Effects of equation of state on nuclear suppression and the initial entropy density of quark gluon plasma

2011/10/03 by Surasree Mazumder, Jan-e Alam, Jan‐e Alam · 3 citations
Physics and Astronomy · #Entropy (arrow of time) #Gluon #High-Energy Particle Collisions Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Plasma #Quantum Chromodynamics and Particle Interactions #Quantum electrodynamics #Quark #Quark–gluon plasma #Thermodynamics #hep-ph #nucl-ex #nucl-th

paper · pdf · doi:10.1103/physrevc.85.044918

published in Physical Review C 85(4) (American Institute of Physics)

arxiv created 2011/10/03 · openalex publication_date 2012/04/17 · arxiv updated 2012/04/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We study the effects of the equation of state on the nuclear suppression of heavy flavors in quark gluon plasma and estimate the initial entropy density of the system produced in Au + Au collision at the highest Relativistic Heavy Ion Collider (RHIC) energy. For this purpose the experimental data on the charged-particle multiplicity and the nuclear suppression of single-electron spectra originating from the semileptonic decays of open charm and beauty mesons have been employed. We have used inputs from lattice QCD to minimize the model dependence of the results. We obtain the value of the initial entropy density, which varies from 20 to 59/fm³ depending on the value of the velocity of sound that one uses for the analysis. Our investigation leads to a conservative value of the initial entropy density of \ensuremath∼20/fm³ with a corresponding initial temperature of \ensuremath∼210 MeV, which is well above the value of the transition temperature predicted by lattice QCD.

Citations

• Toward an understanding of the single electron data measured at the BNL Relativistic Heavy Ion Collider (RHIC)
• Anomalous mass dependence of radiative quark energy loss in a finite-size quark-gluon plasma
• Nonperturbative Heavy-Quark Diffusion in the Quark-Gluon Plasma
• Heavy Quark Energy Loss in a Nuclear Medium
• From a colored glass condensate to the gluon plasma: Equilibration in high energy heavy ion collisions
• Momentum dependence of drag coefficients and heavy flavor suppression in quark gluon plasma
• Nonstationary irreversible thermodynamics: A causal relativistic theory
• Midrapidity Neutral-Pion Production in Proton-Proton Collisions ats=200 GeV
• Experimental and theoretical challenges in the search for the quark–gluon plasma: The STAR Collaboration's critical assessment of the evidence from RHIC collisions