High Energy HeavyIon Collisions fro RHIC to LHC高能重离子碰撞从RHIC的大型强子对撞机.pptVIP

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High Energy HeavyIon Collisions fro RHIC to LHC高能重离子碰撞从RHIC的大型强子对撞机.ppt

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High Energy HeavyIon Collisions fro RHIC to LHC高能重离子碰撞从RHIC的大型强子对撞机

2003? 10? 8? ????? ???? Present and Future Perspectives of Relativistic Heavy-Ion Collisions ????? ? ? ? Motivation of HI Collisions Investigating the QCD prediction of a deconfined ( chiral symmetry restored) high-energy-density phase of nuclear matter Heavy-Ion Collisions Phases of Nuclear Matter Heavy-Ion Accelerators Relativistic Heavy Ion Collider 1. Deconfinement R(U) ~ 0.13 fm R(J/Y) ~ 0.29 fm R(Y ’ ) ~ 0.56 fm (Electrons, Muons) 2. Chiral Symmetry Restoration Mass, width, branching ratio of F to e+e-, K+K- with dM 5 MeV (Electrons, Muons, Hadrons) Baryon susceptibility, color fluctuations, anti-baryon production (Hadrons) DCC’s, Isospin fluctuations (Photons, Charged Hadrons) 3. Thermal Radiation of Hot Gas Prompt g, Prompt g * to e+e-, m+m - (Photons, Electrons, Muons) 4. Strangeness and Charm Production Production of K+, K- mesons (Hadrons) Production of F, J/Y, D mesons (Electrons, Muons) 5. Jet Quenching High pT jet via leading particle spectra (Hadrons, Photons) 6. Space-Time Evolution HBT Correlations of p± p±, K± K± (Hadrons) Summary: Electrons, Muons, Photons, Hadrons Selected Results Global Features Particle Multiplicity Transverse Energy Flow Identified Particles Hadrons Electrons Studied vs Centrality System Size Beam Energy Particle Multiplicity PHOBOS Compilation (PRL 88, 022302 (2002)) HI is producing more particles than elementary p-p or p-pbar at the same beam energy Event Charaterization Use the combination of Zero Degree Calorimeters (energy of unbound spectator neutrons) Beam-Beam Counters (charged multiplicity) to define centrality classes Use Glauber Modeling to extract the number of participants Global Variables Gluon Saturation? Initial Energy Density QGP Probes Expectation quarks and quarkonium states may respond differently to a plasma compared to ordinary nuclear matter Hard Probes Formed in initial collisions with high Q2 Calculable in pQCD given Parton strunture function Hard scattering rate Fragmentat