/Univeristy of Utrecht)\nA forward electromagnetic calorimeter (FoCal )\, to be placed in the pseudorapidity range of $2.5\n\nhttp://indico.cern .ch/contributionDisplay.py?contribId=118&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=118&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Identical kaon femtoscopic correlations in proton-proton and heavy -ion collisions at the LHC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-429@cern.ch DESCRIPTION:Speakers: STEINPREIS\, Matthew Donald (Ohio State University ( US))\nFemtoscopic correlations allow one to measure the space-time charact eristics of particle production thanks to the effects of quantum statistic s for identical particles and final state interactions for both identical and non-identical particles. The main features of the femtoscopy measurem ents in heavy-ion collisions from SPS to RHIC and LHC are i) the increase of the correlation radii with increasing multiplicity of events and ii) th e decrease of the radii with increasing pair transverse momentum/transvers e mass. These are understood as a manifestation of strong collective flow. \nWe report the measurement of correlations of two identical kaons (neutra l and charged) in pp and Pb-Pb collisions by the ALICE experiment at the L arge Hadron Collider (LHC). The increase of correlation radii for increasi ng multiplicity was observed both in Pb-Pb and pp collisions. The decrease of kaon radii for increasing transverse momentum was observed in Pb-Pb co llisions. Similar behaviour of the radii was observed at high multipliciti es in pp collisions. However at low multiplicity the behaviour of the radi i is completely different. This observation may indicate a similarity betw een high multiplicity pp collisions and heavy ion collisions.\n\nhttp://in dico.cern.ch/contributionDisplay.py?contribId=429&sessionId=37&confId=1810 55 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=429&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Balance function studies for non–identified particles in Pb–Pb collisions at √sNN = 2.76 TeV DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-428@cern.ch DESCRIPTION:Speakers: RODRIGUEZ MANSO\, Alis (NIKHEF (NL))\nThe possible c reation of a strongly interacting deconfined phase (Quark-Gluon plasma) in relativistic heavy ion collisions would be measurable in a delayed hadron ization time. It was proposed to test this hypothesis via the measurement of correlations between positive and negatively charged pairs pairs as a f unction of rapidity\, the so-called Balance functions\, which was done at SPS and RHIC energies. We will present first studies of Balance functions at LHC energies with the ALICE experiment. In Pb–Pb collisions at √sNN = 2.76 TeV the width of Balance functions in pseudorapidity and azimuthal angle for non-identified charged particles shows a clear centrality depen dence. In addition a comparison to other experiments (NA49\, STAR) at lowe r c.m. energies and different models (Hijing\, AMPT\, Blast wave) will be presented.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=428&s essionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=428&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of net-charge fluctuations by ALICE at the LHC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-421@cern.ch DESCRIPTION:Speakers: JENA\, Satyajit (IIT- Indian Institute of Technology (IN))\nCharge fluctuations are considered to provide a possible signature for the existence of the de-confined Quark Gluon Plasma phase (QGP). Char ge fluctuations are sensitive to the number of charges in the system\, thu s the fluctuations in the QGP\, with fractionally charged partons\, are si gnificantly different from those of hadron gas with unit charged particles . The study of charge fluctuations have been carried out by using the vari able\, ν(+−\,dyn) which\, by its construction\, is free from the collis ional bias\, i.e.\, impact parameter fluctuations and fluctuations from th e finite number of charged particles within the detector acceptance. The d ependence of charge fluctuations on the rapidity windows for various centr ality bins are analyzed for Pb+Pb collisions at √sNN = 2.76 TeV in the A LICE experiment at CERN-LHC. Furthermore the higher moments of net-charge distribution are examined. It has been demonstrated that higher moments as well as moment products are sensitive to the correlation length and direc tly connected to the thermodynamic susceptibilities computed in the Lattic e QCD.\n\nWe observe that the dynamical fluctuations\, measured in terms o f ν(+−\,dyn)\, decrease while going from peripheral to central collisio ns. We examine the dependence of fluctuations\, using the D-measure\, on t he pseudorapidity interval ∆η\, which may account for the dilution of f luctuations during the evolution of the system. The higher moments like me an\, sigma (σ)\, skewness (S)\, kurtosis (K) and the quantities like Sσ and Kσ2 of net-charge are estimated as a function of centrality. The expe rimental values are compared to the theoretical expectations for a hadron gas and a Quark Gluon Plasma (QGP). The results will be shown and discusse d.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=421&sessionId =37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=421&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Mixed harmonic charge dependent azimuthal correlations in Pb-Pb co llisions at 2.76TeV measured with the ALICE experiment at the LHC DTSTART;VALUE=DATE-TIME:20120814T214500Z DTEND;VALUE=DATE-TIME:20120814T220500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-420@cern.ch DESCRIPTION:Speakers: HORI\, Yasuto (University of Tokyo (JP))\nThe charge dependence of the azimuthal correlations between produced hadrons is\nan important probe of the QGP matter created in relativistic heavy-ion collis ions. In\nthis talk\, we will present the mixed harmonic charge dependent azimuthal correlations\nmeasured at mid-rapidity in Pb-Pb collisions at \\ sqrt{s_{NN}} = 2.76 TeV by the ALICE Collaboration at the LHC. We observe a clear charge separation of hadrons with respect to the reaction plane me asured via the mixed harmonic multi-particle technique. Implications\nfrom these measurements for the possible effects of local parity violation in the strong\ninteraction and for models which incorporate the effects of lo cal charge conservation on\nfreeze-out surface and azimuthal flow will be discussed.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=420&s essionId=49&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=420&sessionId=4 9&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Jet-medium interactions in Pb-Pb collisions DTSTART;VALUE=DATE-TIME:20120815T150000Z DTEND;VALUE=DATE-TIME:20120815T152000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-423@cern.ch DESCRIPTION:Speakers: ULERY\, Jason Glyndwr (Johann-Wolfgang-Goethe Univ. (DE))\nPrevious experimental measurements from nuclear collisions have ind icated modifications of jets by interaction with the medium created in the collision. Observables from particle correlations in the ALICE detector c ontinue to provide access to key properties of the hot deconfined nuclear matter. New results from two- and three-particle number and transverse mom entum correlations are presented. Specifically\, correlation function pro perties are characterised as a function of transverse momentum and central ity and for different charge combinations. Fourier decompositions are perf ormed\, the jet-like peak is characterised\, and identified particle ratio s are studied in the jet-like peak and compared to those in the bulk. Thes e results suggest strong modifications of the peak shape and particle rati os in central collisions\, compared to proton-proton or peripheral data. M odel comparisons are included to assist interpretation of these results.\n \nhttp://indico.cern.ch/contributionDisplay.py?contribId=423&sessionId=52& confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=423&sessionId=5 2&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Study of the production of B-decay electrons at high momentum in p p collisions at sqrt(s)=7 TeV using secondary vertex reconstruction in ALI CE DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-422@cern.ch DESCRIPTION:Speakers: ARONSSON\, Tomas (Yale University (US))\nHigh-energy heavy-ion collisions at the LHC allow for the study of the properties of the quark-gluon plasma (QGP). Heavy quarks\, charm and bottom\, produced i n the initial hard scattering processes of the collision are excellent pro bes of the QGP.\nWhen heavy quarks traverse the QGP they are expected to l ose energy and such energy loss is predicted to be smaller than for gluons and light quarks. On the other hand\, recent experimental data indicate l arger energy loss than expected. Heavy flavour production can be studied u sing electrons from semi-leptonic decays of D and B mesons. The separation of electrons from these two sources (charm and bottom) is of crucial impo rtance to address the expected mass dependence of energy loss. In this pos ter\, we present the measurement of electrons from bottom in the transvers e momentum range of 7-12 GeV in 7 TeV p-p collisions. The ALICE EMCal dete ctor possesses outstanding particle identi\n\nhttp://indico.cern.ch/contri butionDisplay.py?contribId=422&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=422&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Meson and baryon femtoscopy in heavy-ion collisions at ALICE DTSTART;VALUE=DATE-TIME:20120814T185500Z DTEND;VALUE=DATE-TIME:20120814T191500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-425@cern.ch DESCRIPTION:Speakers: SZYMANSKI\, Maciej Pawel (Warsaw University of Techn ology (PL))\nIn heavy-ion collisions produced at the LHC two-particle corr elations\nof mesons and baryons carry important information about the emit ting\nsource. At low relative momentum femtoscopic correlations arise\, wh ich\nare sensitive to the homogeneity lengths of the system. Hydrodynamic\ nmodels predict that these will decrease with increasing transverse\nmass of the pair. Such decrease is universally reported for pions\,\nalso at th e LHC. Kaons and baryons\, having a much larger mass\, allow\nto significa ntly extend the range of measured m_T. The femtoscopic\nresults for heavie r particles would put a strong constraint on such\npredictions. Non-identi cal baryon and meson pairs are also sensitive\nto emission asymmetries.\n\ nFemtoscopic correlations between baryons arise mostly due to\nthe strong interaction\, which is not precisely known for some baryon\npair types. Mo st notable example is the lambda-lambda interaction\nwhich has an unknown contribution due to the potential existence of\nthe H0 dibaryon. Equally i nteresting are baryon-antibaryon\npotentials\, which have a significant co ntribution from annihilation\nchannels. These processes may have an impact on single-particle\nspectra\, and should be investigated as one of the po ssible sources of\nthe small proton yield at the LHC.\n\nWe show the two-p article correlation functions for several pair types\n(baryon-baryon\, bar yon-antibaryon and meson-meson)\, consisting of\nneutral and charged kaons \, protons and lambdas. Femtoscopic analysis\nis carried out for them\, ta king into account\, when necessary\, residual\ncorrelations and annihilati on channels. Results are presented as a\nfunction of transverse mass and e vent multiplicity\, comparing with the\npp collisions results when possibl e. Correlations with lambdas are\nanalyzed both with femtoscopic methods a s well as to study the unknown\ninteraction potentials.\n\nhttp://indico.c ern.ch/contributionDisplay.py?contribId=425&sessionId=4&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=425&sessionId=4 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:D*-hadron azimuthal correlations in pp collisions at $\\sqrt{s} =7 TeV$ with ALICE DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-427@cern.ch DESCRIPTION:Speakers: BJELOGRLIC\, Sandro (University of Utrecht (NL))\nDu e to their relatively high mass\, heavy-flavour quarks\, produced in high- energy heavy-ion collisions\, are sensitive probes of the interaction dyna mics inside the hot and dense QCD matter. \nSince heavy quarks are produce d in pairs during the initial stage of the collision\, before the formatio n of the QGP\, the measurement of heavy-flavour hadron production provides profound information on the properties of the produced medium. A detailed understanding of the pair production mechanisms in proton-proton collisio ns is interesting both as a QCD test tool as well as a reference for futur e heavy-ion studies. \nThis particular physical process can be investigate d using the angular azimuthal correlation between open-charmed mesons and charged hadrons. This correlation exhibits characteristic near-side and aw ay-side structures that are produced by the charged hadrons from the fragm entation and decay of the partner charmed meson. The azimuthal direction i s expected to be sensitive to the heavy quark production mechanism and can be compared to the perturbative QCD calculations. \nD mesons are reconstr ucted in several hadronic channels in the ALICE experiment at the LHC. Usi ng $D*^{\\pm}$ mesons is advantageous because they can be selected with h igher purity with respect to D0 and $D^{+}$. Correlating with kaons (ident ified $K^{\\pm}$ or reconstructed $K0_{S}$) that are produced with high p robability in charm decays\, provides a reduction of the background in the correlation distribution.\nIn this contribution results of this correlati on analysis\, performed using the minimum bias proton-proton collisions at $\\sqrt{s} = 7 TeV$ collected by the ALICE experiment in 2010\, will be p resented.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=427&se ssionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=427&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Source chaoticity in heavy-ion collisions at the LHC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-426@cern.ch DESCRIPTION:Speakers: GANGADHARAN\, Dhevan Raja (Ohio State University (US ))\nQuantum coherence is fundamental in the interpretation of geometrical information from HBT measurements. The effect of quantum coherence is not only to lower the correlation strength of HBT correlations but also to mod ify the shape. We present measurements of the source chaoticity from Pb+Pb sqrt(s) = 2.76 TeV collisions at the LHC using the ALICE detector. Three- pion and two-pion correlations strengths are used together to determine\nt he source chaoticity. The corresponding impact of quantum coherence on the HBT radii will be discussed as well.\n\nhttp://indico.cern.ch/contributio nDisplay.py?contribId=426&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=426&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Light (anti)nucleus production in $\\sqrt{\\rm s_{\\rm NN}}$$=$7.7 -200 GeV Au$+$Au collisions in the STAR Experiment DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-308@cern.ch DESCRIPTION:Speakers: LLOPE\, W.J. (Rice University)\nIn the dense and hig h-temperature systems formed in relativistic\nheavy-ion collisions\, final -state composites - light nuclei and\nantinuclei - are formed close to the freeze-out hypersurface. Their\nspectra\, compared to those of the consti tuent (anti)nucleons\, can be\ndescribed by picturing the formation proces s as the coalescence of a\nnumber of nucleons that are close to each other in phase space. This\nmakes the composite spectra sensitive to the distri bution of the\nconstituent nucleons in phase space. It also implies a sens itivity of\nthe spectra to the local densities and flow velocities of the source.\nIn the coalescence picture\, specific ratios of these spectra pro vide\ninformation on the baryon densities and homogeneity volumes. The \nS TAR experiment has collected data from Au$+$Au collisions at \nseven beam energies\, $\\sqrt{\\rm s_{\\rm NN}}$\, ranging from 7.7 \nto 200 GeV. The particle identification is performed for transverse \nmomenta from $\\sim $0.3 to \n\\raisebox{-0.6ex}{$\\stackrel{>}{\\sim}$}3 GeV/c using a\ncombi nation of the ionization energy loss in the Time Projection\nChamber and t he time of flight. The spectra for (anti)protons\,\n(anti)deuterons\, and (anti)tritons at mid-rapidity\, and the source\ninformation inferred from these spectra\, will be presented and\ncompared to several dynamic coalesc ence models.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=308 &sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=308&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Transverse momentum dependence of the low-mass dielectron enhancem ent - effects of radial flow DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-309@cern.ch DESCRIPTION:Speakers: VARGYAS\, Marton (ELTE)\nPHENIX has measured the e^{ +}e^{-} pair continuum in sqrt(s_{NN})=200 GeV Au+Au and p+p collisions ov er a wide range of mass and transverse momenta. The e^{+}e^{-} yield is co mpared to the expectations from hadronic sources\, based on PHENIX measure ments. We investigate the effects of radial flow on the transverse mass de pendence of the dilepton spectrum in min. bias Au+Au collisions in the low mass region. The analysis results will be detailed in the region around t he omega and phi mass\, 0.7 \n\nhttp://indico.cern.ch/contributionDisplay. py?contribId=309&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=309&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:HBT Measurements for charged pions in √s_{\\text{}NN}=39\, 62.4 and 200 GeV Au+Au collisions at RHIC-PHENIX DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-300@cern.ch DESCRIPTION:Speakers: MWAI\, Alex (Stony Brook University)\nHBT measuremen ts are sensitive to the expansion dynamics of the system and they can prov ide information on the size of the source in space and time at freeze-out (hadron decoupling). Previously\, the size of the region of homogeneity ha s been shown to have an almost linear dependence with particle multiplicit y at different beam collision energies. A question of interest is whether the same trend extends across the range in beam energies recently obtained for run-10 of RHIC. To address this question\, results for HBT measuremen ts for charged pion pairs at √s_{\\text{}NN}=39\, 62.4 and 200 GeV beam energies Au+Au collisions\, obtained using the PHENIX detector\, will be p resented. These results will be compared to previous findings at lower col lision energies and varying collision systems. The results will also be co mpared to the recent studies done at √s_{\\text{}NN}=2.76 TeV Pb+Pb coll isions obtained by the ALICE collaboration.\n\nhttp://indico.cern.ch/contr ibutionDisplay.py?contribId=300&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=300&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of $R_AA(\\Upsilon)$ at PHENIX DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-301@cern.ch DESCRIPTION:Speakers: WHITAKER\, Shawn (Iowa State University)\nThe suppre ssion of quarkonia in heavy ion collisions has long been thought to provid e an indication of the temperature dependent Debye screening length of col or charge in the quark gluon plasma. A large sample of Au+Au collisions at $\\sqrt{s_{NN}}$=200 GeV have been collected by PHENIX in 2010. Using the PHENIX measurement of Upsilon production in p+p collisions as a reference \, we will present the preliminary measurement of nuclear modification fac tor for Upsilon(1S+2S+3S) at mid-rapidity.\n\nhttp://indico.cern.ch/contri butionDisplay.py?contribId=301&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=301&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Shear Viscosities of Hadronic Gases DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-303@cern.ch DESCRIPTION:Speakers: Dr. DEMIR\, Nasser (Kuwait University)\nWe present a detailed comparison between two different methods to calculate\nthe shear viscosity coefficient for a set of four hadronic systems. One calculation \nemploys the Chapman-Enskog method to calculate the shear viscosity coeff icient\nfor a hot hadronic system. The other calculation uses the Green-Ku bo method\nto calculate the shear viscosity for a hadronic medium simulate d using \nthe Ultrarelativistic Quantum Molecular Dynamics (UrQMD) model. The calculations\nare performed over a temperature range of 60-200 MeV\, a nd the differences\nin the values for the calculations are highlighted. Th e degrees of freedom and\ncross sections of the systems for the two calcul ations are synchronized to ensure\nthe most accurate comparison possible. The systems studied include those of\nmassive and massless pions with a fi xed cross section\, that of chiral pions with\nenergy dependent cross sect ion\, and that of a gas of pions and rho resonanaces.\nThe lifetime of the rho resonance is varied and the effect of the rho resonance\nlifetime on the shear viscosity is investigated.\n\nhttp://indico.cern.ch/contribution Display.py?contribId=303&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=303&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:vSPheRIO: A New Event-by-Event Viscous Hydrodynamical Code DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-304@cern.ch DESCRIPTION:Speakers: NORONHA-HOSTLER\, Jacquelyn (U)\nvSPheRIO is a new s econd order viscous hydrodynamic code for ultrarelativistic heavy ion coll isions that can be consistently run on an event-by-event basis. This code\ , which is the viscous generalization of the well known SPheRIO\n code \\c ite{Aguiar:2000hw}\, solves second order viscous hydrodynamic equations. I n this talk\, we use vSPheRIO to investigate the time evolution of a boost invariant QGP\, with a realistic equation of state \\cite{Huovinen:2009yb }\, and \ntemperature dependent $\\eta/s$ and $\\zeta/s$ \\cite{NoronhaHos tler:2008ju}. Results for the anisotropic flow coefficients $v_2$ to $v_5$ obtained within this setup are compared to other viscous hydrodynamic cal culations \nthat involved constant $\\eta/s$ and $\\zeta/s$ ratios \\cite{ Schenke:2011bn}. \n\n%\\cite{Aguiar:2000hw}\n\\bibitem{Aguiar:2000hw} \n C.~E.~Aguiar\, T.~Kodama\, T.~Osada and Y.~Hama\,\n %``Smoothed particle hydrodynamics for relativistic heavy ion collisions\,''\n J.\\ Phys.\\ G G {\\bf 27}\, 75 (2001)\n [hep-ph/0006239]\; Y.~Hama\, T.~Kodama and O.~ Socolowski\, Jr.\,\n %``Topics on hydrodynamic model of nucleus-nucleus c ollisions\,''\n Braz.\\ J.\\ Phys.\\ {\\bf 35}\, 24 (2005)\n [hep-ph/04 07264]\; R.~Andrade\, F.~Grassi\, Y.~Hama\, T.~Kodama and O.~Socolowski\, Jr.\,\n %``On the necessity to include event-by-event fluctuations in exp erimental evaluation of elliptical flow\,''\n Phys.\\ Rev.\\ Lett.\\ {\\ bf 97}\, 202302 (2006)\n [nucl-th/0608067].\n\n%\\cite{Huovinen:2009yb}\n \\bibitem{Huovinen:2009yb} \n P.~Huovinen and P.~Petreczky\,\n %``QCD Eq uation of State and Hadron Resonance Gas\,''\n Nucl.\\ Phys.\\ A {\\bf 83 7}\, 26 (2010)\n [arXiv:0912.2541 [hep-ph]].\n %%CITATION = ARXIV:0912.2 541\;%%\n\n%\\cite{NoronhaHostler:2008ju}\n\\bibitem{NoronhaHostler:2008ju } \n J.~Noronha-Hostler\, J.~Noronha and C.~Greiner\,\n %``Transport Coe fficients of Hadronic Matter near T(c)\,''\n Phys.\\ Rev.\\ Lett.\\ {\\b f 103}\, 172302 (2009)\; \n H.~Niemi\, G.~S.~Denicol\, P.~Huovinen\, E.~M olnar and D.~H.~Rischke\,\n %``Influence of the shear viscosity of the qu ark-gluon plasma on elliptic flow in ultrarelativistic heavy-ion collision s\,''\n Phys.\\ Rev.\\ Lett.\\ {\\bf 106}\, 212302 (2011)\; G.~S.~Denico l\, T.~Kodama\, T.~Koide and P.~Mota\,\n %``Effect of bulk viscosity on E lliptic Flow near QCD phase transition\,''\n Phys.\\ Rev.\\ C {\\bf 80}\, 064901 (2009).\n\n%\\cite{Schenke:2011bn}\n\\bibitem{Schenke:2011bn} \n B.~Schenke\, S.~Jeon and C.~Gale\,\n %``Higher flow harmonics from (3+1)D event-by-event viscous hydrodynamics\,''\n Phys.\\ Rev.\\ C {\\bf 85}\, 024901 (2012)\n [arXiv:1109.6289 [hep-ph]].\n %%CITATION = ARXIV:1109.62 89\;%%\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=304&sessi onId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=304&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Pion-Kaon Femtoscopy at $\\sqrt{s_{NN}}$ = 200 GeV collisions in S TAR at RHIC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-305@cern.ch DESCRIPTION:Speakers: Mr. YANG\, Yan (Ohio State University)\nCorrelations between non-identical particles at low relative momentum\nin the center o f mass ($|\\vec{k}^*|$) encode unique information on the\nspace-time struc ture of the emitting system. In addition to size of\nthe homogeneity regio n\, analysis of correlation functions in the three-\ndimensional $\\vec{k} ^*$ space can reveal a space-time offset of one\nparticle species (e.g. ka ons) with respect to another (e.g. pions). Early\nresults from STAR at $\\ sqrt{s_{NN}}$ = 130 GeV showed such an\nasymmetry\, which was consistent w ith collective radial flow. This early\nanalysis was hampered by the limi ted particle identification capabilities\nof the STAR Time Projection Cham ber\, as well as from marginal statistics\nand photon conversion due to a significant material budget close to the beam.\nIn year 2010 and year 2011 \, STAR had accumulated more than one billion\nminimum bias events at $\\s qrt{s_{NN}}$ = 200 GeV Au+Au collisions\nwith full Time of Flight detector in operation\, which enables detailed\nnon-identical femtoscopy measureme nts.\n\nWe present new measurements of pion-kaon correlations in the more\ nsensitive spherical harmonic decomposition representation at\n$\\sqrt{s_{ NN}}$ = 200 GeV collisions from these data sets with a lower\nmaterial bud get and much higher statistics. The analysis greatly benefits\nwhen inform ation from the STAR Time of Flight detector is used to\nextend particle id entification capabilities. Centrality dependence of\npion-kaon femtoscopy in Au+Au collisions will be presented for the\nfirst time. Finally\, we pr esent a first similar analysis of p+p collisions\nat $\\sqrt{s}$ = 200 GeV .\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=305&sessionId= 37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=305&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Recent Heavy Quarkonia Results from PHENIX DTSTART;VALUE=DATE-TIME:20120814T191500Z DTEND;VALUE=DATE-TIME:20120814T193500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-306@cern.ch DESCRIPTION:Speakers: MCGLINCHEY\, Darren (F)\nThe idea of using heavy qua rkonia production as a direct probe of the screening length in the quark g luon plasma (QGP) has been around for over two decades. Suppression of qua rkonia production in heavy ion collisions has been measured at the SPS\, R HIC\, and the LHC\, including new measurements of $\\Upsilon(1S+2S+3S)$ pr oduction in Au+Au collisions by PHENIX. However\, a full understanding of these results in terms of direct contributions from the QGP is still evolv ing. An incomplete knowledge of the baseline cold nuclear matter (CNM) eff ects\, as well as the possibility of competing effects present in the QGP\ , such as recombination\, has hindered a full understanding of the observe d heavy ion results.\n\nIn order to quantify the CNM effects present at RH IC\, PHENIX has measured both $J/\\psi$ and $\\Upsilon$ production in $d$+ Au collisions over a wide range in rapidity with the inclusion of new meas urements of $\\Upsilon(1S+2S+3S)$ production at midrapidity. PHENIX finds a suppression relative to $p$+$p$ collisions which is greater at forward r apidity and similar between the $J/\\psi$ and $\\Upsilon$\, leading to int eresting implications of the RHIC heavy ion results. New measurements of t he transverse momentum dependence of the $J/\\psi$ nuclear modification fa ctor provide further constraints on CNM effects\, as well as constraining the Cronin effect at RHIC energies. This talk will present recent heavy qu arkonia results in $p$+$p$\, $d$+Au and Au+Au collisions from PHENIX\, as well as the implications of the measured CNM effects on the heavy ion data .\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=306&sessionId= 5&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=306&sessionId=5 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Jpsi Transverse Momentum Distribution as a Sensitive Signature of the Quark-gluon Plasma DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-568@cern.ch DESCRIPTION:Speakers: ZHUANG\, Pengfei (Tsinghua University)\nDifferent fr om the Jpsi yield which is almost identical at SPS\, RHIC and LHC energies \, the Jpsi transverse momentum distribution is sensitive to the nature of the medium and can be used to probe the quark-gluon plasma formation in h eavy ion collisions. We calculated in a detailed transport approach the nu clear modification factor as a function of transverse momentum\, the avera ged transverse momentum as a function of the number of participants\, and the elliptical flow at RHIC and LHC energies.\n\nhttp://indico.cern.ch/con tributionDisplay.py?contribId=568&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=568&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Quark pair productions in pA collisions from CGC with running coup ling BK evolution DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-569@cern.ch DESCRIPTION:Speakers: WATANABE\, Kazuhiro (The University of Tokyo)\nWe st udy the parton saturation effects on heavy quark production\nin proton-nuc leus collisions at collider energies\, using the CGC\nformula proposed by Blaizot-Gelis-Venugopalan (Nucl.Phys.A743:57-91\,2004).\nPreviously it was numerically evaluated using the unintegrated\ngluon distribution from the McLerran-Venugopalan model including\nthe x-evolution effect with the Bal itsky-Kovchegov equation\n(Fujii-Gelis-Venugopalan\, Nucl.Phys.A780:146-17 4\,2006).\n\nHere we extend the phenomenological study by including the\nr unning coupling effect in the x-evolution. We will investivate\nthe satura tion effects on the quark and quark pair spectra\, and\nthe quarkonium spe ctrum as well\, at the RHIC and LHC energies.\n\nhttp://indico.cern.ch/con tributionDisplay.py?contribId=569&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=569&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:REGGAE: Monte Carlo generator of momenta obeying energy and moment um conservation DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-560@cern.ch DESCRIPTION:Speakers: TOMASIK\, Boris (Univerzita Mateja Bela (SK))\nA Mon te Carlo event generator REGGAE is presented which can generate momenta fo r given set of particles so that total energy and momentum assumes a pre-s et value. The generator is proved to fill the available phase-space unifor mly. In comparison to other algorithms it is considerably more effective i n situations where many particles are produced and/or large part of the to tal energy is stored in form of the masses of particles.\n\nhttp://indico. cern.ch/contributionDisplay.py?contribId=560&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=560&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Yet stronger enhancement of Xi production at SIS DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-561@cern.ch DESCRIPTION:Speakers: TOMASIK\, Boris (Univerzita Mateja Bela (SK))\nWe ca lculate the expectation of Xi yields in nuclear collisions at SIS energies for the case that the produces strangeness is distributed statistically o ver S\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=561&sessio nId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=561&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Anomalous soft photon production from QCD vacuum polarization DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-564@cern.ch DESCRIPTION:Speakers: ILANY\, Joshua (Department of Physics and Astronomy\ , Stony Brook University\, Stony Brook\, New York 11794-3800\, USA)\nAnoma lous soft photon production beyond that predicted by standard Bremsstrahlu ng calculations is a ubiquitous feature in high energy processes\, from e+ e- to heavy ion collisions. We calculate the electromagnetic current due t o the QCD vacuum polarization induced by the qq jets in e+e- annihilation using the Schwinger model\, and source Maxwell’s equations with it. The predicted soft photon emission reproduces the DELPHI Collaboration’s obs ervations in e+e- annihilation\, exhibiting several times the signal expe cted from traditional Bremsstrahlung radiation. We will discuss the impli cations of our results for the soft photon production in heavy ion collisi ons.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=564&session Id=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=564&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Enhanced Jet Quenching in Strongly Interacting Quark Gluon Plasma DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-565@cern.ch DESCRIPTION:Speakers: Prof. RODRIGUEZ\, Ricardo (Ave Maria University)\nWe investigate the possibility of enhanced jet quenching in the vicinity of the critical temperature similar to the scenario proposed by Liao and Shur yak [PRL 102\, 202302(2009)]. We discuss the consequences of the fact that the "shells" of such enhanced\, critical quenching grow thinner as a func tion of the center-of-mass energy sqrt(s) of the collision. A systematic s can of jet quenching as a function of sqrt(s) can put constraints on such critical enhancement scenarios. Lastly we check existing constraints by co mparing results from a numerical calculation using critical enhancement ag ainst high transverse momentum data from RHIC and LHC.\n\nhttp://indico.ce rn.ch/contributionDisplay.py?contribId=565&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=565&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Drell-Yan Lepton-Pair-Jet Correlation in pA collisions DTSTART;VALUE=DATE-TIME:20120817T184000Z DTEND;VALUE=DATE-TIME:20120817T190000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-566@cern.ch DESCRIPTION:Speakers: ZASLAVSKY\, David (Penn State University)\nWe have r ecently performed a numerical study of the forward correlations between th e lepton-pair and associated hadrons in Drell-Yan process in pA collisions . Using the present knowledge of the dipole gluon distribution from the mo dified Golec-Biernat-Wusthoff model and from the solution of the Balitsky- Kovchegov evolution equation\, we are able to compute and predict the forw ard correlations between the lepton-pair and associated hadron in Drell-Ya n process at RHIC and LHC. Similar to the forward dihadron correlation in dAu collisions measured at RHIC\, the Drell-Yan type correlation also impl ies a strong suppression of the away side hadron at forward rapidity due t o the strong interaction between the forward quark from the projectile pro ton and the gluon density from the target nucleus. Another feature of th is process is that the correlation contains a double-peak structure in the away side\, which makes it a unique observable.\n\nhttp://indico.cern.ch/ contributionDisplay.py?contribId=566&sessionId=36&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=566&sessionId=3 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Quark Matter in Darmstadt DTSTART;VALUE=DATE-TIME:20120818T164500Z DTEND;VALUE=DATE-TIME:20120818T170000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-701@cern.ch DESCRIPTION:Speakers: BRAUN-MUNZINGER\, Peter (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))\nhttp://indico.cern.ch/contributionDisplay .py?contribId=701&sessionId=32&confId=181055 LOCATION:Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=701&sessionId=3 2&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Detailed measurements of charmonium suppression in PbPb collisions at 2.76 TeV with CMS DTSTART;VALUE=DATE-TIME:20120814T181500Z DTEND;VALUE=DATE-TIME:20120814T183500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-229@cern.ch DESCRIPTION:Speakers: MOON\, Dong Ho (Korea University (KR))\nCMS has meas ured the nuclear modification factors of prompt J/psi in PbPb collisions a t sqrt(sNN) = 2.76 TeV. For prompt J/psi with relatively high pT (6.5 \n\n http://indico.cern.ch/contributionDisplay.py?contribId=229&sessionId=5&con fId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=229&sessionId=5 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Short- and long-range very-high-pT triggered dihadron correlations in PbPb collisions at 2.76 TeV with CMS DTSTART;VALUE=DATE-TIME:20120814T191500Z DTEND;VALUE=DATE-TIME:20120814T193500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-228@cern.ch DESCRIPTION:Speakers: CONWAY\, Rylan Towne (University of California Davis (US))\nNew precision measurements of dihadron correlations triggered by a very high-pT particle in 2.76 TeV PbPb collisions over a broad range of p seudorapidity and the full range of azimuthal angle will be presented. Uti lizing a novel and unique high-pT single-track high-level trigger\, the an alysis explores the full 2011 PbPb data set corresponding to an integrated luminosity of 150/ub collected by CMS. For the first time\, a long-range correlation structure up to |delta-eta|~4 at small delta-phi (near side) i s observed for such very high-pT (e.g.\, pT~20 GeV/c) trigger particles co rrelated with low-pT (a few GeV/c) associated particles. The observed long -range correlations in |delta-eta| on the near side are consistent with th e single-particle azimuthal anisotropy (characterized by the Fourier harmo nics\, vn) of high-pT trigger particles measured relative to the event-pla ne angle determined with the forward hadronic calorimeters. After subtract ing the vn harmonics component\, the shape and yield on the near (|delta-p hi| 1) side of the residual dihadron correlations have been studied syste matically over a wide kinematic range in trigger (12 \n\nhttp://indico.cer n.ch/contributionDisplay.py?contribId=228&sessionId=4&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=228&sessionId=4 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Dijet asymmetry A_J within a partonic Boltzmann transport model DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-227@cern.ch DESCRIPTION:Speakers: Mr. SENZEL\, Florian (Goethe-Universität Frankfurt) \nRecent experimental data measured in \\sqrt{s}=2.76 TeV Pb+Pb collisions by ATLAS and CMS showed a significant imbalance in the transverse momenta of the two reconstructed jets with the highest transverse momenta. This m omentum imbalance is assumed to be caused by the different energy and mome ntum loss of the di-jets by scatterings within the created medium. To inve stigate this momentum loss we extended the transport model BAMPS which sol ves the full 3+1D Boltzmann equation for partons based on pQCD cross secti ons. One feature of BAMPS is the stochastic modeling of 2 -> 2 as well as 2 3 scattering processes. We show that the simulations of the momentum im balance A_J of full reconstructed jets within BAMPS are in excellent agree ment with the experimental data. Due to the available particle information in configuration as well as momentum space within such a transport model\ , it is possible to reproduce the entire evolution of the reconstructed je ts within the medium and gain a deeper understanding of the emerging jet s hapes. With this information we explain the momentum imbalance of di-jets by different in-medium path lengths and thus different energy and momentum loss at parton-level.\n\nhttp://indico.cern.ch/contributionDisplay.py?con tribId=227&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=227&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Studies of higher-order flow harmonics and factorization of dihadr on correlations in PbPb collisions at 2.76 TeV with CMS DTSTART;VALUE=DATE-TIME:20120817T213000Z DTEND;VALUE=DATE-TIME:20120817T215000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-226@cern.ch DESCRIPTION:Speakers: TUO\, Shengquan (Vanderbilt University (US))\nThe hi gher-order flow anisotropies of charged particles have been systematically studied by the CMS collaboration for PbPb collisions at a nucleon-nucleon center-of-mass energy of 2.76 TeV. The data were collected with the CMS d etector at the LHC in 2010 and 2011. Fourier components of the anisotropic azimuthal distribution\, ranging from the third to the sixth component\, are obtained using four different analysis techniques: event plane\, two- and four-particle correlations\, and Lee-Yang Zeros. The results are repor ted as a function of the particle transverse momentum (pT) for pT = 0.5 - 20 GeV/c and collision centrality. The long-range azimuthal dihadron corre lations are extensively studied with a Fourier-decomposition analysis. Usi ng a data driven method\, the extracted Fourier coefficients (up to the fi fth order) are found to factorize into a product of single-particle azimut hal anisotropies up to pT~3-3.5 GeV/c for at least one particle from each pair\, except for the second-order harmonics in the most central PbPb even ts. Based on the factorization studies\, the implications of flow and non- flow effects in the long-range correlations are discussed. Comparison of h igher-order harmonics derived from different techniques provides important insight on the initial-state eccentricity fluctuations and helps further constrain the transport properties of the medium.\n\nhttp://indico.cern.ch /contributionDisplay.py?contribId=226&sessionId=59&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=226&sessionId=5 9&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Azimuthal anisotropy of charged hadrons at very high pT in PbPb co llisions at 2.76 TeV with CMS DTSTART;VALUE=DATE-TIME:20120814T195500Z DTEND;VALUE=DATE-TIME:20120814T201500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-225@cern.ch DESCRIPTION:Speakers: ZHUKOVA\, Victoria (University of Kansas (US))\nMeas urements of the azimuthal anisotropy of charged hadrons are presented for PbPb collisions at 2.76 TeV over an extended transverse momentum range up to approximately 60 GeV/c. The data were collected with the CMS detector a t the LHC. Utilizing a novel and unique high-pT single-track high-level tr igger\, the analysis explores the full 2011 PbPb data set corresponding to an integrated luminosity of 150/ub. Anisotropy parameters (v2\, v3 and v4 ) are extracted by correlating charged tracks with the event plane angle r econstructed using the energy deposited in the forward calorimeters. By ut ilizing the broad coverage of the CMS foward calorimetry\, contamination f rom back-to-back dijets is suppressed. The results presented in this talk significantly improve on the statistical precision of previous v2 measurem ents for pT> 12 GeV/c\, and explore for the first time the harmonic compon ents of the azimuthal dependence in the very high pT region beyond 20 GeV/ c. Beyond pT>10 GeV/c\, the observed v2 values show a moderate decrease wi th pT\, being consistent with zero only above pT~40 GeV/c and for mid-cent ral (30-60%) collisions. A common trend in the centrality dependence of v2 is observed for particles over a wide range of pT up to approximately 48 GeV/c that is independent of pseudorapditiy\, suggesting a potential conne ction to the initial geometry. These new data can impose quantitative cons traints on the details of in-medium parton energy loss models\, particular ly the influence of the path length and the shape of the interaction regio n.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=225&sessionId =4&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=225&sessionId=4 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Elliptic azimuthal anisotropy of charged hadrons and neutral pions in PbPb collisions at 2.76 TeV with CMS DTSTART;VALUE=DATE-TIME:20120817T182000Z DTEND;VALUE=DATE-TIME:20120817T184000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-221@cern.ch DESCRIPTION:Speakers: APPELT\, Eric Andrew (Vanderbilt University (US))\nT he elliptic flow anisotropies of charged particles and neutral pions (pi0s ) have been measured by the CMS collaboration for PbPb collisions at a nuc leon-nucleon center-of-mass energy of 2.76 TeV. The second Fourier compone nts of the anisotropic azimuthal distribution are obtained using an event- plane technique for pi0s and four different analysis techniques for charge d particles: event plane\, two- and four-particle cumulants\, and Lee-Yang Zeros. These techniques have different sensitivities to non-flow and flow fluctuation effects and their comparison helps disentangle hydrodynamic f low\, initial state fluctuations and non-flow correlations. The results ar e presented as a function of pT\, pseudorapidity\, and centrality. A compa rison of the CMS measurements of v2(pT) from pi0 mesons and inclusive char ged particles reveals a systematic difference in the range of pT = 2.5 ~ 5 GeV/c\, with the neutral pion anisotropies being weaker than those observ ed for inclusive charged particles. This difference indicates a particle-s pecies dependence in the azimuthal anisotropy at the LHC. New measurements of correlations associated with mixed harmonics for charged particles are explored and discussed in terms of participant fluctuations. A systematic comparison of the LHC results to lower energy observations will also be p resented.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=221&se ssionId=26&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=221&sessionId=2 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Jet reconstruction and b-jet identification in PbPb collisions wit h CMS DTSTART;VALUE=DATE-TIME:20120818T135000Z DTEND;VALUE=DATE-TIME:20120818T140000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-220@cern.ch DESCRIPTION:Speakers: ROBLES\, Jorge A (Rutgers\, State Univ. of New Jerse y (US))\nThe flavor dependence of jet quenching is a powerful handle to di scriminate models of parton energy loss in heavy ion collisions. While the re is evidence for a strong energy loss of heavy quarks from single partic le measurements\, heavy flavor tagging of fully reconstructed jets has thu s far not been achieved in heavy ion collisions. In this talk we demonstra te the capacity of CMS to identify jets initiated by bottom quarks using d isplaced vertices reconstructed in the silicon tracking system. Identifica tion of b-jets is shown to be feasible even in the dense environment of Pb Pb collisions. We discuss the status and prospects for measurements of ide ntified b-jets in PbPb collisions with CMS.\n\nhttp://indico.cern.ch/contr ibutionDisplay.py?contribId=220&sessionId=29&confId=181055 LOCATION:Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=220&sessionId=2 9&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Hadronic Calorimetry in sPHENIX at RHIC Upgrade Project DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-391@cern.ch DESCRIPTION:Speakers: Dr. KISTENEV\, Edouard (Brookhaven National Laborato ry)\nThe RHIC physics programs will benefit from developments in hadronic calorimetry. Hadronic calorimetry serves to identify and characterize jets in p+p and A+A collisions and enables studies of the mechanisms of parton ic energy dissipation in the medium at high densities and temperatures. T he sPHENIX detector concept requires development of a hadronic calorimeter with fairly high sampling fraction.\nThe structure under study is a geome trically pointing longitudinally segmented calorimeter built of flat varia ble thickness absorber plates and constant thickness scintillating tiles f orming azimuthal segments with finned structure. We will demonstrate the feasibility of building such a uniform and hermetic hadronic calorimeter a nd discuss concepts for light collection and readout.\n\nhttp://indico.cer n.ch/contributionDisplay.py?contribId=391&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=391&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Study of dynamical net charge fluctuations in Au+Au collisions at \\sqrt{s_{NN}} = 39 GeV at STAR. DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-390@cern.ch DESCRIPTION:Speakers: SHARMA\, Bhanu (Panjab University)\nThe STAR experim ent at Relativistic Heavy Ion Collider (RHIC) investigates the behaviour o f strongly interacting matter at high density and searches for the possibl e formation of Quark Gluon Plasma (QGP). Event-by-event net charge fluctua tion has been proposed as one of the indicators of QGP formation in heavy ion collisions. The fluctuation in net charge depends on the squares of th e charges present in the system\, which depends on the state from which it originates. The system passing through a QGP phase which has quarks as ch arge carriers\, should result in a significantly different net charge fluc tuation as compared to Hadron Gas (HG). The variance of the ratio of posi tive and negative charges scaled by the total charge particle multiplicity (a quantity called D) is approximately 4 times smaller for QGP as compare d to HG [1].\nWe will present preliminary results on net charge fluctuatio ns for Au+Au\ncollisions at \\sqrt{s_{NN}} = 39 GeV and will also present their\ndependence on energy and collision centrality by comparing to the\n published results [2].\n\nhttp://indico.cern.ch/contributionDisplay.py?con tribId=390&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=390&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Event anisotropy v_2 in Au+Au collisions at 7.7 - 62.4 GeV with ST AR DTSTART;VALUE=DATE-TIME:20120817T192000Z DTEND;VALUE=DATE-TIME:20120817T194000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-151@cern.ch DESCRIPTION:Speakers: SHI\, Shusu (CCNU)\nThe exploration of the QCD phase diagram in the region of a possible phase transition between the Quark Gl uon Plasma (QGP) and the hadron gas phase is one of the main goals of the RHIC Beam Energy Scan(BES). One of the most important observables from hig h-energy nuclear collisions to study the early evolution of the expanding system is the elliptic flow $v_{2}$. At the top RHIC energy\, $\\sqrt{s_{N N}}$ = 200 GeV\, the number-of-constituent quark (NCQ) scaling of $v_{2}(p _{T})$ is interpreted as a signature of deconfinement and the formation of the QGP phase. A disappearance of the NCQ scaling is expected for a pure hadronic system at low beam energies. Hence it is a necessary signature to identify the phase transition.\n\nWe present the $v_2$ measurement at mid rapidity from Au+Au collisions at $\\sqrt{s_{NN}}=$ 7.7\, 11.5\, 19.6\, 27 \, 39 and 62.4 GeV for inclusive charged hadrons\, light nuclei ($d$\, $\\ bar{d}$) and identified hadrons ($\\pi^{\\pm}$\, $K^{\\pm}$\, $K_{S}^{0}$\ , $p$\, $\\bar{p}$\, $\\phi$\, $\\Lambda$\, $\\bar{\\Lambda}$\, $\\Xi^{-}$ \, $\\bar{\\Xi}^{+}$\, $\\Omega^{-}$\, $\\bar{\\Omega}^{+}$) up to 4 GeV/$ c$ in $p_{T}$. The beam energy and centrality dependence of charged hadron $v_2$ are presented with comparison to higher energies at RHIC and LHC. T he identified hadron $v_{2}$ are used to discuss the NCQ scaling for diffe rent beam energies. Significant difference in $v_{2}(p_{T})$ is observed b etween particles and corresponding anti-particles for $\\sqrt{s_{NN}} \n\n http://indico.cern.ch/contributionDisplay.py?contribId=151&sessionId=24&co nfId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=151&sessionId=2 4&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Mapping the hydrodynamic response to the initial geometry in heavy -ion collisions DTSTART;VALUE=DATE-TIME:20120817T194000Z DTEND;VALUE=DATE-TIME:20120817T200000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-150@cern.ch DESCRIPTION:Speakers: GARDIM\, Fernando (USP)\nWe investigate how the init ial geometry of a heavy-ion collision is transformed into final flow obser vables by solving event-by-event ideal hydrodynamics with realistic fluctu ating initial conditions. We study quantitatively to what extent anisotro pic flow ($v_n$) is determined by the initial eccentricity $\\varepsilon_n $ for a set of realistic simulations\, and we discuss which definition of $\\varepsilon_n$ gives the best estimator of $v_n$. We find that the comm on practice of using an $r^2$ weight in the definition of $\\varepsilon_n$ in general results in a poorer predictor of $v_n$ than when using $r^n$ w eight\, for $n > 2$. We similarly study the importance of additional pro perties of the initial state. For example\, we show that in order to corr ectly predict $v_4$ and $v_5$ for non-central collisions\, one must take i nto account nonlinear terms proportional to $\\varepsilon_2^2$ and $\\vare psilon_2\\varepsilon_3$\, respectively. We find that it makes no differen ce whether one calculates the eccentricities over a range of rapidity\, or in a single slice at $z=0$\, nor is it important whether one uses an ener gy or entropy density weight. This knowledge will be important for making a more direct link between experimental observables and hydrodynamic initi al conditions\, the latter being poorly constrained at present.\n\nhttp:// indico.cern.ch/contributionDisplay.py?contribId=150&sessionId=26&confId=18 1055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=150&sessionId=2 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Centrality and pT dependence study of Dielectron Production in $\\ sqrt{s_{NN}}$ = 200 GeV Au+Au collisions at STAR DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-153@cern.ch DESCRIPTION:Speakers: ZHAO\, jie (lbl&sinap)\nDilepton production has been proposed to serve as a penetrating probe\nfor the hot and dense medium cr eated in high-energy nuclear collisions.\nTheir small final-state interact ion cross sections\, let dileptons\nescape the interaction region undistor ted. Since dileptons originate\nfrom all stages of a heavy ion reaction\, their sources vary with the\nkinematic phase space under consideration: In the low mass region (LMR:\nmass3 GeV/$c^{2}$)\, heavy quark decays and Dr ell-Yan\nprocesses contribute the most to the dilepton spectrum. Due to th e\ntime-energy correlation\, the higher the dilepton pair mass\, the earli er\nthe production. Therefore the dilepton distributions\, especially in t he\nIMR and HMR\, provide information on early collision dynamics in heavy \nion collisions.\n\n\n In this talk we will present a systematic study o f dielectron production in $\\sqrt{s_{NN}}$ = 200 GeV Au+Au collisions at STAR experiment. The datasets used are nearly one billion Au+Au minibias e vents collected in RHIC runs year 2010 and 2011. The dielectron pair trans verse momentum and centrality dependence of the invariant mass distributio n will be discussed. The results will be compared to hadron decay cocktail s as well as theoretical calculations on vector meson in-medium modificati ons and the QGP thermal radiation.\n\nhttp://indico.cern.ch/contributionDi splay.py?contribId=153&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=153&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Derivation of the medium-induced splitting kernels from Soft Colli near Effective Theory with Glauber gluons DTSTART;VALUE=DATE-TIME:20120817T205000Z DTEND;VALUE=DATE-TIME:20120817T211000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-152@cern.ch DESCRIPTION:Speakers: OVANESYAN\, grigory (LANL)\nWe derive the splitting kernels for partons produced in large Q^2 scattering processes that subseq uently traverse a region of strongly-interacting matter using a recently-d eveloped effective theory Soft Collinear Effective Theory with Glauber Glu ons (SCETG). We include all corrections beyond the small-x approximation\, consistent with the power counting of SCETG. We demonstrate how medium re coil\, geometry\, expansion scenarios\, and phase space cuts can be implem ented numerically for phenomenological applications and quantify the effec t of these uncertainties. We also prove the factorization of the medium-in duced splitting from the hard process that creates the jet. We show that i n the soft gluon approximation our result reduces to the parton energy los s obtained in the framework of the reaction operator approach. This limit is illustrated with an application to inclusive hadron suppression and com parison to the new ALICE and CMS results at the LHC. We discuss ongoing wo rk on obtaining next-to-leading order splitting kernels in the medium and possible applications to heavy ion event generators.\n\nhttp://indico.cern .ch/contributionDisplay.py?contribId=152&sessionId=38&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=152&sessionId=3 8&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Study of hyperon-hyperon correlations and search for the H-dibaryo n with the STAR detector at RHIC DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-155@cern.ch DESCRIPTION:Speakers: Ms. SHAH\, Neha (University of California Los Angele s)\nThe production of large number of multi-strange hyperons per central n ucleus-nucleus collision at RHIC allows us to study hyperon-hyperon intera ctions through measurement of particle correlations and search for exotic particles like dihyperons. In 1977 Jaffe[1] predicted a six quark state\, $H_{0}$-dibaryon\, with hypercharge (Y) = 0 and Strangeness (S) = -2 to be stable against strong decay\, but not to weak decay. It has been proposed that the $H_{0}$ would appear as a bump in the $\\Lambda-\\Lambda$ invari ant mass spectra if the $H_{0}$ is a resonance state\, or it would lead to a depletion of the $\\Lambda-\\Lambda$ correlation near the threshold if the $H_{0}$ is weakly bound\, which can be used to probe whether there is a stable $H_{0}$ or resonance. Considerable experimental efforts have been devoted to search for $H_{0}$. However there is no conclusive experimenta l evidence for a bound $H_{0}$. In addition to $H_{0}$\, many other dihype ron states have been predicted thoeretically. However\, very few measureme nts are available due to low multiplicity of hyperon production in early n uclear collisions. \n\nRecently STAR has collected unprecedented high stat istics data for Au+Au collision at RHIC\, which provides a unique opportun ity to look for the exotic particles and hyperon-hyperon correlations. In this talk\, we will present the measurement of $\\Lambda-\\Lambda$ correla tions for $\\sqrt{s_{NN}}$ = 39-200 GeV in Au+Au collisions using the STAR experiment at RHIC. In addition to that\, we will also present measuremen ts of $\\Lambda-\\bar\\Lambda$\, $\\Lambda-\\Xi^{-}$ correlations for $\\s qrt{s_{NN}}$ = 200 GeV in Au+Au collisions. \n\n[1] R. L. Jaffe\,Phys. Rev . Lett. 38\,195(1977).\n\nhttp://indico.cern.ch/contributionDisplay.py?con tribId=155&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=155&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Investigation of a quark matter in hybrid stars DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-154@cern.ch DESCRIPTION:Speakers: Prof. ENDO\, Tomoki (Division of Physics\, Departmen t of General Education\, Kagawa National College of Technology\, Japan.)\n Quark matter is expected in the core region of neutron stars because of th e central density is sufficiently high for nucleons to dissolve into quar ks. The compact stars consist of not only nuclear matter but also hypeons and quarks\, we call such stars "hybrid stars". However\, the equation of state (EOS) is still not clear and many theoretical studies try to elucida te the EOS in the high density and/or temperature. The crust region of th e stars consist of nucleus and nuclear matter. Therefore the inner region of the stars should have hadron-quark mixed phase. Nowadays it is pointed out that the inner structures would affect macroscopic phenomena of the st ar[1]. However\, the inner structures are strongly depend on EOS of the ma tter. We show that the hadron-quark mixed phase should be restricted to a narrower region because of the finite-size effects and a quark matter regi on should appear in the central region[2]. The narrow region of the mixed phase seems to explain physical phenomena of neutron stars such as the str ong magnetic field and glitch phenomena\, and it would give a new cooling curve for the neutron star.\nReferences:\n[1] A. Kurkela\, P. Romatschke a nd A. Vuorinen\, Phys. Rev. D81\, 105021 (2010)\; arXiv:1006.4062.\n[2] T. Endo\, Phys. Rev. C 83\, 068801 (2011).\n\nhttp://indico.cern.ch/contribu tionDisplay.py?contribId=154&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=154&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Heavy quark production at forward rapidity in d+Au collisions at s qrt(s) = 200 GeV DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-603@cern.ch DESCRIPTION:Speakers: LIM\, Sanghoon (Yonsei University)\nThe measurement of single muons from the semi-leptonic decay of D and B mesons is a well-d eveloped method for the study of heavy quark production at forward rapidit y. Previous PHENIX results from p+p and Cu+Cu collisions at sqrt(s) = 200 GeV have reported the suppression of heavy quark production in central Cu+ Cu collisions at rapidity = 1.65. The measurement of heavy quark productio n at forward rapidity using d+Au data is crucial for the determination of the initial state effects of heavy ion collisions\, leading to an improved understanding of cold nuclear matter effects during the collision. The de tailed status of the analysis will be presented.\n\nhttp://indico.cern.ch/ contributionDisplay.py?contribId=603&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=603&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Beam Energy Dependence of First and Higher-Order Flow Harmonics fr om the STAR Experiment at RHIC DTSTART;VALUE=DATE-TIME:20120814T185500Z DTEND;VALUE=DATE-TIME:20120814T191500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-156@cern.ch DESCRIPTION:Speakers: PANDIT\, Yadav (Kent State University)\nA primary go al of the RHIC Beam Energy Scan (BES) is to search for evidence of a trans ition \nbetween a hadron gas and a Quark Gluon Plasma. The dependence of $ v_{1}$ and higher flow \nharmonics on system size and beam energy may be s ensitive to the degrees of\nfreedom in the system\, as a consequence of ea rly pressure gradients and a potential softening in\nthe equation of state . In this talk\, we present STAR measurements of $v_{1}$ for $\\pi^\\pm$\, $K^\\pm$\,\nprotons and antiprotons along with $v_{n}$ for charged partic les from 7.7 GeV to 200 GeV. A striking observation is that\nthe $v_1$ slo pe $F = dv_1 /dy$ for net protons\, which is an estimate of the directed flow contribution from baryon number transported to the midrapidity region \, changes sign twice within the BES energy range. In contrast\, $F$ for a ll other particle types is negative at all studied energies. For charged p articles\, we observe a local minimum in integrated ($0.2 \n\nhttp://indic o.cern.ch/contributionDisplay.py?contribId=156&sessionId=2&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=156&sessionId=2 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Search for the QCD Critical Point by Higher Moments of Net-proton Multiplicity Distributions at STAR DTSTART;VALUE=DATE-TIME:20120817T213000Z DTEND;VALUE=DATE-TIME:20120817T215000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-158@cern.ch DESCRIPTION:Speakers: Dr. LUO\, Xiaofeng (Central China Normal University) \nOne of the main goals of the RHIC Beam Energy Scan (BES) Program is to s earch for the QCD Critical Point and the phase boundary in the QCD phase d iagram. Higher moments of event-by-event net-proton multiplicity distribut ions have high sensitivity to the correlation length[1]\, and they are dir ectly connected to the susceptibilities in the Lattice Gauge Theory (LGT) calculations and the Hadron Resonance Gas (HRG) model. Therefore\, they ar e ideal tools to search for the QCD critical point[4]\n\nIn this talk\, we will present various moments (variance [σ^2]\, skewness[S] and kurtosis [κ]\, moment products (κσ^2\, Sσ) and intensive normalized cumulants ( ω3 and ω4) of net-proton and total-proton multiplicity distributions mea sured by the STAR detector at RHIC. The moment products (κσ^2\, Sσ) and intensive normalized cumulants are related to the volume independent susc eptibility ratios. The data presented in this talk will include the measur ements of centrality dependence for the net-protons and total-protons from Au+Au collisions at √sNN = 7.7\, 11.5\, 19.6\, 27\, 39\, 62.4 and 200 G eV. These results have been compared with a Poisson baseline. It is observ ed that the moment products (κσ^2\, Sσ) and intensive normalized cumula nts of net-proton distributions in the 0-5% most central Au+Au collisions show significant deviations from the Poisson expectations around √sNN = 19.6 GeV. Those results will be also compared with UrQMD model calculation s.\n\n[1] M. A. Stephanov\, Phys. Rev. Lett. 102\, 032301 (2009)\; Phys. R ev. Lett. 107\, \n052301 (2011)\; C. Athanasiou\, et al.\, Phys. Rev. D 8 2\, 074008 (2010).\n[2] M. Cheng\, et al.\, Phys. Rev. D 79\, 074505 (2009 ). \nR. V. Gavai and S. Gupta\, Phys. Lett. B 696\, 459 (2011).\nS. Gupta\ , X. Luo\, B. Mohanty\, H. G. Ritter\, N. Xu\, Science 332\, 1525 (2011).\ nA. Bazavov\, et al.\, (HotQCD Collaboration)\, arXiv:1203.0784\n[3] F. Ka rsch and K. Redlich\, Phys. Lett. B 695\, 136 (2011).\n[4] M. M. Aggarwal\ , et al.\, (STAR Collaboration)\, Phys. Rev. Lett. 105\, 22302 (2010).\n\n http://indico.cern.ch/contributionDisplay.py?contribId=158&sessionId=57&co nfId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=158&sessionId=5 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Gravitational collapse and holographic thermalization DTSTART;VALUE=DATE-TIME:20120815T141000Z DTEND;VALUE=DATE-TIME:20120815T143000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-609@cern.ch DESCRIPTION:Speakers: CHESLER\, Paul (MIT)\nA remarkable result from heavy ion collisions at the Relativistic Heavy Ion Collider and Large Hadron Co llider is that\, shortly after the collision event\, the quark-gluon plasm a produced behaves as a nearly ideal liquid. Understanding the dynamics responsible for such rapid "hydroization" is a challenge using traditional perturbative field theory. In recent years holography has emerged as a powerful tool to study non-equilibrium phenomena\, mapping the dynamics of certain quantum field theories onto the dynamics of semi-classical gravit y. Via holography\, the production of quark-gluon plasma maps onto the pro cess of gravitational collapse and black hole formation\, with the relaxat ion of the black hole's gravitational field encoding hydroization of the d ual quark gluon plasma. Thermalization of the quark-gluon plasma is encod ed in the thermalization of the black hole's Hawking radiation. I will de scribe several processes which mimic heavy ion collisions and present resu lts for both hydroization and thermalization times and mechanisms.\n\nhttp ://indico.cern.ch/contributionDisplay.py?contribId=609&sessionId=12&confId =181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=609&sessionId=1 2&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Transport Properties of Resonances Gas DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-608@cern.ch DESCRIPTION:Speakers: WIRANATA\, Anton (L)\nIn this work\, we present how shear viscosity and entropy density behave in the Hadronic system as the n umber of Resonances produced are increasing. Shear viscosity is calculated by so called Chapman-Enskog approximation and cross-sections used in this calculation are taken from experiments and UrQMD model. One interesting r esults is we are able to approach the famous 1/4\\pi limit for the ratio o f shear viscosity to entropy density \nas we increases the number of reson ances in the calculation.\n\nhttp://indico.cern.ch/contributionDisplay.py? contribId=608&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=608&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Baryonic resonances at the LHC energies with the ALICE experiment DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-399@cern.ch DESCRIPTION:Speakers: FRAGIACOMO\, Enrico (Universita e INFN (IT))\nThe st udy of resonances production in p-p collisions provides constraints on QCD -inspired particle production models. \nIn Pb-Pb collisions\, resonances a re good probes to estimate the collective properties of the fireball and m ay add constraints to the estimate of its lifetime.\n\n$p_T$ spectra have been measured for the baryonic resonances $\\Lambdastar$\, $\\Sigmastar$ a nd $\\Xistar$ using data collected by the ALICE experiment in p-p collisi ons at $\\sqrt{s} = 7$ TeV. \nThe spectra will be compared to QCD-inspire d models such as PYTHIA and PHOJET\, which in general underpredict the exp erimental results on the yields of strange resonances. The ratios of yield s of baryonic resonances to stable particles\, namely $\\Sigmastar / \\Lam bda$\, $\\Lambdastar / \\Lambda$ and $\\Xistar / \\Xi$ will be compared wi th both thermal models and corresponding values from previous experiments at different colliding energies.\n\nThese results will serve as baseline f or the forthcoming heavy-ion results. The status and prospects of the meas urements of baryonic resonances in Pb-Pb collisions at $\\sqrt{s_{NN}} = 2 .76$ TeV will be discussed.\n\nhttp://indico.cern.ch/contributionDisplay.p y?contribId=399&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=399&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Theta vacuum and entanglement interaction in the three-flavor Pol yakov-loop extended Nambu-Jona-Lasinio model DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-398@cern.ch DESCRIPTION:Speakers: SASAKI\, Takahiro (K)\nWe investigate theta-vacuum e ffects on the QCD phase diagram for the realistic 2+1 flavor system\, usi ng the three-flavor Polyakov-extended Nambu-Jona-Lasinio (PNJL) model and the entanglement PNJL model as an extension of the PNJL model. The theta- vacuum effects make the chiral transition sharper. For large theta-vacuum angle the chiral transition becomes first order even if the quark number chemical potential is zero\, when the entanglement coupling between the ch iral condensate and the Polyakov loop is taken into account.We finally pr opose a way of circumventing the sign problem on lattice QCD with finite theta.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=398&sessi onId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=398&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:New relativistic dissipative fluid dynamics from kinetic theory DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-48@cern.ch DESCRIPTION:Speakers: JAISWAL\, Amaresh (Tata Institute of Fundamental res earch\, Mumbai)\nStarting with the relativistic Boltzmann equation where t he collision term is generalized to include nonlocal effects\, and using G rad's 14-moment approximation for the single-particle distribution functio n\, we derive equations for the relativistic dissipative fluid dynamics. W e compare them with the corresponding equations obtained in the standard I srael-Stewart and related approaches. Our method generates all the second- order terms that are allowed by symmetry\, some of which have been missed by the traditional approaches\, and the coefficients of other terms are al tered. The first-order or Navier-Stokes equations too get modified. Signif icance of these findings is demonstrated in the framework of one-dimension al Bjorken scaling expansion of the matter formed in relativistic heavy-io n collisions.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=48 &sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=48&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Temperature dependence of the shear viscosity in the semi-QGP DTSTART;VALUE=DATE-TIME:20120816T194000Z DTEND;VALUE=DATE-TIME:20120816T200000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-49@cern.ch DESCRIPTION:Speakers: Dr. PISARSKI\, Robert (Brookhaven National Lab.)\nAn effective theory for the region near the critical temperature\, the "semi "-QGP\, has been developed. In QCD\, this is dominated by the partial ion ization of color\, up to temperatures about 300 MeV. Using the effective model\, the temperature dependence for the ratio of the shear viscosity\, to the entropy\, is computed. This predicts a sharp increase in this rati o between ~ 160 MeV and ~ 300 MeV.\n\nhttp://indico.cern.ch/contributionDi splay.py?contribId=49&sessionId=18&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=49&sessionId=18 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Response of QGP to two hard partons DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-46@cern.ch DESCRIPTION:Speakers: SCHULC\, Martin (Czech Technical University (CZ))\nW e perform (3+1)-dimensional ideal hydrodynamic calculation with source ter ms that describe energy and momentum deposition of hard partons in static quark-gluon plasma and study not only QGP response to one parton\, but als o interplay of perturbations due to two leading particles propagating in v arious directions. Energy deposition is described by a simple Bethe-Bloch model which leads to an explosive burst of energy and momentum at the end of the trajectory of the parton. Dependence of the response on the equatio n of state is also discussed. The pairs of hard partons induce flow of ene rgy and momentum density in medium which depend on initial directions of t he partons.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=46&s essionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=46&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:HEAVY QUARKONIA IN MEDIUM AS OPEN QUANTUM DISSIPATIVE SYSTEM\, A W AVE FUNCTION BASED APPROACH DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-47@cern.ch DESCRIPTION:Speakers: Mr. DUTTA\, Nirupam (Doctoral Student\, Bielefeld Un iversity)\nIn static picture a quarkonium bound state in deconfined medium is either completely dissociated above some threshold temperature or just stays in the specific state below the threshold. In contrast\, some rece nt studies suggest that the static quark antiquark potential for describin g bound quarkonia should include an imaginary part. This shows a finite l ife time of the bound state in the medium and initiate a quest for dynamic al picture of the dissociation. The dynamical picture becomes more relevan t when the medium is expanding and cooling down rapidly\, as in the case o f heavy ion collision. A possible general framework for this dynamics is t o view the quarkonia as an open system. We have designed a novel approach\ , based on the wave function\, to address the real time dynamics of heavy quarkonia in medium (thermally equilibrated or not) produced in heavy ion collision.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=47&se ssionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=47&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Fourth order corrections to the MV model\, multiplicity distributi ons and KNO scaling DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-44@cern.ch DESCRIPTION:Speakers: PETRESKA\, Elena (Graduate Center/Baruch College CUN Y)\nA scaling law for the multiplicity distribution in high-energy hadroni c collisions has been proposed by Koba\, Nielsen\, and Olesen (KNO). Exper iments at the LHC observed that multiplicities in the central region of pr oton-proton collisions follow a negative binomial distribution and that th ey do exhibit KNO scaling. The negative binomial distribution has been the oretically reproduced in the Color Glass Condensate (CGC) formalism with a Gaussian (McLerran-Venugopalan) action. We derive corrections to the MV m odel up to fourth order in the density of color charges (rho^4) and invest igate their implication on the multiplicity distribution and on KNO scalin g. We find that KNO scaling constrains the deviation of the small-x effect ive action from a Gaussian.\n\nhttp://indico.cern.ch/contributionDisplay.p y?contribId=44&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=44&sessionId=37 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Understanding LHC jets in the light of RHIC data DTSTART;VALUE=DATE-TIME:20120815T123000Z DTEND;VALUE=DATE-TIME:20120815T125000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-45@cern.ch DESCRIPTION:Speakers: RENK\, Thorsten (University of Jyväskylä)\nHard pr obes are a cornerstone in the ongoing program to determine the properties of hot and dense QCD matter as created in ultrarelativistic heavy ion coll isions. The first two runs at the LHC have resulted in a wealth of measure ments of both reconstructed jets and single inclusive high P_T hadrons\, o pening new kinematic windows and offering high statistics. Yet on first gl ance\, several observations are counter-intuitive and seem to contradict r esults from the RHIC high P_T program. I present a combined analysis of hi gh P_T hadronic observables at RHIC and LHC and reconstructed jets at LHC in a framework testing a large number of theoretical models for both mediu m evolution and shower medium interactions against the systematics of the data. I demonstrate how a consistent picture of shower-medium interaction emerges from the combined results and explain where and why results appear counter-intuitive. In particular\, I discuss the role of jet measurements in constraining models critically and suggest measurements sensitive to t he gaps in our knowledge.\n\nhttp://indico.cern.ch/contributionDisplay.py? contribId=45&sessionId=11&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=45&sessionId=11 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:A New Mechanism for Generating a Single Transverse Spin Asymmetry DTSTART;VALUE=DATE-TIME:20120817T182000Z DTEND;VALUE=DATE-TIME:20120817T184000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-43@cern.ch DESCRIPTION:Speakers: Mr. SIEVERT\, Matthew (The Ohio State University)\nW e propose a new mechanism for generating a single transverse spin \nasymme try (STSA) in polarized proton-proton and proton-nucleus collisions in the high-energy scattering approximation. In this framework the STSA originat es from the q -> q G splitting in the projectile (proton) light-cone wave function followed by a perturbative (C-odd) odderon interaction\, togethe r with a C-even interaction\, between the projectile and the target. We sh ow that the obtained expression for the STSA of the produced quarks is in qualitative agreement with experiment: STSA decreases with decreasing proj ectile x_F and is a non-monotonic function of the transverse momentum k_T\ , peaking near the saturation scale Q_s in our framework. Our mechanism pr edicts that the quark STSA in proton--nucleus collisions should be much sm aller than in proton--proton collisions. We also observe that in our forma lism the STSA for prompt photons is zero.\n\nhttp://indico.cern.ch/contrib utionDisplay.py?contribId=43&sessionId=36&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=43&sessionId=36 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:The effect of initial fluctuations on jet quenching DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-465@cern.ch DESCRIPTION:Speakers: Dr. ZHANG\, Hanzhong (Institute of Particle Physics\ , Central China Normal University)\nThe effect of initial fluctuations on partonic jet energy loss in a hydrodynamical background in high-energy hea vy-ion collisions is studied within a next-to-leading order (NLO) perturba tive QCD\nparton model. An energetic parton jet is found to lose more ener gy loss with fluctuating initial conditions than that with smooth initial conditions due to initial dominative positive correlation between the fluc tuation of the production probability of the initial parton jet and the fl uctuation of the local medium density in the jet trajectory. The deviation between the nuclear modification factors with fluctuating initial conditi ons and smooth initial conditions in non-central A+A collisions is found g reater than in central A+A collisions. Particularly\, the jet energy loss with linear path-length dependence is found to encounter more stronger flu ctuation effect than with quadratic path-length dependence.\n\nhttp://indi co.cern.ch/contributionDisplay.py?contribId=465&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=465&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Non-linear QCD dynamics in photon-photon interactions at high ener gies DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-5@cern.ch DESCRIPTION:Speakers: CAZAROTO\, Erike (University of Sao Paulo)\nAt high energies the amount of gluons in a hadron is much larger than the amount o f any other constituent\, for example it is much larger than the amount of sea quarks. Therefore\, at high energies the hadronic cross sections are basically a function only of the gluons distribution. The color dipole for malism applied to photon-photon collisions implies that\, before interacti ng\, each of the photons fluctuates in a pair quark-antiquark with a certa in probability. The pair is colorless and it is also called Color Dipole. In a first approximation we can treat one of the pairs quark-antiquark as if it was a hadron and we can apply the evolution equations of QCD to dete rmine its gluons distribution. Then the photon-photon cross section can be factorized as a product of two terms. The first one is the probabilities for each photon fluctuate in a color dipole and the second term is the dip ole-hadron cross section. In order to determine the dipole-hadron scatteri ng amplitude we used non-linear QCD dynamics. The non-linearity of the evo lution equations implies that the gluons distribution inside the hadron sa turates when a given kinematic regime is reached. The scale separating the saturation regime of the linear one is called Saturation Scale. When the saturation regime is reached it is expected that the gluons distribution f orm a new state of matter\, the called Color Glass Condensate (CGC). The s earch for the CGC is still going on and it is expected that LHC\, as well as the future eRHIC\, will give us a definitive answer of its existence. I n this work we applied the CGC approach to photon-photon collisions throug h the color dipole formalism. We calculated cross sections to photon-photo n scattering and calculated structure functions of virtual and real photon s. We proposed a new model to the dipole-dipole cross section and compared our results with a model available in the literature. Our calculations ca n be considered as predictions to observables that will be measured in a f uture linear collider.\n\nhttp://indico.cern.ch/contributionDisplay.py?con tribId=5&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=5&sessionId=37& confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:J/Psi suppression in high multiplicity proton-proton collisions at LHC energies DTSTART;VALUE=DATE-TIME:20120816T200000Z DTEND;VALUE=DATE-TIME:20120816T220000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-464@cern.ch DESCRIPTION:Speakers: LANG\, Thomas ()\nWe study charmonium physics in hea vy-ion collisions within the framework\nof the non-equilibrium transport m odel UrQMD at SPS\, RHIC and LHC energies.\nFor pp collisions at LHC energ ies we find a considerable J/Psi suppression\nin dependence of the particl e multiplicity.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId= 464&sessionId=37&confId=181055 LOCATION: Regency 1/3 and Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=464&sessionId=3 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of dipole flow associated with initial geometry fluctu ations in Pb-Pb collisions with the ATLAS detector DTSTART;VALUE=DATE-TIME:20120815T152000Z DTEND;VALUE=DATE-TIME:20120815T154000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-488@cern.ch DESCRIPTION:Speakers: JIA\, Jiangyong (Brookhaven National Laboratory (BNL )-Unknown-Unknown)\nA study of the dipole flow (v_1) associated with initi al geometry fluctuations is presented using the 2010 Pb-Pb data. This anal ysis involves a systematic decomposition of the first order Fourier coeffi cient of the two-particle correlation into a dipole flow component and a g lobal momentum conservation component. The dipolar flow is extracted as fu nction of pT (0.5-10 GeV)\, centrality (0-50%) and pseudorapidity (|eta|\n \nhttp://indico.cern.ch/contributionDisplay.py?contribId=488&sessionId=51& confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=488&sessionId=5 1&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of elliptic and higher-order harmonics at 2.76 TeV Pb- Pb collisions with the ATLAS detector DTSTART;VALUE=DATE-TIME:20120814T204500Z DTEND;VALUE=DATE-TIME:20120814T210500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-487@cern.ch DESCRIPTION:Speakers: DERENDARZ\, Dominik Karol (Polish Academy of Science s (PL))\nAnisotropy coefficients v_n are important observables for studyin g the hot\, dense medium created in heavy ion collisions. They not only pr obe the collective flow of the bulk medium (at pT\n\nhttp://indico.cern.ch /contributionDisplay.py?contribId=487&sessionId=47&confId=181055 LOCATION: Regency 2/3 URL:http://indico.cern.ch/contributionDisplay.py?contribId=487&sessionId=4 7&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of event plane correlations in Pb-Pb collisions with t he ATLAS detector DTSTART;VALUE=DATE-TIME:20120817T205000Z DTEND;VALUE=DATE-TIME:20120817T211000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-486@cern.ch DESCRIPTION:Speakers: MOHAPATRA\, Soumya (State University of New York (US ))\nRecently harmonic flow coefficients v_1-v_6 have been measured in heav y-ion collisions at LHC. The magnitude of these coefficients and their cen trality dependence suggest that they are associated with the various shape components in the initial geometry\, arising from fluctuations of the par ticipating nucleons in the overlap region. The orientation of these harmon ic flow (event plane or Psi_n) are generally correlated due to the correla tions between the original shape components in the initial geometry\; the correlations between event plane can also be generated dynamically during the hydrodynamic evolution of the medium. We present first measurements of various event plane correlations involving Psi_2 to Psi_6 in Pb-Pb collis ions at the LHC. The large detector acceptance of ATLAS\, i.e. calorimeter covering -5\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=486 &sessionId=59&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=486&sessionId=5 9&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurements of flow harmonics with the cumulant method from the A TLAS experiment DTSTART;VALUE=DATE-TIME:20120817T184000Z DTEND;VALUE=DATE-TIME:20120817T190000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-484@cern.ch DESCRIPTION:Speakers: BOLD\, Tomasz (AGH Univ. of Science amp\; Technology \, Krakow)\nThe measurement of the azimuthal anisotropy of charged particl es obtained with the multi-particle correlations method will be presented and compared to the results obtained with the event plane method for Pb+Pb collisions at 2.76 TeV from the ATLAS experiment. Results on flow harmoni cs\, determined from the cumulants of up to eight-particle correlations\, will be shown over a wide transverse momentum\, 0.5\n\nhttp://indico.cern. ch/contributionDisplay.py?contribId=484&sessionId=26&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=484&sessionId=2 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of muon tagged b-jet production in Pb+Pb collisions at 2.76 TeV with the ATLAS detector at the LHC DTSTART;VALUE=DATE-TIME:20120817T211000Z DTEND;VALUE=DATE-TIME:20120817T213000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-483@cern.ch DESCRIPTION:Speakers: PEREPELITSA\, Dennis (Columbia University)\nBottom q uark is a very important probe to study the hot\, dense medium produced in the heavy ion collisions. Bottom quark is produced at the relatively earl y stage of the nucleus-nucleus collisions and may have a small gluon radia tion due to a suppression of small angle gluon radiation `dead cone effect ’. Because the heavy mass of b-hadrons\, muons from semi-leptonic b-hadr on decays tend to have larger angle with respect to the jet axis. This inf ormation can be used to tag b-jets. Specifically\, the transverse momentum of the muon with respect to the b-jet axis\, pT^{rel}\, is used to differ entiate b-jets from the background charm and light quark jets. In this tal k\, we present the b-jet suppression R_CP\, which is defined as the ratio of the average N_coll scaled yield in central collisions to that in periph eral collisions (60-80%)\, as a function of the muon momentum\, jet moment um and the number of participants average N_part in Pb+Pb collisions at 2.76 TeV. The result is also compared with the inclusive heavy flavor supp ression\, which was obtained by studying single muons decayed semi-leptoni cally from the from the b- and c-quark containing hadrons.\n\nhttp://indic o.cern.ch/contributionDisplay.py?contribId=483&sessionId=56&confId=181055 LOCATION: Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=483&sessionId=5 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurements of jet suppression with ATLAS DTSTART;VALUE=DATE-TIME:20120814T210500Z DTEND;VALUE=DATE-TIME:20120814T212500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-480@cern.ch DESCRIPTION:Speakers: ANGERAMI\, Aaron Richard (Columbia University (US))\ nThe energy loss of high-pt partons through the phenomenon of jet quenchin g provides insight into the transport properties of the medium created in relativistic heavy ion collisions. Evidence for this energy loss was first experimentally established through observation of high-pt hadron suppress ion at RHIC. This observable is not ideal for detailed quenching measureme nts as the final state hadrons are only relatable to the jet through the f ragmentation. More recently\, measurements of fully reconstructed jets hav e been performed at the LHC. This talk presents the latest experimental re sults from the ATLAS collaboration on jet suppression. These results estab lish qualitative features of the jet quenching mechanism as experimental f act and provide constraints on models of jet energy loss.\n\nhttp://indico .cern.ch/contributionDisplay.py?contribId=480&sessionId=48&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=480&sessionId=4 8&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:J/psi production at mid-rapidity in Pb-Pb collisions at 2.76 TeV DTSTART;VALUE=DATE-TIME:20120814T212500Z DTEND;VALUE=DATE-TIME:20120814T214500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-472@cern.ch DESCRIPTION:Speakers: ARSENE\, Ionut Cristian (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))\nThe hot and dense nuclear matter created in nuclear collisions at relativistic energies consists of a plasma of dec onfined quarks and gluons. Due to their large mass\, the charm quarks are mainly formed in the first instants of the nuclear collision and will cons equently experience the full history of the system. It was predicted that the strongly bound J/Ã state will be suppressed in the hot and deconfined quark-gluon plasma due to the color screening effect. This effect was alr eady observed in Au-Au collisions at sqrt(s_NN) = 200 GeV at RHIC. It was also predicted that high production yields of charm quarks in nucleus-nucl eus collisions at RHIC and especially at LHC energies will make possible ( re)combination thus possibly leading to J/psi enhancement compared to lowe r energy nuclear collisions and to pp collisions.\nALICE measures the J/ps i at mid-rapidity\, |y| \n\nhttp://indico.cern.ch/contributionDisplay.py?c ontribId=472&sessionId=50&confId=181055 LOCATION: Empire URL:http://indico.cern.ch/contributionDisplay.py?contribId=472&sessionId=5 0&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Elliptic flow of J/psi at forward rapidity in Pb-Pb Collisions a t 2.76 TeV with the ALICE experiment DTSTART;VALUE=DATE-TIME:20120817T213000Z DTEND;VALUE=DATE-TIME:20120817T215000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-473@cern.ch DESCRIPTION:Speakers: YANG\, Hongyan (CEA - Centre d'Etudes de Saclay (FR) )\nCharmonium production in heavy ion collisions has been studied at diff\ n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=473&sessionId=56 &confId=181055 LOCATION: Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=473&sessionId=5 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of the nuclear modification factor and v2 of electrons from heavy flavour decays in Pb-Pb collisions at 2.76 TeV with ALICE DTSTART;VALUE=DATE-TIME:20120817T203000Z DTEND;VALUE=DATE-TIME:20120817T205000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-470@cern.ch DESCRIPTION:Speakers: SAKAI\, Shingo (Lawrence Berkeley National Lab. (US) )\nIn heavy-ion collisions\, charm and beauty (heavy flavour) quarks are p roduced primarily in the initial\, hard partonic interactions. They succes sively interact with the hot and dense Quark-Gluon Plasma (QGP) expected t o be formed in such collisions. Therefore\, measurements of heavy flavour production provide relevant information on the properties of the QGP.\nThi s talk presents measurements by the ALICE Collaboration of electrons from heavy flavour decays at central rapidity in Pb-Pb collisions at $\\sqrt{s_ {NN}}$ = 2.76 TeV. Electrons are identified using several detectors of the ALICE central barrel. \nElectrons from beauty decays are separated based on their displacement from the interaction vertex. The nuclear modificatio n factor of inclusive electrons from heavy flavour decays and of electrons from beauty decays\, as a function of transverse momentum and collision c entrality\, will be presented.\n\nhttp://indico.cern.ch/contributionDispla y.py?contribId=470&sessionId=56&confId=181055 LOCATION: Ambassador URL:http://indico.cern.ch/contributionDisplay.py?contribId=470&sessionId=5 6&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of isolated direct photons in lead-lead collisions at 2.76 TeV with the ATLAS detector DTSTART;VALUE=DATE-TIME:20120815T150000Z DTEND;VALUE=DATE-TIME:20120815T152000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-476@cern.ch DESCRIPTION:Speakers: GRABOWSKA-BOLD\, Iwona (AGH Univesity of Science and Technology (PL))\nDirect photons are a powerful tool to study heavy ion collisions. Their production rates provide access to the initial state PDF s\, which are expected to be modified by nuclear effects. They also provid e a means to calibrate the expected energy of jets that are produced in th e medium\, and thus are a tool to probe the physics of jet quenching more precisely both through jet rates and fragmentation properties. The ATLAS d etector measures photons with its hermetic\, longitudinally segmented calo rimeter\, which gives excellent spatial and energy resolution\, and detail ed information about the shower shape of each measured photon. This gives powerful rejection against the expected background from neutral pions comi ng from jets. Rejection against jet fragmentation products is further enha nced by isolation criteria\, which can be based on calorimeter energy or t he presence of high pT tracks. First results on the rates of isolated dire ct photons from approximately 140 µb-1 of lead-lead data will be shown\, as a function of transverse momentum\, pseudorapidity and centrality\, and their rates compared to expectations from perturbative QCD.\n\nhttp://ind ico.cern.ch/contributionDisplay.py?contribId=476&sessionId=53&confId=18105 5 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=476&sessionId=5 3&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Measurements of W and Z boson production in Pb+Pb collisions at 2. 76 TeV with the ATLAS detector. DTSTART;VALUE=DATE-TIME:20120815T154000Z DTEND;VALUE=DATE-TIME:20120815T160000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-474@cern.ch DESCRIPTION:Speakers: DOLEJSI\, Jiri (Charles University (CZ))\nCollisions of lead nuclei at the LHC allow study of the deconfined phase of QCD matt er at unparalleled temperatures and energy densities. The use of leptonic observables is particularly appealing as a consequence of their electrowea k nature\, allowing them to traverse the strongly-coupled medium essential ly unaffected. W and Z bosons\, observed through their semi-leptonic decay channels\, may serve as a proxy for investigating phenomenological proces ses associated with particle interactions in the QCD medium as well as exp loring hitherto unattainable regions of nuclear PDFs. The yields of these bosons in heavy ion collisions can be used for sensitive tests of binary scaling. This presentation will describe measurements of the W boson using single muon decay\, and measurements of Z->ee and Z->mumu\, both performe d with nearly 150 ub-1 of collision data collected at a center-of-mass ene rgy per nucleon pair sqrt(s_NN)=2.76 TeV with the ATLAS detector during th e 2011 heavy ion run.\n\nhttp://indico.cern.ch/contributionDisplay.py?cont ribId=474&sessionId=53&confId=181055 LOCATION: Diplomat URL:http://indico.cern.ch/contributionDisplay.py?contribId=474&sessionId=5 3&confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Study of correlations between neutral bosons and jets in lead-lead collisions at 2.76 TeV with the ATLAS detector DTSTART;VALUE=DATE-TIME:20120814T183500Z DTEND;VALUE=DATE-TIME:20120814T185500Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-478@cern.ch DESCRIPTION:Speakers: CITRON\, Zvi (Weizmann Institute of Science (IL))\nT he correlations of jets with neutral bosons is a particularly powerful too l to probe the underlying physics of jet quenching. To gain insight into the physics of this process we can study Z-jet and gamma-jet correlations. Because the Z and photons do not directly couple to the strong force\, in a jet+boson event the unmodified bosons allow us to access the modificati on of the opposite side jet\; unlike dijet events\, where both jets potent ially lose energy\, these bosons provide an excellent calibration of the e nergy of the recoil jet. The jets are measured in the same calorimeter\, o ver a range of jet radii\, and benefit from the detailed information about the shower profile. The ATLAS experiment has measured jet correlations wi th both direct photons as well as with Z bosons via dilepton channels in P b+Pb collisions with sqrt(s_NN)=2.76 TeV in a data sample of nearly 150 ub ^-1 of integrated luminosity. The measurement of these correlations will b e presented.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=478 &sessionId=3&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=478&sessionId=3 &confId=181055 END:VEVENT BEGIN:VEVENT SUMMARY:Jet fragmentation and jet properties in 2.76 TeV Pb+Pb collisions using the ATLAS Detector at LHC DTSTART;VALUE=DATE-TIME:20120815T133000Z DTEND;VALUE=DATE-TIME:20120815T135000Z DTSTAMP;VALUE=DATE-TIME:20130521T110306Z UID:indico-contribution-181055-479@cern.ch DESCRIPTION:Speakers: RYBAR\, Martin (Charles University (CZ))\nThe recent measurements of jet suppression at LHC indicate a presence of "jet quench ing" -- strong energy loss of energetic jets in hot and dense QCD medium w hich has been already observed at RHIC experiments. We present a measureme nt of jet properties which sheds more light on the mechanism of jet energy loss. We will discuss the results of measurement of longitudinal\, and tr ansverse structure of jets\, as well as the spectra\, and multiplicities o f charged particles constituting jets. The measurement has been performed using 158 ub^-1 of lead-lead collision data provided at a nucleon center-o f-mass energy of 2.76 GeV by the Large Hadron Collider and collected by th e ATLAS Detector during November and December 2011.\n\nhttp://indico.cern. ch/contributionDisplay.py?contribId=479&sessionId=11&confId=181055 LOCATION: Palladian URL:http://indico.cern.ch/contributionDisplay.py?contribId=479&sessionId=1 1&confId=181055 END:VEVENT END:VCALENDAR