Conveners
Heavy Ions: Collective Effects and Correlations
- Matthew Nguyen (Centre National de la Recherche Scientifique (FR))
Heavy Ions: Heavy Flavor
- Zvi Citron (Weizmann Institute of Science (IL))
Heavy Ions: BES and Future
- Anne Marie Sickles (Univ. Illinois at Urbana-Champaign (US))
Heavy Ions: Jets and Heavy Flavor Probes
- Marco Van Leeuwen (Nikhef National institute for subatomic physics (NL))
Heavy Ions: Jets and Heavy Flavor Physics
- Anna Stasto (Pennsylvania State University (US))
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Jacopo Margutti (Utrecht University (NL))04/08/2016, 14:30Heavy IonsOral PresentationALICE (A Large Ion Collider Experiment) is designed and optimised to study the properties of the Quark-Gluon Plasma (QGP), a new state of matter, which is expected to be created at the high energy densities reached at the LHC. One of the key observables used to characterize the properties of the QGP is the azimuthal anisotropy in particle production. This so-called anisotropic flow is...Go to contribution page
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Sarah Campbell (PHENIX)04/08/2016, 14:50Heavy IonsOral PresentationCollisions of simple systems, such as p+p, or p+Nucleus have been used as benchmarks for our understanding of Heavy Ion Collisions, since it was assumed they would be free of the effects from hot nuclear matter.โ Recently long range correlations and anisotropies of momentum spectra have been seen in such collisions, challenging this assumption. Such phenomena have been understood to be the...Go to contribution page
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Igor Lakomov (CERN)04/08/2016, 15:10Heavy IonsOral PresentationIgor Lakomov for the ALICE Collaboration ALICE is dedicated to the study of the strongly interacting matter, the so-called Quark-Gluon Plasma (QGP), formed in heavy-ion collisions at the LHC. In addition, ALICE also actively participated in the pp and p-Pb collision programs at the LHC. In particular, the measurements of the two-particle azimuthal correlations in pp collisions at 7 TeV and in...Go to contribution page
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Jinfeng Liao (Indiana University)04/08/2016, 15:30Heavy IonsOral PresentationAnomalous chiral transport processes, with the notable examples of Chiral Magnetic Effect (CME) and Chiral Magnetic Wave (CMW), are remarkable phenomena that stem from highly nontrivial interplay of QCD chiral symmetry, axial anomaly, and gluonic topology. The heavy ion collisions provide a unique environment where a hot chiral-symmetric quark-gluon plasma is created, gluonic topological...Go to contribution page
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474. Measurements of flow and correlation phenomena in pp, pPb and PbPb collisions at CMS (15' + 5')Sandra Padula (UNESP - Universidade Estadual Paulista (BR))04/08/2016, 15:50Heavy IonsOral PresentationMany aspects of anisotropic collective flow in ultra relativistic heavy-ion collisions have been studied extensively in the past years using two or more particle correlations. An overview of collective flow and particle correlation measurements at CMS as a function of transverse momentum, pseudorapidity, event multiplicity, for both charged hadrons or identified particles will be presented....Go to contribution page
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Anne Marie Sickles (Univ. Illinois at Urbana-Champaign (US))04/08/2016, 16:10Heavy IonsOral PresentationATLAS measurement of azimuthal correlations between particle pairs at large pseudorapidity separation in pp and pPb collisions are presented. The data were collected using a combination of the minimum-bias and high track-multiplicity triggers. A detailed study of the dependence of two-particle correlations on the charged particle multiplicity, transverse momentum of the pair constituents and...Go to contribution page
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Jian Sun (Purdue University (US))04/08/2016, 17:00Heavy IonsOral PresentationStudies of Heavy flavor production are of great interest in heavy ion collisions. In the produced medium, the binding potential between a quark and antiquark in quarkonium is screened by surrounding light quarks and antiquarks. Thus, the various quarkonium states are expected to be melt at different temperatures depending on their binding energies, which allows us to characterize the QCD phase...Go to contribution page
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Ionut Cristian Arsene (University of Oslo (NO))04/08/2016, 17:20Heavy IonsOral PresentationAccording to lattice QCD calculations, the hot and dense fireball created in relativistic heavy-ion collisions undergoes a phase transition to a relatively long lived deconfined state, named Quark-Gluon Plasma (QGP), which allows the study of QCD in a new regime with respect to pp or elementary particle collisions. Heavy quarks constitute an important probe for QGP studies since they are...Go to contribution page
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Alexander Rothkopf (Heidelberg University)04/08/2016, 17:40Heavy IonsOral PresentationThe bound states of a heavy quark and antiquark ( $b\bar{b},c\bar{c}$ ) are ideal probes of the quark-gluon plasma created in relativistic heavy-ion collisions at the RHIC and LHC, since their comparatively large mass allows them to sample the properties of the bulk over its full lifetime. A rich phenomenology is connected with these states. On the one hand, their sequential melting, as e.g....Go to contribution page
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Prof. Maria Beatriz Gay Ducati (UFRGS)04/08/2016, 18:00Heavy IonsOral PresentationIt is investigated the exclusive production of quarkonium states in proton-proton and nucleus-nucleus collisions at the LHC employing the light-cone dipole formalism theoretical framework. We calculate the rapidity, amd specially the tranverse momentum distributions for J/Psiยดs and Upsilons, and excited states. Our results are compared to recent experimental data (ALICE and LHCb), and...Go to contribution page
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Hao Qiu (LBNL, CA (US))04/08/2016, 18:20Heavy IonsOral PresentationHeavy quarks are produced by hard processes early in the collision at RHIC energy, and their interaction with the QCD medium is sensitive to the medium properties. The suppression pattern of heavy quarkonia also carries information about the Quark Gluon Plasma. In this talk we will report selected new measurements of open and hidden heavy flavor hadrons from the STAR experiment, especially...Go to contribution page
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Dr Hiroshi Ohno (Center for Computational Sciences, University of Tsukuba)04/08/2016, 18:40Heavy IonsOral PresentationWe investigate charmonium and bottomonium correlation and spectral functions in lattice QCD at finite temperature to understand in-medium properties of charmonia and bottomonia as well as the heavy quark diffusion. Our simulations with the quenched approximation are performed on large isotropic lattices with a couple of lattice spacings towards the continuum limit. At temperatures in a range...Go to contribution page
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Yadav Pandit (University of Illinois at Chicago)05/08/2016, 14:30Heavy IonsOral PresentationThe Beam Energy Scan (BES) program at the Relativistic Heavy Ion Collider (RHIC) is mainly focused on a search for the critical point and the phase boundary in the QCD phase diagram. The first exploratory phase of the BES program was successfully completed in 2014, with Au+Au collisions at center-of-mass energies ranging from 7.7 to 200 GeV. In this talk, we report the beam energy...Go to contribution page
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Sandor Katz (Eotvos University)05/08/2016, 14:50Heavy IonsOral PresentationWe calculate the crossover line between the quark gluon plasma and the hadron gas phases for small real chemical potentials using lattice calculations. Since direct calculations at non-vanishing chemical potentials are hindered by the sign problem we use imaginary chemical potentials and perform analytic continuation to obtain the real $\mu$ phase diagram. We use a 4stout staggered fermion...Go to contribution page
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Michele Mesiti (University of Pisa and INFN - Sezione di Pisa, Italy)05/08/2016, 15:10Heavy IonsOral PresentationThe study of the temperature - baryon chemical potential $T-\mu_B$ phase diagram of strongly interacting matter is being performed both experimentally and by theoretical means. The comparison between the experimental chemical freeze-out line and the crossover line, corresponding to chiral symmetry restoration, is one of the main issues. In this talk I will present our recent determination of...Go to contribution page
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Attila Pasztor (Wuppertal University)05/08/2016, 15:30Heavy IonsOral Presentation
We calculate fluctuations and correlations of conserved charges
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in finite temperature QCD up to sixth order. These are interesting
for their sensitivity to criticality, for probing the relevant
degrees of freedom in the QCD medium, for providing stringent
tests on the hadron resonance gas model at low and resummed
perturbation theory at high temperatures, and for being accessible
to heavy ion... -
Abhisek Sen (Georgia State University)05/08/2016, 15:50Heavy IonsOral PresentationsPHENIX is a proposal for a second generation experiment at RHIC capable of measuring jets, jet correlations and upsilons to determine the temperature dependence of transport coefficients of the quark-gluon plasma using electromagnetic and hadronic calorimetry and precision tracking. The physics program focuses on systematic measurements near the transition temperature at RHIC with a detector...Go to contribution page
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Prof. Anna Stasto (Pennsylvania State University)05/08/2016, 16:10Heavy IonsOral PresentationThe LHeC considers electron-ion operation at 0.8 TeV cms energy which extends the kinematic range in deep inelastic lepton-nucleus scattering by 3 orders of magnitude in terms of the 4-momentum transfer $Q^2$ and $1/x$. This also exceeds by far the energy reach of a low energy electron-ion colliders currently under study. The very high energy and luminosity have the potential to thoroughly...Go to contribution page
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Zvi Citron (Weizmann Institute of Science (IL))05/08/2016, 17:00Heavy IonsOral PresentationPhotons and weak bosons do not interact strongly with the dense and hot medium formed in the nuclei collisions, thus should be sensitive to the nuclear modification of parton distribution functions (nPDFs). The in-medium modification of heavy Charmonium states plays an important role in studying the hot and dense medium formed in the larger collision systems. The ATLAS detector, optimized for...Go to contribution page
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Takashi Hachiya (BNL)05/08/2016, 17:20Heavy IonsOral PresentationHeavy quark production in heavy ion collisions has been used as a probe of the strongly coupled quark gluon plasma in two ways. One is the study of the collision centrality and transverse momentum dependence of the modification of open heavy flavor yields in A+A collisions, which provides information about the coupling of the heavy quark to the medium. The other is the study of the...Go to contribution page
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Francesco Bossu (Orsay-LAL)05/08/2016, 17:40Heavy IonsOral PresentationIn 2015, the LHCb experiment has started to acquire data during the ion-ion runs of the LHC. In this talk we present the results of the first data analyses and discuss the prospects for the LHCb ion-ion collision programme.Go to contribution page
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Marta Verweij (CERN)05/08/2016, 18:00Heavy IonsOral PresentationHigh pT jet and hadron studies provide experimental means to explore the energy loss mechanisms in QCD matter. CMS is particularly suitable for those measurements. In this talk, an overview of recent jet and high-pT measurements from pp, pPb and PbPb collisions with the CMS detector will be presented. The latest CMS jet results from PbPb collisions at 5.02 TeV and the plan for future analyses...Go to contribution page
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Martin Spousta (Charles University)05/08/2016, 18:20Heavy IonsOral PresentationJets provide a powerful tool for probing the dynamics of the quark-gluon plasma created in Pb+Pb collisions at the LHC. The modification of high-pT jets as they propagate in the quark-gluon plasma provides insight on structure of the plasma at short-length scale. Such modifications have been observed in a variety of measurements of single jet, dijet, photon-jet and charged-particle...Go to contribution page
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Krzysztof Kutak (Instytut Fizyki Jadrowej Polskiej Akademii Nauk)05/08/2016, 18:40Heavy IonsOral PresentationWe study forward dijet production in dilute-dense hadronic collisions. By considering the appropriate limits, we show that both the transverse-momentum-dependent (TMD) and the high-energy factorization formulas can be derived from the Color Glass Condensate framework. We propose a new formula for forward dijets that encompasses both situations and is therefore applicable regardless of the...Go to contribution page
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Davide Caffarri (CERN)06/08/2016, 14:00Heavy IonsOral PresentationThe heavy-ion physics program at the LHC aims at characterizing the high energy density, high temperature, deconfined partonic state of matter called Quark-Gluon Plasma. Hard probes are very useful tools to study the QGP properties since they are abundantly produced at the LHC energy regime, via hard scattering processes, and they experience the full evolution of the system, losing energy...Go to contribution page
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Dr Yang-Ting Chien (Los Alamos National Laboratory)06/08/2016, 14:20Heavy IonsOral PresentationThe jet quenching phenomena in heavy ion collisions provide a strong evidence of the modification of parton shower in the quark-gluon plasma (QGP). Jet substructure observables can probe various aspects of the jet formation mechanism. They contain useful information about the QGP and allow us to study the medium properties in great details. Here we present theoretical calculations of jet...Go to contribution page
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Nathan Grau (PHENIX)06/08/2016, 14:40Heavy IonsOral PresentationMuch of our understanding of the properties of strongly-coupled quark gluon plasma depend on measurements of particle jets from hard-scattering of nucleons in ion-ionโcollisions.โ Measurements of jet and particle yields as a function of transverse momentum and collision centrality have shown strong path-length-dependent energy loss of partons traversing the medium.โ Recently, measurements of...Go to contribution page
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Dr NIHAR RANJAN SAHOO (Texas A&M University)06/08/2016, 15:00Heavy IonsOral PresentationHard probes created through large momentum transfers are used to study the properties of QCD matter created in heavy-ion collisions, by comparing the measurements to those in p+p collisions. Jets, and the "quenching" or suppression of jets in the medium created in heavy-ion collisions, are studied through various observables. We present the recent measurements from...Go to contribution page
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Andrey Sadofyev (MIT)06/08/2016, 15:20Heavy IonsOral PresentationWe use holography to analyze the evolution of an ensemble of jets, with an initial probability distribution for their energy and opening angle as in proton-proton (pp) collisions, as they propagate through an expanding cooling droplet of strongly coupled plasma as in heavy ion collisions. We identify two competing effects: (i) each individual jet widens as it propagates; (ii) the opening angle...Go to contribution page