Medium effects on charmonium production at ultrarelativistic energies available at the CERN Large Hadron Collider

2014/01/31 by Kai Zhou, Nu Xu, Zhe Xu +1
Engineering · Physics and Astronomy · #Collider #Hadron #High-Energy Particle Collisions Research #Large Hadron Collider #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Production (economics) #Superconducting Materials and Applications #hep-ex #hep-ph #nucl-ex #nucl-th

paper · pdf · doi:10.1103/physrevc.89.054911

published as Phys.Rev.C89,054911(2014) · 11 pages,10 figures

openalex publication_date 2014/05/21 · arxiv created 2014/06/03 · arxiv updated 2014/06/04 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We investigate with a transport approach the cold and hot nuclear matter effects on the charmonium transverse momentum distributions in relativistic heavy ion collisions. The newly defined nuclear modification factor r_AA=\ensuremath⟨p_T²\ensuremath⟩_AA/\ensuremath⟨p_T²\ensuremath⟩_pp and elliptic flow v₂ for J/\ensuremathψ are sensitive to the nature of the hot medium and the thermalization of heavy quarks. From Super Proton Synchrotron (SPS) through Relativistic Heavy Ion Collider (RHIC) to Large Hadron Collider (LHC) colliding energies, we observe dramatic changes in the centrality dependence of r_AA. We find that, at LHC energy, the finally observed charmonia are dominated by the regeneration from thermalized heavy quarks.

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