重离子碰撞中存在马赫锥吗?由STAR计算三粒子关联
Are There Mach Cones in Heavy Ion Collisions? Three-Particle Correlations from STAR
摘要:
本文给出了一个$3<p_T<4$ GeV/c触发粒子和两个较软的$1<p_T<2$ GeV/c粒子的STAR三粒子方位角关联的结果。结果显示pp,d+Au和高统计Au+Au碰撞在$\sqrt{s_{NN}}=200 GeV$。我们观察到的3粒子相关中心金+金碰撞,这可能表明存在的锥形发射。此外,观察到的信号角位置对伴随粒子的$p_T$的依赖关系可以用来区分锥形流和简单的QCD-Čerenkov辐射。分析的一个重要方面是组合背景的减法。系统的不确定性,由于这种减法和流量谐波$v_2$和$v_4$进行了详细研究。
英文摘要:
We present results from STAR on 3-particle azimuthal correlations for a $3<p_T<4$ GeV/c trigger particle with two softer $1<p_T<2$ GeV/c particles. Results are shown for pp, d+Au and high statistics Au+Au collisions at $\sqrt{s_{NN}}=200 GeV$. We observe a 3-particle correlation in central Au+Au collisions which may indicate the presence of conical emission. In addition, the dependence of the observed signal angular position on the $p_T$ of the associated particles can be used to distinguish conical flow from simple QCD-Čerenkov radiation. An important aspect of the analysis is the subtraction of combinatorial backgrounds. Systematic uncertainties due to this subtraction and the flow harmonics $v_2$ and $v_4$ are investigated in detail.
机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。