Bulletin of the American Physical Society
2010 Fall Meeting of the APS Division of Nuclear Physics
Volume 55, Number 14
Tuesday–Saturday, November 2–6, 2010; Santa Fe, New Mexico
Session JA: Heavy Flavor Results at RHIC |
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Chair: Steffen Bass, Duke University Room: Sweeny A |
Friday, November 5, 2010 2:00PM - 2:36PM |
JA.00001: Production of heavy quarks in high energy nuclear collisions Invited Speaker: Studying heavy quarks and quarkonia is one of the most efficient tools for analyzing the properties of the dense nuclear matter formed in high energy nuclear collisions. In my talk I will review the current theoretical understanding of the open and hidden flavor production mechanisms, discuss the outstanding problems and report on the recent progress in unveiling the role of the quantum coherence in high energy quarkonium production. [Preview Abstract] |
Friday, November 5, 2010 2:36PM - 3:12PM |
JA.00002: Heavy quarkonium as a probe of the Quark-Gluon Plasma Invited Speaker: It was first proposed by Matsui and Satz in 1986 that a clear signal of deconfinement in high energy heavy ion collisions would be suppression of the yield of J/$\psi$ mesons caused by those hadrons ``melting'' in the Quark-Gluon Plasma. Since then, there has been strong theoretical and experimental interest in the use of bound heavy quark states (charmonia and bottomonia) as a probe of the QGP. Because of their large masses, charm and bottom quark pairs are produced only in hard scatterings during the initial nuclear collision, so their population is fixed and predictable. Some of the quarkonia states have significant branches directly to di-lepton pairs, making them easy to reconstruct even in heavy ion collisions. There have been measurements of J/$\psi$ production in heavy ion collisions first at lower energies at the CERN SPS, and more recently at RHIC. All show strong suppression. However the amount of suppression observed at the SPS and at different rapidities at RHIC has shown no easily understood pattern, and in fact the observed trends are somewhat counter-intuitive. In the last year or so it has been shown experimentally that there are large effects on J/$\psi$ production rates in heavy ion collisions that are not related to the hot, dense final state. These are termed ``cold nuclear matter'' effects and they are very interesting in their own right. I will discuss how these recent measurements have clarified the previously confusing experimental picture for J/$\psi$ production, and discuss the status and outlook for quarkonia as a probe of the QGP at the SPS, RHIC and the LHC. [Preview Abstract] |
Friday, November 5, 2010 3:12PM - 3:48PM |
JA.00003: Measurements of Open Heavy flavor production at RHIC Invited Speaker: Heavy quarks are unique probes to study the strongly coupled Quark-Gluon Plasma created at RHIC. Unlike light quarks, heavy quark masses come mostly from spontaneous symmetry breaking, which makes them ideal for studying the medium's QCD properties. Due to their large masses, they are produced early in the collisions and are expected to interact with the medium quite differently from that of light quarks. As for heavy quarkonia, detailed studies of the open heavy flavor mesons production in heavy-ion collisions and the baseline $p+p$ and $d+A$ collisions provide crucial information in understanding the medium's properties. With the current detector configurations and future silicon detector and luminosity upgrade, RHIC experiments have or will have the capability to measure open heavy flavors production in all different directions with high precision. In this talk, I will review the current status as well as the future perspectives on the studies of open heavy flavor production at RHIC. [Preview Abstract] |
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