Charm elliptic flow at RHIC

Details Charm elliptic flow at RHIC Charm elliptic flow at RHIC

2005-02-18

arxiv.org/abs/nucl-th/0502056v2

Phys.Rev. C72 (2005) 024906

Physics

Nuclear Physics

Nuclear Theory

Scientific paper

10.1103/PhysRevC.72.024906

Charm elliptic flow in heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC) is studied in a multiphase transport model. Assuming that the cross section for charm quark scattering with other light quarks is the same as that between light quarks, we find that both charm and light quark elliptic flows are sensitive to the value of the cross section. Compared to that of light quarks, the elliptic flow of charm quarks is smaller at low transverse momentum but approaches comparable values at high transverse momentum. Similar features are seen in the elliptic flow of charmed mesons as well as that of the electrons from their semileptonic decays when the charmed mesons are produced from quark coalescence during hadronization of the partonic matter. To describe the large electron elliptic flow observed in available experimental data requires a charm quark scattering cross section that is much larger than that given by the perturbative QCD.

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