Bulletin of the American Physical Society
4th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Volume 59, Number 10
Tuesday–Saturday, October 7–11, 2014; Waikoloa, Hawaii
Session 2WD: Quark Gluon Plasma and Future Directions in Heavy Ion Physics at RHIC and LHC |
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Chair: Tatsuya Chujo, University of Tsukuba Room: Kohala 4 |
Tuesday, October 7, 2014 2:00PM - 2:30PM |
2WD.00001: Collective properties from RHIC to LHC Invited Speaker: Paul Sorensen The collectivity exhibited amongst particles produced in Nucleus-Nucleus collisions shows similar features across a range of center-of-mass energies from 7.7 GeV to 2.76 TeV. This similarity is considered surprising to many in the field and the question arises, why don't we see the turn-off of the QGP. In this talk I will review the relevant measurements and point out that data show interesting features indicative of the disappearance of QGP in lower energies and smaller systems. [Preview Abstract] |
Tuesday, October 7, 2014 2:30PM - 3:00PM |
2WD.00002: TBD Invited Speaker: Brian Cole |
Tuesday, October 7, 2014 3:00PM - 3:30PM |
2WD.00003: Electromagnetic probes and heavy flavor from RHIC to LHC Invited Speaker: Yasuyuki Akiba It is now well established that strongly-interacting quark gluon plasma (sQGP) is formed in heavy ion collisions at RHIC. This discovery is confirmed at LHC, where a QGP with three times higher energy density is formed. Electromagnetic probes (direct photons and lepton pairs) and heavy quarks ($c$ and $b$ quarks and $c\bar{c}$ and $b\bar{b}$ bound states) have central roles to investigate the properties of the QGP. In this talk, I review experimental study of QGP at RHIC and LHC with electromagnetic probes and heavy quark probes. [Preview Abstract] |
Tuesday, October 7, 2014 3:30PM - 4:00PM |
2WD.00004: COFFEE BREAK
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Tuesday, October 7, 2014 4:00PM - 4:30PM |
2WD.00005: Beam Energy Scan at RHIC Invited Speaker: Hiroshi Masui The purpose of Beam Energy Scan (BES) program at Relativistic Heavy Ion Collider (RHIC) is to study the structure of QCD phase diagram. There are 3 main goals of BES to search for (1) signal of disappearance of Quark Gluon Plasma, (2) boundary for the first order phase transition and (3) signal of QCD critical point. First phase of BES (BES-I) at RHIC was carried out in year 2010 and 2011, and covered center of mass beam energies from 7.7 to 62.4 GeV. We observed changes in behavior for many different observables below 20 GeV, such as azimuthal anisotropy, conserved charge fluctuations and so on. Based on the results at BES-I, the RHIC community has decided to carry out the next Beam Energy Scan (BES-II) to focus on beam energy below 20 GeV. The purpose of BES-II is the precision measurements which allow us for comprehensive understanding of the QCD phase at high baryon density. In this talk, I'm going to review selected results from BES-I and discuss what we have learned along with the goals mentioned earlier. I'm also going to discuss the BES-II, which will start in 2018, what we could achieve for several different observables with the accelerator upgrade at RHIC as well as the detector upgrades at PHENIX and STAR. [Preview Abstract] |
Tuesday, October 7, 2014 4:30PM - 5:00PM |
2WD.00006: Experimental Upgrades at RHIC and LHC Invited Speaker: Taku Gunji Elucidating the properties of the hot and dense QCD matter is one of the major scientific subjects in nuclear physics. Relativistic heavy-ion collisions have been unique tools to study the hot and dense QCD medium in the laboratory. After many experimental exciting discoveries at RHIC and LHC, the most important scientific challenges in the next decade is to quantify the properties of the hot and dense QCD medium preciously. The quantitative understanding of the medium properties requires the precision measurements of sensitive observables. This will be made possible with the upgrades of the experiments and the accelerators. In this presentation, the experimental upgrade programs at RHIC and LHC will be presented and future physics perspectives towards the precision measurements will be shown. [Preview Abstract] |
Tuesday, October 7, 2014 5:00PM - 5:30PM |
2WD.00007: Theoretical summary on QGP at RHIC and LHC and future Invited Speaker: Jingeng Liao Relativistic heavy ion collision experiments at RHIC and LHC have produced a wealth of data that have allowed quantifying properties of hot QCD matter and understanding its fundamental structure in the temperature regime at the order of $\Lambda_{QCD}$. In this talk I discuss recent theoretical/phenomenological progress, with an emphasis on insights from contrasting empirical observations at varied collision energies. While a low-viscosity and color-opaque matter has been observed at both RHIC and LHC, evidences are gathering to indicate at a considerable change of the QGP transport properties in a relatively narrow temperature span. I will discuss these evidences and how such observation may connect with our understanding of one fundamental aspect of QCD, the confinement transition. Another fundamental aspect of QCD, chiral symmetry breaking and restoration, suggests specific chiral effects that may become observable at RHIC and LHC, such as a number of anomalous effects and the chiral critical point. I will discuss the search of these effects by tuning beam energy across a wide window. The importance and challenge of understanding and constraining the very early stages of heavy ion collisions, such as initial fluctuations and pre-equilibrium evolutions, have become widely appreciated in the past few years. I will discuss the status of ongoing efforts in bridging the gap between the collision moment and the emergence of hydrodynamic expansion. Finally, I will discuss critical theoretical issues to be addressed as well as key experimental measurements to be made in the future. [Preview Abstract] |
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