Helen Louise Caines
(Yale University (US))
22/07/2013, 10:00
Talk
Marcus Bleicher
(Uni Frankfurt)
22/07/2013, 10:20
Talk
Boris Hippolyte
(Institut Pluridisciplinaire Hubert Curien (FR))
22/07/2013, 11:30
Talk
Francesco Becattini
(Unversity of Florence)
22/07/2013, 12:05
Talk
Mateusz Ploskon
(Lawrence Berkeley National Lab. (US))
22/07/2013, 14:20
Talk
Xianglei Zhu
(Tsinghua University)
22/07/2013, 14:50
Talk
Strange hadron productions are sensitive probes to the dynamics of the hot and
dense matter created in heavy-ion collisions. In this talk, we will present the recent
STAR measurements on the production of various strange hadrons (K0s, phi, Lambda,
Xi and Omega) in $\sqrt{S_{NN}}$ = 7.7 - 39 GeV Au+Au collisions in the STAR beam
energy scan program. We will investigate the collision...
Ron Belmont
(University of Michigan, Wayne State University)
22/07/2013, 15:20
Talk
PHENIX has recently reported[arXiv:1304.3410] measurements of identified charged hadron spectra and ratios in Au+Au and d+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. Identified hadrons are an important probe of both hot and cold nuclear matter. The intermediate $p_T$ region, 2 -5~GeV/c, is of particular interest. In Au+Au collisions, the production of mesons is suppressed in this $p_T$ region...
Lee Stuart Barnby
(University of Birmingham (GB))
22/07/2013, 15:50
Talk
Raphael Granier De Cassagnac
(Ecole Polytechnique (FR))
22/07/2013, 16:50
Talk
Ramona Vogt
(LLNL)
22/07/2013, 17:25
Talk
Dr
Giuseppe Bruno
(Universita e INFN (IT))
23/07/2013, 09:00
Talk
Daniel Kikola
(Warsaw University of Technology)
23/07/2013, 09:30
Talk
Heavy quarks are produced early in the heavy-ion collisions and they
are expected to interact differently from light quarks with the Quark
Gluon Plasma (QGP); therefore, they are unique probes of the QGP
properties. Moreover, their production and elliptic flow are sensitive
to the medium dynamics. These measurements for open heavy flavour
sector are crucial for understanding the parton...
Mr
Denis Jouan
(IPN CNRS/IN2P3)
23/07/2013, 10:00
Talk
Heavy quarks and quarkonia are mostly produced in the first steps of a collision, and then are sensitive to the whole evolution of the system, and in particular to the initial stage, which makes also of the heavy quarkonia an excellent probe of the quark gluon plasma formation in heavy ion collisions. Other effects also occur, such as partonic distributions modification in cold nuclear...
Diego Stocco
(Laboratoire de Physique Subatomique et des Technologies Associe)
23/07/2013, 11:00
Talk
Mihee Jo
(Korea University (KR)),
The CMS Collaboration
(CMS)
23/07/2013, 11:30
Talk
The Compact Muon Solenoid (CMS) is fully equipped to measure quarkonia in the di-muon decay channel in the high multiplicity environment of nucleus-nucleus collisions. Quarkonia are especially relevant for studying the quark-gluon plasma since they are produced at early times and propagate through the medium, mapping its evolution. CMS has measured the nuclear modification factors of...
Klaus Werner
(SUBATECH)
23/07/2013, 12:00
Talk
You Zhou
(NIKHEF and Utrecht University (NL))
23/07/2013, 14:00
Talk
Anisotropic flow is an important observable to study the properties and the evolution of the system created in heavy-ion collisions. We present measurements of anisotropic flow of strange and multi-strange particles, including Ks, Λ, Ξ, Ω and φ, in Pb–Pb collisions at \sqrt{s_{NN}} = 2.76 TeV recorded with the ALICE detector. The results are compared to hydrodynamic model calculations,...
Dr
Pornrad Srisawad
(Department of Physics, Faculty of Science, Naresuan University, 65000 Phitsanulok Thailand)
23/07/2013, 14:00
The inclusive cross section, polar angle distribution and the direct transverse momentum of K+ mesons in C + C, Ni + Ni and Au + Au collisions at incident energies from 0.6 to 2.0 A GeV are studied using the Quantum Molecular Dynamics model based on the covariant kaon dynamics, and compared with the KaoS data of GSI. The calculated K+ yields consist with experiment data for a soft and hard...
Herbert Stroebele
(Johann-Wolfgang-Goethe Univ. (DE))
23/07/2013, 14:00
Talk
The NA49 collaboration measured the rapidity and
transverse mass distributions of kaons and pions in
Pb+Pb collisions at different centralities. These data are
complemented by results from the small systems C+C
and Si+Si. We find that the centrality dependence of
kaon and pion production is reproduced by microscopic
transport model calculations (HSD and UrQMD2.3)
within 20% or better....
Giorgio Torrieri
(JW Goethe Universitat, Frankfurt)
23/07/2013, 14:20
I will discuss the phase structure of matter at moderate temperature
and chemical potential, relevant for the lower energy runs at RHIC as
well as the upcoming experiments of NICA and FAIR.
Motivated by large Nc physics, I will argue that the non-perturbative structure of QCD can give rise to hitherto little explored phenomena, such as the coexistence of confinement with perturbative quark...
Adam Trzupek
(Henryk Niewodniczanski Inst. Nucl. Physics, PAN)
23/07/2013, 14:20
Talk
ATLAS has performed a detailed measurement of event-by-event flow in
lead-lead collisions at the LHC. The Fourier coefficients, v2-v4, of the
azimuthal angle distribution of charged particles measured in the
ATLAS inner detector (|eta| < 2.5) are extracted in each of 48 million
minimum-bias Pb+Pb collisions. The v2-v4 distributions are measured for a
variety of centrality intervals over...
Dr
Zoltan Fodor
(Hungarian Academy of Sciences (HU))
23/07/2013, 14:20
Talk
Present status and recent results shall be presented from the NA61/SHINE experiment at the CERN SPS. The physics program is concentrated along heavy-ion physics and the study of hadron production in p+p and h+A collisions. The heavy-ion program mostly address the study of onset of deconfinement and search for the critical point of the strongly interacting matter, while the p+p and h+A program...
Marek Chojnacki
(University of Copenhagen (DK))
23/07/2013, 14:40
Talk
The ALICE detector features multiple particle identification systems including: the Time Projection Chamber (TPC), the Inner Tracking System (ITS), a time-of-flight system (TOF) and a Ring-imaging Cherenkov detector (HMPID).
This combination of detectors along with the excellent tracking capabilities of ALICE provides us with the opportunity to measure the production of pi/K/p over a broad...
Elena Bratkovskaya
(FIAS)
23/07/2013, 14:40
We study the equilibrium properties of strongly-interacting infinite
parton-hadron matter and the non-equilibrium dynamics of heavy-ion
collisions from SIS to LHC energies within the Parton-Hadron-String
Dynamics (PHSD) transport approach, which incorporates explicit
partonic degrees of freedom in terms of strongly interacting
quasiparticles (quarks and gluons) in line with an equation of...
Radoslaw Ryblewski
(Institute of Nuclear Physics PAS)
23/07/2013, 14:40
Talk
At first, we exactly solve the relaxation-time approximation Boltzmann equation for a system which is transversely homogeneous and undergoing boost-invariant longitudinal expansion. We compare the resulting exact numerical solution with approximate solutions available in the anisotropic hydrodynamics and second order viscous hydrodynamics frameworks. In all cases studied, we find that the...
Prof.
Jun Takahashi
(UNICAMP)
23/07/2013, 15:00
Talk
The study of the transverse momentum anisotropy of the particles produced in heavy ion collisions is one of the most important experimental observable to investigate the collective behavior of the systems created in such collisions. Recent studies show that the complexity of the nature of the system evolution, such as initial condition fluctuations and jets, may lead to important effects in...
Robert Vertesi
(Nuclear Physics Institute of the Czech Academy of Sciences)
23/07/2013, 15:00
Talk
Three-dimensional source extraction techniques allow us to get an
insight to the space-time extent and the freezeout dynamics of the hot and dense medium created in RHIC high energy heavy ion collisions, using Bose-Einstein correlated like-sign hadron pairs. Three-dimensional analyses of the pion source revealed a heavy, non-Gaussian tail in the "out" direction. The interpretation of these...
Jia-Chii Berger-Chen
(Technische Universitaet Muenchen (DE))
23/07/2013, 15:00
Since the recent discovery of a massive neutron star of about 1.97 solar masses [1] the discussion about a possible existence of a condensed kaon matter inside the neutron star has been revived [2,3]. Kaons not only influence the nuclear EOS [1,2], but also play an important role for the cooling process of a neutron star [4]. Thus a better understanding of the kaon nucleon/nucleus interaction...
Mohammed Younus
(Variable Energy Cyclotron Centre)
23/07/2013, 15:20
Charm quarks are produced mainly in the pre-equilibrium stage of heavy ion collision and serve as excellent probes entering the thermalized medium medium. They come out with altogether different momentum and energies and fragments into D mesons and later decay into non-photonic electron which are experimentally observed. Here we present effects of Quark Gluon Plasma on charm quark production...
Karolis Tamosiunas
(Vilnius University (LT))
23/07/2013, 15:20
Talk
Landau solution of hydrodynamics is generalized for the non-central high-energy nuclear collisions. The multiparticle production after hydrodynamic expansion from the transversely asymmetric initial state shows elliptic flow formation.
Moreover, obtained solution does reproduce the observed longitudinal scaling of the elliptic flow for the different collision energies at LHC and RHIC. It...
Marek Bombara
(Pavol Jozef Safarik University (SK))
23/07/2013, 15:20
Talk
Two-particle angular correlations provide a powerful tool to study jets and their modication in ultra-relativistic heavy-ion collisions. The study of the particle species dependence of correlation structures as a function of transverse momentum provides additional information on the particle production mechanisms at LHC energies.
In this contribution we will present studies of a near-side...
Qi-Ye Shou
(SINAP, BNL)
23/07/2013, 15:40
Talk
Theoretical study\cite{myref1} indicates that a chiral magnetic wave at finite baryon density could induce an electric quadrupole moment in QGP produced in heavy-ion collisions. The electric quadrupole deformation will lead to a difference in elliptic flow of hadrons, by increasing {$v_{2}$} of negatively charged hadrons and decreasing {$v_{2}$} of positively charged ones. The magnitude of...
Thierry Gousset
(Subatech)
23/07/2013, 15:40
It is generally assumed that in ultrarelativistic heavy ion collisions a plasma of quarks and gluons is produced, and then quickly expands and hadronizes. The main objective of present experiments at ultrarelativistic heavy ion colliders is to study this plasma. The
study of the plasma properties is difficult because the initial
momentum distribution of the light quarks is not known and that...
Andrzej Gabriel Wilczek
(University of Silesia (PL))
23/07/2013, 15:40
Talk
The problem of pinning down the critical point of strongly interacting
matter still puzzles the community. One of the answers
suspected to emerge in the near future will surely come from NA61/SHINE
- a fixed-target experiment aiming to discover the critical point as
well as to study the properties of the onset of deconfinement.
This goal will be reached by obtaining precise data on...
Dr
Jingyi Chao
(Institute of High Energy Physics, CAS)
23/07/2013, 16:20
Talk
We find that the barrier between topologically in-equivalent vacua is lowered at the presence of external magnetic field. As a consequence, the imbalanced chiral quark density arises due to the sphaleron transition at finite temperatures. It quantitatively explains and describes the unusual phenomena of the inverse magnetic catalysis, which was numerically found to happen at the transition...
Xiaoming Zhang
(Lawrence Berkeley National Lab. (US))
23/07/2013, 16:20
Talk
Nuclear Modification Factor and Elliptic Flow of Muons from Heavy-Flavour Hadron Decays in Pb–Pb Collisions at √ sNN = 2.76 TeV with ALICE
X. Zhang for the ALICE Collaboration
Lawrence Berkeley National Laboratory, Berkeley, CA, U. S. A.
The LHC heavy-ion physics program aims at investigating the properties of strongly-interacting matter in extreme conditions of temperature and energy...
Dr
Marcus Bluhm
(SUBATECH Nantes)
23/07/2013, 16:40
Talk
Great experimental and theoretical effort is being put into the detailed study of the confinement/deconfinement transition in QCD matter. Susceptibilities of conserved quantities, which are related to the statistical moments of particle multiplicity distributions measured in heavy-ion collisions, provide important insight, in particular, into the composition of the produced matter. Based on a...
Dr
W A Horowitz
(University of Cape Town)
23/07/2013, 16:40
Talk
Bulk matter phenomena in heavy ion collisions is characterized by an extremely small viscosity to entropy ratio best understood by strong coupling dynamics described by the AdS/CFT correspondence. We test a consistent description of QGP physics by applying this AdS/CFT paradigm to the energy loss of heavy quarks. Previously we found consistency with the non-photonic electron data at RHIC but...
Eduardo Grossi
(University of Florence & INFN Florence)
23/07/2013, 16:40
We present an extension of relativistic single-particle distribution function for weakly interacting particles at local thermodynamical equilibrium including spin degrees of freedom, for massive spin 1/2 particles. We infer, on the basis of the global equilibrium case, that at local thermodynamical equilibrium particles acquire a net polarization proportional to the vorticity of the inverse...
Prof.
Celso Barros
(Universidade Federal de Santa Catarina)
23/07/2013, 17:00
The STAR collaboration has measured the Λ and anti-Λ polarizations in 200 GeV Au-Au collisions [1]. These results can be understood in terms of a model [2], [3], that we proposed recently, based on the hydrodynamical model, and taking into account the effect of the final-state interactions (that occur in the hadronic phase) between the hyperons and other produced particles. These final...
Kanako Yamazaki
(University of Tokyo)
23/07/2013, 17:00
Talk
We extend our previous study of the quark-hadron phase transition at
finite temperatures with zero net baryon density by two flavor
Nambu-Jona-Lasinio model with Polyakov loop [1] to the three flavor
case. At low temperatures, only mesonic correlations,
mainly due to mesonic collective excitations, dominate the pressure
while thermal excitations of quarks are suppressed by the Polyakov...
Dr
Santosh Kumar Das
(Department of Physics and Astrophysics, University of Catania)
23/07/2013, 17:20
Talk
The propagation of heavy flavour through the quark gluon plasma has been treated commonly within the framework of Langevin dynamics,
i.e. assuming the heavy flavour momentum transfer is much smaller than the light one. On the other hand a similar suppression factor R_AA has been observed experimentally for light and heavy flavor.
We present a thorough study of the thermalization dynamics and...
Rudy Marty
(FIAS (Frankfurt, GERMANY))
23/07/2013, 17:20
Talk
Based on the Nambu-Jona-Lasinio model for 3 flavours we study the transport properties of strongly interacting matter in vicinity of the phase transition. We present our results on the temperature dependence of the shear and bulk viscosity (calculated within the relaxation time formalism), as well as of the electric and heat conductivity.
We compare these results with recent lattice data...
Masakiyo Kitazawa
(Osaka University)
23/07/2013, 17:40
Talk
We investigate time evolution of higher-order cumulants
of bulk fluctuations of conserved charges in the hadronic
stage in heavy ion collisions.
The dynamical evolution of the non-Gaussian fluctuations
are modeled by the diffusion master equation. In this
model, we show that the fourth-order cumulant is suppressed
compared with the recently observed second-order one
at...
Paul Richard Newman
(University of Birmingham (GB))
23/07/2013, 17:40
Anton Wiranata
(Lawrence Berkeley Lab)
23/07/2013, 17:40
Talk
Shear viscosity $\eta$ and entropy density $s$ of a hadronic resonance gas are calculated consistently within the Chapman-Enskog
approximation using the $K$-matrix parameterization of hadronic cross sections which preserves the unitarity of the $T$-matrix. In the $\pi-K-N-\eta$ mixture considered, a total of 82 resonances up to 2 GeV were included. Comparisons are also made to results with...
Johann Rafelski
(University of Arizona (US))
24/07/2013, 09:30
Talk
Chris Allton
(Swansea University)
24/07/2013, 10:00
Talk
The interquark potential in charmonium states is calculated for the first time in both the zero and non-zero temperature phases from a first-principles lattice QCD calculation. Simulations with two dynamical quark flavours were used with temperatures T in the range 0.4Tc T 1.7Tc, where Tc is the deconfining temperature. The correlators of point-split operators were analysed to gain spatial...
Krzysztof Redlich
(University of Wroclaw (PL))
24/07/2013, 11:00
Talk
We will discuss the role of fluctuations of conserved charges
and the Polayakov loop, as well as their probability
distributions, to detect deconfinement and chiral phase
transition or their remnants.
Prem Kumar
(Swansea University)
24/07/2013, 11:30
Talk
The properties of quark matter at high density and strong coupling remain largely intractable using conventional tools. We review how the tools of string theory and holography can pave the way towards a better understanding of general properties of such phases of matter using a holographically dual gravitational picture. We will describe some recent results within such a framework that point...
Takeshi Kodama
(Universidade Federal do Rio de Janeiro)
24/07/2013, 12:00
Talk
The success of hydrodynamic description of the collective flow dynamics in relativistic heavy ion collisions is often understood as the realization of local thermal equilibrium during the phase of QGP. However, the scale of locality is not clear. Some of such basic questions about the hydrodynamic approach to relativistic heavy-ion collisions are discussed aiming to clarify how far we can go...
Michal Petran
(Czech Technical University (CZ))
25/07/2013, 09:30
Talk
We present a highly successful description of all available particle yields in Pb–Pb collisions at 2.76 TeV measured by the ALICE experiment as a function of centrality. We find that our fit of π, K, p, Ξ and Ω within the framework of non–equilibrium statistical hadronization model is consistent with previous fits of Au–Au data at 62.4 and 200 GeV from RHIC. The more precise LHC data strongly...
Johanna Stachel
(Ruprecht-Karls-Universitaet Heidelberg (DE))
25/07/2013, 10:00
Talk
Liang Zhong
(Tsinghua University (CN))
25/07/2013, 11:00
Talk
With a unique forward acceptance, and excellent vertexing and particle identification capability, LHCb is well-placed to make important contributions to heavy ion physics through measurements performed using data taken during pA and Ap collisions. The first studies of these data will be presented. These include measurements of particle multiplicity and studies of strange and charmed...
Dr
Andreas Morsch
(CERN)
25/07/2013, 11:30
Talk
Eric Andrew Appelt
(Vanderbilt University (US)),
The CMS Collaboration
(CMS)
25/07/2013, 12:00
Talk
Spectra of identified charged hadrons measured in pPb collisions at the LHC at $sqrt{s_{NN}} = 5 $TeV are presented. Charged pions, kaons, and protons in the transverse-momentum range p_T = 0.1-1.7 GeV/c and for central rapidities are identified via their energy loss in the CMS silicon tracker. The average p_T increases rapidly with the mass of the hadron and the charged-particle multiplicity...
Michael Gardner
(University of California Davis (US)),
The CMS Collaboration
(CMS)
25/07/2013, 14:00
Talk
The Compact Muon Solenoid (CMS) is fully equipped to measure leptonic decays of electroweak 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 standard candle of...
Christoph Herold
(Frankfurt Institute for Advanced Studies)
25/07/2013, 14:00
Talk
Experimental signals for a possible QCD critial point and first-order phase transition are strongly influenced by the rapid nonequilibrium dynamics during a heavy-ion collision. In order to estimate and understand these effects we study the cooling through the phase transition within a nonequilibrium chiral fluid dynamics model. The order parameters for the chiral and deconfinement transition...
Dr
Hamza Berrehrah
(FIAS)
25/07/2013, 14:00
Talk
The aim of this project is to study the properties of the QGP produced in relativistic heavy-ion collisions (HIC) using heavy quarks - charm and beauty (c, b) - as penetrating probes. The heavy quarks (and correspondingly charm and beauty mesons) are considered to be one of the best probes for such a study since due to their large mass they are produced dominantly by hard processes during the...
Jan Uphoff
(Goethe University Frankfurt)
25/07/2013, 14:20
Talk
The full space-time evolution of gluons, light and heavy quarks in ultra-relativistic heavy-ion collisions is studied within the partonic transport model Boltzmann Approach to MultiParton Scatterings (BAMPS). We discuss in detail for all flavors the influence of elastic and radiative energy loss with a running coupling. Radiative processes, in particular, are implemented through an improved...
Marta Verweij
(Wayne State University (US))
25/07/2013, 14:20
Talk
One of the major goals of jet and high pT measurements in heavy-ion collisions is the quantification of the medium-modified fragmentation of hard scattered partons. Here, the aim in the reconstruction of jets, as compared to single particle measurements, is to gain a larger sensitivity to the possibly modified structure of the parton shower. It aims at the understanding of the detailed...
Ms
Sabita Das
(Brookhaven National Laboratory, USA and Institute of Physics, India)
25/07/2013, 14:20
Talk
The STAR experiment at RHIC has collected data at various collision
energies in its beam energy scan (BES) program to study
the QCD phase diagram. The BES program covers a large part of the QCD
phase diagram in terms of temperature (T) versus baryon chemical
potential ($\mu_B$). The collected data set can be used to study the
kinetic and chemical freeze-out dynamics. The kinetic and...
Dr
Iurii Karpenko
(Frankfurt Institute for Advanced Studies)
25/07/2013, 14:40
Talk
We employ the up-to-date version of viscous Hydro-Kinetic Model (vHKM) based on 3+1D viscous hydrodynamic code coupled to UrQMD hadron cascade.
Following the experimental program at BNL RHIC, we perform a similar "energy scan" in the model, and study the collision energy dependence of charged and identified hadron spectra, flow coefficients and femtoscopic radii. For this aim the equation of...
Ioannis Bouras
(University of Frankfurt a.M.)
25/07/2013, 14:40
Talk
Using a microscopic transport model we investigate the evolution of conical structures originating from the supersonic jet
through the hot matter and dense matter of ultra-relativistic heavy-ion collisions. We found that the Mach cone angle
is influenced by the source term properties, energy deposition and viscosity. While in a static medium a possible
double-peak structure is overshadowed...
David Tlusty
(NPI ASCR)
25/07/2013, 14:40
Talk
Heavy quarks are expected to be created from initial hard scatterings. Due to their large masses, their production can be described by perturbative QCD. The charm production cross section measurement in $p+p$ collisions provides an important baseline to further exploring the QCD medium. At STAR, charm quarks are measured through Open Charm Mesons and Non-photonic Electrons (electrons from...
Zvi Citron
(Weizmann Institute of Science (IL))
25/07/2013, 15:00
Talk
Measurements of high-pT processes in lead-lead collisions can
provide insight on the physics responsible for the quenching
of jets in the quark gluon plasma. Results will be presented
from ATLAS measurements of single jet suppression, both inclusively
and as a function of the azimuthal angle of the jets with respect
to the elliptic flow plane, single jet fragmentation, and...
Deepa Thomas
(University of Utrecht (NL))
25/07/2013, 15:00
Talk
Measurement of electrons from heavy-flavour decays in Pb-Pb collisions at √sNN = 2.76 TeV with ALICE
Deepa Thomas (Utrecht University) for the ALICE Collaboration
The measurement of heavy-flavour (charm and beauty) production in ultra-relativistic heavy-ion collisions is an important probe to study the properties of the high temperature and density medium created in such collisions. ...
Dr
SALVATORE PLUMARI
(UNIVERSITY OF CATANIA, ITALY)
25/07/2013, 15:00
Talk
We investigate within a parton cascade approach at fixed $\eta/s$ ratio the effect of a temperature dependent
$\eta/s(T)$ at three different beam energies from RHIC for Au+Au at $\sqrt(s)=$62.4, 200 GeV to LHC energies for
Pb+Pb at $\sqrt(s)=$2.76 TeV. An important result is that for the different beam energies considered the
suppression of the elliptic flow due to the viscosity of the...
Elena Bruna
(Universita e INFN (IT))
25/07/2013, 15:20
Talk
D meson nuclear modification factor and v2 in Pb-Pb collisions
Elena Bruna (INFN Torino) for the ALICE Collaboration
The remarkable heavy-flavour results from RHIC and LHC show that heavy quarks are affected by the strongly coupled medium created in heavy-ion collisions at high energies. A way to characterize the properties of such a hot and dense medium is to quantify to what extent...
Mr
Amal( for the STAR collaboration) Sarkar
(Indian Institute of Technology Bombay, Mumbai)
25/07/2013, 15:20
Talk
The Relativistic Heavy-Ion Collider (RHIC), at BNL, has started its beam energy scan(BES) program by colliding heavy-ions covering a wide range in baryonic chemical po- tential. One of the main goals of this beam energy scan program is to locate the critical point which is postulated to lie at the end of the phase transition boundary between partonic and hadronic matter. Finite temperature...
Guo-Liang Ma
(Shanghai INstitute of Applied Physics (SINAP), CAS)
25/07/2013, 15:20
Talk
Within a multi-phase transport (AMPT) model, the transverse momentum asymmetries for $\gamma$-jet and di-jet are studied in Pb+Pb collisions at $\sqrt{s_{_{\rm NN}}}$ = 2.76 TeV. A large asymmetry is produced by strong interactions between jets and partonic matter rather than by hadronic interactions only. It is demonstrated that final hadronic processes such as hadronization and hadronic...
Prof.
Tomoki Endo
(Kagawa National College of Technology)
25/07/2013, 15:40
Talk
Appearance of a quark matter in the core region of hybrid stars is the main issue in such compact stars because the central density of the star is sufficiently high for the nuclear matter to undergo a further change into other exotic phase which consist of hyperons and quarks. Therefore a quark matter is expected in the core region but many theoretical calculation suggest that the inner...
Dr
Renu Bala
(University of Jammu (IN))
25/07/2013, 15:40
Talk
Open-charm production as a function of charged-particle multiplicity in pp collisions at √s = 7 TeV with ALICE
Renu Bala, for the ALICE Collaboration
University of Jammu, Jammu
Heavy quarks (charm and beauty) are an effective tool to investigate the properties of the Quark-Gluon Plasma in heavy ion collisions as they are produced in initial hard scattering processes and as they...
Feng Zhao
(University of California, Los Angeles)
25/07/2013, 16:30
Talk
Strange hadron production is believed to be sensitive to parton dynamics in nucleus-nucleus collisions, in particular, the strange quark production rate and its subsequent evolution in the dense partonic medium depend on the beam energy and the net baryon density. We will present STAR measurements of $K_{s}$, $\Lambda$, $\Xi$, $\Omega$ at mid-rapidity from Au+Au collisions at the beam energies...
Huichao Song
(Peking U)
25/07/2013, 16:30
Talk
The elliptic flow of common hadrons (pions, kaons, and protons) are developed in both the QGP and the hadronic phase and are sensitive to the viscosity of the evolving fireball. For a precise extraction of the QGP viscosity from these flow data, Hybrid model calculations that combine hydrodynamic simulations of the expending QGP fluid with microscopic descriptions of the re-scattering hadronic...
Cristina Terrevoli
(Universita e INFN (IT))
25/07/2013, 16:30
Talk
Prospects for heavy flavour measurements with the ALICE inner tracker upgrade
C.Terrevoli, University and INFN of Cagliari, on behalf of the ALICE Collaboration
The ALICE detector is designed to investigate the properties of the hot and dense plasma of quarks and gluons, formed at the extreme energy densities reached in Pb-Pb collisions at LHC.
Among the probes useful to investigate...
Domenico Colella
(Universita e INFN (IT))
25/07/2013, 16:50
Talk
Measurement of the production of strange and multi-strange particles is a fundamental tool in the investigation of the hot and dense QCD matter created in ultra-relativistic nucleus-nucleus collisions, as there is no net strangeness content in the initial colliding system.
Multi-strange baryons are measured in the ALICE apparatus through the reconstruction of the cascade topology of their...
Mr
Yasir Ali
(Jagiellonian University)
25/07/2013, 16:50
Talk
A feasibility study for D0 meson (Open charm) measurements via its decay into two daughter particles, D0 → K+ π−, in a central Pb-Pb collisions at SPS energies will be presented. To generate the physical input we use AMPT (A MultiPhase Transport model) event generator. We employed the GEANT4 application to describe particle ...
Mr
Graham Richard Lee
(University of Birmingham (GB))
25/07/2013, 16:50
Talk
The study of pp collisions at LHC energies is important not only as a baseline for future analysis in heavy-ion events at ALICE but also aiding in the calibration of QCD inspired models for LHC energies.
ALICE has measured the rho0, Sigma* and Csi* resonances in pp collisions at sqrt(s) = 7 TeV. This presentation will give an overview of the obtained results including transverse momentum...
Anders Garritt Knospe
(University of Texas (US))
25/07/2013, 17:10
Talk
Properties of the hadronic phase of high-energy heavy-ion collisions can be studied by measuring the ratios of hadronic resonance yields to the yields of longer-lived particles such as charged pions and kaons. These ratios can be used to study the strength of re-scattering effects, the chemical freeze-out
temperature, and the lifetime between chemical and kinetic freeze-out. The restoration...
Luke David Hanratty
(University of Birmingham (GB))
25/07/2013, 17:10
Talk
The production of the Λ and 𝐾0s hadrons at the LHC can be measured through the reconstruction of their weak decay topologies with only charged particles in the final state. The tracking and particle identification capabilities of the ALICE detector allow us to measure the spectra of these particles over a wide transverse momentum range (0.4 < pT < 12 GeV/c), and to precisely determine the...
Prof.
Alexander Sorin
(Joint Institute for Nuclear Research), Prof.
Vladimir Kekelidze
(Joint Institute for Nuclear Research)
25/07/2013, 17:10
Talk
The NICA (Nuclotron-based Ion Collider fAcility) project is now under the realization stage at the Joint Institute for Nuclear Research (JINR, Dubna). The main goal of the project is an experimental study of hot and dense strongly interacting matter in heavy ion collisions at centre-of-mass energies √s_NN = 4 - 11 GeV (NN-equivalent) and the average luminosity of 10E27 cm-2 s-1 for Au(79+) in...
Alessandro De Falco
(Universita e INFN (IT))
25/07/2013, 17:30
Talk
Low mass vector meson (ρ, ω, ϕ) production provides key information on
the hot and dense state of strongly interacting matter produced in high-energy heavy-ion collisions. Among them, strangeness production can be accessed through the measurement of ϕ meson production. The detection of vector mesons through their decay in dileptons has the advantage, with respect to hadronic decays, that the...
Prof.
Hans Rudolf Schmidt
(University of Tuebingen)
25/07/2013, 17:30
Talk
The CBM experiment is one of the four scientific pillars of the Facility for Antiprotons and Ion Research (FAIR) in Darmstadt, Germany. Its discovery potential – complementary to heavy-ion experiments at colliders – is based on high-luminosity ion beams. This enables access to extremely rare probes such as charmed particles, vector mesons, multi-strange hyperons or even double hypernuclei with...
Eleazar Cuautle Flores
(Universidad Nacional Autonoma (MX))
25/07/2013, 17:30
Talk
We present a model to compute baryon and meson transverse momentum
distributions, and their ratios, in relativistic heavy ion collisions.
Our model allow to compute the probability to form colorless bound
states of either two or three quarks as functions of the evolving
density during the collision. The qualitative differences of the
baryon to meson ratio for ...
Thorsten Renk
(University of Jyväskylä)
26/07/2013, 09:00
Talk
Jet quenching is a cornerstone of the heavy-ion physics program at the LHC.
I review the current understanding of jet quenching in terms of a QCD shower evolution being modified by the surrounding medium, leading to copious medium induced radiation, and I outline the evidence for this picture from the light parton sector. Conceptually, the QCD shower description should also be relevant for...
George Stephans
(Massachusetts Inst. of Technology (US)),
The CMS Collaboration
(CMS)
26/07/2013, 09:30
Talk
We present a review of recent experimental results on jet production and properties in heavy-ioncollisions by the CMS Collaboration, with emphasis on jet-quenching and heavy quark jet production. These studies include various parton energy loss phenomena (dijet and photon-jet energy imbalance, jet shapes and fragmentation functions), a study of heavy quark jet production using b quark tagging...
Dr
Panos Christakoglou
(NIKHEF (NL))
26/07/2013, 10:00
Talk
Angular correlations are a sensitive probe of the transport properties of the system produced in heavy-ion collisions. Angular correlations measured in p--Pb have recently revealed intriguing features as well. In this talk, we will review the latest results on charged and identified particle correlations obtained with the ALICE detector at the LHC in both Pb--Pb and p--Pb events.
Yoshimasa Ikeda
(for the PHENIX collaboration, Riken)
26/07/2013, 11:00
Talk
Large azimuthal anisotropy of particle emission in non-central heavy ion collisions has been has been clearly observed in heavy ion collision at RHIC since 2001. The elliptic flow as given by the second term of the Fourier series for the azimuthal distribution of particles with respect to the event plane is believed to carry information on the initial geometrical anisotropy. One of the early...
Dr
Hao Qiu
(Lawrence Berkeley National Laboratory)
26/07/2013, 11:30
Talk
The STAR Collaboration will complete the Heavy Flavor Tracker (HFT) and the Muon Telescope Detector (MTD) upgrades by 2014. HFT utilizes the state-of-art active thin pixel detector technology, which will greatly enhance STAR physics capability by measuring heavy quark collectivity and correlations via the topological reconstruction of charmed hadrons over a wide momentum range. MTD is based on...
Evgeni Kolomeitsev
(Matej Bel University)
26/07/2013, 12:00
Talk
We discuss the strangeness production in heavy-ion collisions at SIS-FAIR-NICA energies
and the role of doubly and triply strange baryons for testing the strangeness balance in a collision event. The minimal statistical model is applied, in which the total strangeness yield is fixed by the observed K+ multiplicity. Exact strangeness conservation in each collision event is explicitly...
Grazia Luparello
(NIKHEF (NL))
26/07/2013, 14:00
Talk
Measurement of D meson production in p-Pb collisions with
the ALICE detector
Grazia Luparello (NIKHEF and Utrecht University) for the ALICE Collaboration
The ALICE Collaboration has measured the production of prompt $\rm{D^0}$, $\rm{D^{+}}$ and $\rm{D^{*+}}$ mesons in Pb-Pb and pp collisions by fully reconstructing their hadronic decays. A large suppression of D meson yield in the most...
Swatantra Kumar Tiwari
(Banaras Hindu University)
26/07/2013, 14:00
Talk
Recently, we proposed a thermodynamically consistent excluded-volume model for a hot, dense hadron gas (HG). We confront our model calculations on various properties of HG, multiplicity and ratios of various strange and non-strange particles in the entire range of temperature and baryon densities with the other models and experimental data and we find that our model describes the experimental...
Daniel Kikola
(Warsaw University of Technology)
26/07/2013, 14:00
Suppression of quarkonia production in high energy nuclear collisions relative to proton-proton collisions, due to the Debye screening of the quark-antiquark potential, was proposed as a signature of the formation of the Quark-Gluon Plasma (QGP). Measurement of production of various quarkonia states can provide insight into thermodynamic properties of the QGP since different states have...
Su Houng Lee
(Yonsei University)
26/07/2013, 14:20
Using the QCD sum rule with its operator product expansion reliably
estimated from lattice calculations for the pressure and energy density
of hot QCD matter, we calculate the strength of the $J/\psi$ wave function at origin and find that it decreases with temperature when the temperature is above the transition temperature. This result is shown to follow exactly that obtained from the...
Markus Ansgar Heide
(Westfaelische Wilhelms-Universitaet Muenster (DE))
26/07/2013, 14:20
Talk
Measurement of electrons from heavy-flavour hadron decays in pp and p-Pb collisions with ALICE at the LHC
Markus Heide for the ALICE Collaboration, WWU Münster
Charm and beauty quark production in hadronic collisions occurs mostly in initial parton scattering processes with high virtuality. The measurement of heavy-flavour decay electrons in pp collisions with the ALICE detector...
Fabio Filippo Colamaria
(Universita e INFN (IT))
26/07/2013, 14:40
Talk
Fabio Filippo Colamaria, for the ALICE Collaboration
ALICE measured a significant suppression of D-meson production in a wide momentum range in central Pb-Pb collisions with respect to the expectation based on the cross section measured in pp collisions, scaled by the number of nucleon-nucleon collisions. This effect can be, at least partially, attributed to the energy loss by charm quarks...
Christian Schmidt
(University of Bielefeld)
26/07/2013, 14:40
Talk
Appropriate combinations of up to fourth order cumulants of net strangeness fluctuations and their correlations with net baryon number and electric charge fluctuations, obtained from ab-initio Lattice QCD calculations, have been used to probe the strangeness carrying degrees of freedom at high temperatures. For temperatures up to the chiral crossover separate contributions of strange mesons...
Igor Lakomov
(Universite de Paris-Sud 11 (FR))
26/07/2013, 15:00
Talk
Production of charmonia, bound state of c and cbar quarks, is an intense research activity, both experimentally and theoretically. In addition, the peculiar properties of some of the charmonium states, like their small size (< 1 fm) and strong binding energy (several hundred MeV), make them ideal probes of the strongly interacting matter, the so-called Quark-Gluon Plasma (QGP), formed in...
Dr
Magdalena Djordjevic
(Institute of Physics Belgrade, University of Belgrade, Serbia)
26/07/2013, 15:00
Suppression of light and heavy flavor observables is one of the most important probes in studying the properties of QCD matter created at RHIC and LHC experiments. We will here provide the most up-to-date light and heavy flavor suppression predictions for the available (2.76TeV) and the upcoming (~5TeV) Pb+Pb collisions at LHC. The predictions are based on our recent improvements in the energy...
Prof.
Jean Cleymans
(University of Cape Town)
26/07/2013, 15:00
Talk
Changes in the transverse momentum distributions with beam energy
are studied using the Tsallis distribution as a parameterization.
The dependence of the Tsallis parameters q, T and the volume
are determined as a function of beam energy.
The Tsallis parameter q shows a weak but clear increase with beam energy
with the highest value being approximately 1.15.
The Tsallis temperature...
Dr
francesco scardina
(INFN Catania)
26/07/2013, 15:20
Talk
A current goal of relativistic heavy ion collisions experiments
is the search for a Color Glass Condensate as the limiting state of QCD matter at very high density.
In viscous hydrodynamics simulations, a standard Glauber initial condition leads to estimate $4\pi \eta/s \sim 1$, while
a Color Glass Condensate modeling leads to at least a factor of 2 larger $\eta/s$.
Within a kinetic theory...
Mr
Roland Katz
(SUBATECH)
26/07/2013, 15:20
Quarkonia suppression in heavy ion collisions has been investigated as a probe to Quark-Gluon Plasma properties and was indeed observed at SPS. However, the saturation of the suppression observed at RHIC and then is decrease at LHC has triggered the interest of our community and leads to consider alternate schemes as those based on sequential suppression in a stationary medium. In our...
Leonardo Milano
(CERN)
26/07/2013, 15:20
Talk
The double ridge structure previously observed in Pb-Pb collisions has also been recently observed in high-multiplicity p-Pb collisions at \sqrt{s_{NN}} = 5.02 TeV. These systems show a long-range structure (large separation in ∆η) at the near- (∆ϕ = 0) and away-side (∆ϕ = π) of the trigger particle. In order to understand the nature of this effect the two-particle correlation analysis has...
Nicholas Brook
(University of Bristol (GB))
26/07/2013, 15:40
Studies of strangeness and quarkonia production in the forward region provide important input to the understanding of QCD models in a kinematical range where they have large uncertainties. The LHCb experiment has collected a dataset corresponding to an integrated luminosity of about 3 fb-1 in proton-proton collisions at sqrt(s)= 7 and 8 TeV, as well as smaller samples recorded with other LHC...
Jonas Anielski
(Westfaelische Wilhelms-Universitaet Muenster (DE))
26/07/2013, 15:40
Talk
Recent measurements of di-hadron correlations in p–Pb collisions at sqrt(s_NN) = 5.02 TeV revealed a double-ridge pattern, reminiscent of the one observed in Pb–Pb collisions.
This raises the question of the possible existence of collective effects in high multiplicity p–Pb collisions. Further insight into the observed phenomena can be gained by studying the evolution of spectral shapes with...
Fiorella Fionda
(Universita e INFN (IT))
26/07/2013, 16:30
The ALICE detector provides excellent capabilities to study
quarkonium production at the Large Hadron Collider (LHC).
Quarkonia, bound states of heavy (charm or bottom) quark
anti-quark pairs such as the J/psi, are expected to be
produced by initial hard processes. Thus they will provide
insight into the earliest and hottest stages of A-A
collisions where the formation of a...
Daniel Tapia Takaki
(Universite de Paris-Sud 11 (FR))
26/07/2013, 16:30
Talk
The electromagnetic fields surrounding the protons and nuclei, accelerated by the LHC, lead to very large cross sections for photon-induced processes. This makes the LHC the world's most powerful collider not only for protons and lead ions but also for photon-photon and photon-hadron collisions. These interactions can be studied in ultra-peripheral collisions, where the impact parameters are...
Mr
Maxim Beitel
(Institut für Theoretische Physik, Goethe Universität)
26/07/2013, 16:30
Talk
We examine the evolution of a heavy ion collision starting from non-equilibrium to an equilibrium state by looking at the corresponding thermalization times. Therefore we use the hadronic transport model "UrQMD" as microscopic model for high-energetic heavy ion collisions. Unfortunately these times are too long at present because detailed balance is not realized for all collisions which may...
Lizardo Valencia Palomo
(Universite de Paris-Sud 11 (FR))
26/07/2013, 16:50
ALICE (A Large Ion Collider Experiment), one of the four main experiments at the Large Hadron Collider (LHC), was designed and built to perform dedicated research on heavy-ion collisions to study the Quark-Gluon Plasma (QGP), a deconfined state of strongly interacting QCD matter.
As heavy flavours are produced on a very short time-scale in the initial hard scattering processes, they can be...
Dr
Pasi Huovinen
(Frankfurt Institute for Advanced Studies)
26/07/2013, 16:50
Talk
In hydrodynamical modeling of the ultrarelativistic heavy-ion
collisions the freeze-out is typically performed at a constant
temperature. In this work we introduce a dynamical freeze-out
criterion, which compares the hydrodynamical expansion rate with the
pion scattering rate [1]. Previous studies [2] have shown that
differences between constant temperature and dynamical...
Prof.
Subrata Pal
(Tata Institute of Fundamental Research, Mumbai)
26/07/2013, 16:50
Talk
The production of light nuclei, hypernuclei and their antiparticles in relativistic energy heavy ion collisions are explored within a relativistic Hagedorn Resonance Gas (HRG) model. In the HRG model the unknown heavy-mass resonance spectra is characterized by an exponentially growing Hagedorn states that undergo sequential binary emission of lighter resonances and stable hadrons till all the...
Ramona Lea
(Universita e INFN (IT))
26/07/2013, 17:10
Talk
In high-energy heavy-ion collisions hyperon-baryon bound systems, called hypernuclei, can emerge from the hot and dense fireball region of the reaction.
Their production yield can be estimated employing two distinct models: they can be formed via the coalescence of nucleons and hyperons produced in the collision or they can be produced directly in the hadronisation process. The study of the...
Palash Khan
(Saha Institute of Nuclear Physics (IN))
26/07/2013, 17:10
The ALICE apparatus at the LHC was designed and built to perform dedicated
studies of the Quark-Gluon Plasma (QGP), a strongly interacting QCD matter deconfined state, expected to be created in high energy heavy-ion collisions. In such collisions heavy flavours are produced at the very early stage of the interaction in the initial hard scattering processes and hence can be used to...
Prof.
Yifei Zhang
(University of Science and Technology of China)
26/07/2013, 17:30
(for the STAR Collaboration)
Recent RHIC measurements support that a strongly coupled nuclear matter
with parton degree of freedom has been created in relativistic heavy-ion
collisions. However, the thermalization of such a hot and dense medium is
still unclear. Heavy quarks are expected to be created from initial hard
scatterings. Their large masses are not easily affected by the...
Benjamin Doenigus
(GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
26/07/2013, 17:30
Talk
The high collision energies reached at the LHC lead to significant production yields of light anti-nuclei and hyper-matter in proton-proton and, in particular, Pb-Pb collisions. The excellent particle identification capabilities of the ALICE apparatus, based on the specific energy loss in the Time Projection Chamber and time-of-flight measurement, allow for the detection of these rarely...
Tamas Biro
(KFKI RMKI)
27/07/2013, 09:30
Talk
Andrea Dainese
(Universita e INFN (IT))
27/07/2013, 10:40
Talk
Orlando Villalobos Baillie
(University of Birmingham (GB))
27/07/2013, 11:40
Talk
Mohammed Younus
(Variable Energy Cyclotron Centre)
Poster
It is known that heavy quarks are produced in pairs. There always exists a correlation in azimuthal angle in transverse momentum plane between such both the members in such pairs. The two quarks in a pair may lose different amount of energy while traveling through QGP and it is expected that the correlation of Q\bar{Q} will be altered considerably. Also in a completely different picture...
Michal Petran
(Czech Technical University (CZ))
Poster
In Pb–Pb collisions at sN N = 2.76 TeV at LHC, a rather large number of charm–anti-charm quark pairs, Ncc ≡ dNcc /dy, is produced in initial hard parton collisions before the QGP phase emerges. Given Ncc , we predict yields of all charmed hadrons using statistical hadronization method. We use the experimental D0 meson pT -spectrum to estimate the range of charm abundance present at...
Ivonne Alicia Maldonado Cervantes
(Universidad Nacional Autonoma (MX))
Poster
Recent data collected at the LHC are confronted with the possible existence of flow in proton-proton collisions. Different Monte Carlo models are used to explain the multiplicity, transverse momenta distributions and other variables that allow characterize proton-proton events. In this work we present a work on the frame of PYTHIA 8 Monte Carlo model, showing that this event generator...
Andrea Dubla
(University of Utrecht (NL))
Poster
Elliptic flow of heavy-flavour decay electrons at √sNN = 2.76 TeV with the ALICE detector
Andrea Dubla (Utrecht University) for the ALICE Collaboration
Heavy-quarks, i.e. charm and beauty, are mainly produced in hard scattering processes in the early stages of high energy nucleus- nucleus collisions, carrying informations on the full evolution of the medium. Therefore, they are suited to...
Daniel Cabrera
(Frankfurt University and FIAS)
Poster
Charm and bottom transport coefficients in a light meson gas, such as is formed in the hadronic phase of Heavy Ion Collisions, are obtained within chiral perturbation theory and implementing constraints from heavy quark symmetry. By means of unitarization of the lowest order heavy-light meson scattering amplitudes, the D/B_0 and D/B_1 resonant states are dynamically generated in the isospin...
Elienos Pereira De Oliveira Filho
(Universidade de Sao Paulo (BR))
Poster
Measurements of the correlation between electrons from heavy-avour hadron decays and light hadrons with ALICE at the LHC
Elienos Pereira de Oliveira Filho, for the ALICE Collaboration
Relativistic heavy-ion collisions are a unique tool to study the properties of the Quark-Gluon Plasma (QGP) in the laboratory. For this purpose, several observables have been measured with ALICE at the LHC,...
Jan Piotr Sikorski
(Warsaw University of Technology (PL))
Poster
Hydrodynamics calculations have been successfully used in studies of the bulk properties of the Quark-Gluon Plasma, particularly of elliptic flow and shear viscosity.
However, there are areas (for instance event-by-event simulations for flow fluctuations and higher-order flow harmonics studies) where further advancement is hampered by lack of efficient and precise 3D+1 program.
This problem...
Daniel Cabrera
(Frankfurt University and FIAS)
Talk
We discuss updated results on the properties of strange mesons in nuclear matter at finite temperature from a chiral unitary approach in coupled channels, which incorporates the s- and p-waves of the kaon nuceon interaction. As a novelty, the in-medium scattering amplitudes and cross sections in several channels (such as Kbar N -> pi Sigma) are obtained in addition to the (off-shell) K and...
Linus Feldkamp
(Westfaelische Wilhelms-Universitaet Muenster (DE))
Poster
Study of b-jet tagging performance in ALICE
Linus Feldkamp, for the ALICE Collaboration
Heavy quarks, produced in the early stage of heavy-ion collisions, are ideal probes to study the characteristics of the hot and dense deconfined medium (Quark-Gluon Plasma) formed in these collisions.
The energy loss of high energy partons interacting with the medium is expected to be larger for...
Rudy Marty
(FIAS (Frankfurt, GERMANY))
Poster
Every dynamical description of heavy-ion collisions --whether based on hydrodynamics or on a parton cascade-- starts out with the modeling of the 'initial condition', i.e. the state of the system after the first initial energetic collisions between target and projectile nucleons. Usually it is assumed that the whole system or at least the quark-gluon plasma comes to a thermal equilibrium...
