paper

Heavy quark flow as better probes of QGP properties

arXiv:1912.02115 · doi:10.1051/epjconf/201817119005

Abstract

In earlier studies we have proposed that most parton $v_{2}$ comes from the anisotropic escape of partons, not from the hydrodynamic flow, even for semi-central Au+Au collisions at $s_{N N} = 200$ GeV. Here we study the flavor dependence of this escape mechanism with a multi-phase transport model. In contrast to naive expectations, we find that the charm $v_{2}$ is much more sensitive to the hydrodynamic flow than the lighter quark $v_{2}$ , and the fraction of $v_{2}$ from the escape mechanism decreases strongly with the quark mass for large collision systems. We also find that the light quark collective flow is essential for the charm quark $v_{2}$ . Our finding thus suggests that heavy quark flows are better probes of the quark-gluon-plasma properties than light quark flows.

4 pages, 3 figures, 1 table. Contribution to the proceedings of the 17th International Conference on Strangeness in Quark Matter (SQM 2017), July 10-15, 2017, Utrecht, the Netherlands