Elliptic flow of $φ$ meson and strange quark collectivity at RHIC

Details Elliptic flow of $φ$ meson and strange quark collectivity at RHIC Elliptic flow of $φ$ meson and strange quark collectivity at RHIC

2005-04-17

arxiv.org/abs/nucl-th/0504055v3

Physical Review C 74, 064902 (2006)

Physics

Nuclear Physics

Nuclear Theory

5 pages and 5 figures; accepted by Physical Review C

Scientific paper

10.1103/PhysRevC.74.064902

Based on A Multi-Phase Transport (AMPT) model, we have studied the elliptic flow $v_{2}$ of $\phi$ mesons from reconstructed $K^{+}K^{-}$ decay channel at the top Relativistic Heavy Ion Collider energy at Brookhaven National Laboratory. The dependences of $v_{2}$ on transverse momentum $p_T$ and collision centrality are presented and the rescattering effect of $\phi$ mesons in the hadronic phase is also investigated. The results show that experimental measurement of $v_{2}$ for $\phi$ mesons can retain the early collision information before $\phi$ decays and that the $\phi$ $v_2$ value obeys the constituent quark number scaling which has been observed for other mesons and baryons. Our study indicates that the $\phi$ $v_2$ mostly reflects partonic level collectivity developed during the early stage of the nucleus-nucleus collision and the strange and light up/down quarks have developed similar angular anistropy properties at the hadronization.

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