论文标题
RHIC中异荷碰撞中手性磁效应的非流量基线的估计
Estimate of a nonflow baseline for the chiral magnetic effect in isobar collisions at RHIC
论文作者
论文摘要
最近，Star报告了ISOBAR（$ {^{96} _ {44} \ text {ru}}}}+{^{96} _ {44} \ text {ru}}} $， $ {^{96} _ {40} \ text {zr}}}+{^{96} _ {40} \ text {zr}} $）的结果，用于手性磁效果（CME）搜索。观察到椭圆方差（$ v_ {2} $）标准化的CME敏感$Δγ$的RU+RU与ZR+ZR比率接近逆多重性（$ n $）比。换句话说，$nδγ/v_ {2} $可观察的比率接近统一的天真背景基线。但是，预计非流相关性会导致基线偏离统一。为了进一步了解ISOBAR结果，我们将非流量贡献分解为$Nδγ/ V_ {2} $（ISOBAR比率）分为三个术语，并通过在$ v_ {2} $测量中使用非流量来量化每个项，并将其发布的恒星数据和Hijing Simulation量化。从这些研究中，我们估计了CME的等异叠剂比为$nδγ/ v_ {2} $的非流量基线，并讨论其含义。
Recently, STAR reported the isobar (${^{96}_{44}\text{Ru}}+{^{96}_{44}\text{Ru}}$, ${^{96}_{40}\text{Zr}}+{^{96}_{40}\text{Zr}}$) results for the chiral magnetic effect (CME) search. The Ru+Ru to Zr+Zr ratio of the CME-sensitive observable $Δγ$, normalized by elliptic anisotropy ($v_{2}$), is observed to be close to the inverse multiplicity ($N$) ratio. In other words, the ratio of the $NΔγ/v_{2}$ observable is close to the naive background baseline of unity. However, nonflow correlations are expected to cause the baseline to deviate from unity. To further understand the isobar results, we decompose the nonflow contributions to $NΔγ/ v_{2}$ (isobar ratio) into three terms and quantify each term by using the nonflow in $v_{2}$ measurement, published STAR data, and HIJING simulation. From these studies, we estimate a nonflow baseline of the isobar ratio of $N Δγ/ v_{2}$ for the CME and discuss its implications.
