62和200 GeV距STAR的Au-Au碰撞中微喷流角关联的反常中心性变化
Anomalous centrality variation of minijet angular correlations in Au-Au collisions at 62 and 200 GeV from STAR
摘要：
我们用62和200 GeV的金金碰撞产生的$p_{t}$ $>$ 0. 15 GeV/c和$| η|$ $<$ 1测量了STAR中所有带电强子的二维自相关.在$η$和$ϕ$上，相关结构主要由以零相对开度角为中心的峰所支配，我们假设这是由最小偏置喷流（minijets）引起的。我们观察到一个很大的过剩的minijet的相关性在更中心的金-金碰撞相对于二进制碰撞缩放（更多的相关对比预期的表面发射，甚至体积发射）。我们还观察到一个突然增加的微型喷流峰值振幅和$η$宽度相对于二进制碰撞标度的散射部分子发生在一个能量依赖的中心点。有一个可能的比例的过渡点与横向粒子密度。
英文摘要：
We have measured 2D autocorrelations for all charged hadrons in STAR with $p_{t}$ $>$ 0.15 GeV/c and $| η|$ $<$ 1 from Au+Au collisions at 62 and 200 GeV. The correlation structure is dominated by a peak centered at zero relative opening angles on $η$ and $ϕ$ which we hypothesize is caused by minimum-bias jets (minijets). We observe a large excess of minijet correlations in more-central Au-Au collisions relative to binary-collision scaling (more correlated pairs than expected from surface emission or even volume emission). We also observe a sudden increase of the minijet peak amplitude and $η$ width relative to binary-collision scaling of scattered partons which occurs at an energy-dependent centrality point. There is a possible scaling of the transition point with transverse particle density.
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。
