标题： 利用$φ$-介子椭圆流来绘制部分子相互作用强度的地图 显示英文标题

标题： Using the $φ$-meson elliptic flow to map the strength of partonic interaction

摘要： 汇总了最近测量的STAR数据，包括相对论重离子对撞机（RHIC）束流能量扫描计划中 $\phi$介子的椭圆流 ( $v_{2}$)，并与多相输运模型（AMPT）进行了比较。在 $\sqrt{s_{NN}}$ $\geq$ 19.6 GeV处的实验数据与AMPT模型的弦熔化版本吻合良好。 该模型包含了部分子相互作用以及夸克凝聚作为强子化机制。 这表明在 $\sqrt{s_{NN}}$ $\geq$19.6 GeV处，部分子相互作用对集体流有相当大的贡献。 在$\sqrt{s_{NN}}$= 7.7 和 11.5 GeV 测得的$\phi$- 介子$v_{2}$的结果小于无部分子相互作用的 AMPT 模型得到的结果。这表明在$\sqrt{s_{NN}}$ $\leq$ 11.5 GeV 处观测到的$\phi$- 介子$v_{2}$的部分子集体效应贡献可以忽略不计。 显示英文摘要

摘要： A compilation of recently measured STAR data for elliptic flow ($v_{2}$) of $\phi$ mesons in RHIC Beam Energy Scan program and comparison with a multiphase transport model (AMPT) has been presented. The experimental data at $\sqrt{s_{NN}}$ $\geq$ 19.6 GeV agrees well with string melting version of the AMPT model. The model includes partonic interactions and quark coalescence as a mechanism of hadronization. This indicates that there is a substantial contribution to collectivity from partonic interactions at $\sqrt{s_{NN}}$ $\geq$ 19.6 GeV. The measured $\phi$-meson $v_{2}$ at $\sqrt{s_{NN}}$ = 7.7 and 11.5 GeV are found to be smaller than those obtained from AMPT model without partonic interactions. This indicates negligible contribution of partonic collectivity to the observed $\phi$-meson $v_{2}$ at $\sqrt{s_{NN}}$ $\leq$ 11.5 GeV.