论文标题
对主要相关因子的灵敏度研究，用于表征手性磁性电荷分离
A sensitivity study of the primary correlators used to characterize chiral-magnetically-driven charge separation
论文作者
论文摘要
多相传输（AMPT）模型用于研究两个主要相关因子的检测灵敏度-U $Δγ$和$ r_ {ψ_{2}} $ - 用于表征由手感磁效应引起的电荷分离（CME）。该研究相对于不同输入“ CME信号”的几个事件平面进行的研究表明，分数$ f _ {\ rm cme} =δγ_{\ rm cme}/δγ$的检测阈值，这使得$ -Correlator nim nem-correlator nim a_1 2.5 \％$，大于离子离子（等含量）碰撞的声称的信号（信号差）。相比之下，$ r_ {ψ_{2}} $相关器指示具有反宽度的凹形分布（$ \ mathrm {σ^{ - 1} _ {r_ {ar_ {ψ_2}}}} $），这些分布与$ a_1 $的表现均与$ a_1 $相比，并独立于该事件。 $ r_ {ψ_{2}} $相关器对最小CME驱动的电荷分离的敏感性在存在现实背景的情况下，可以帮助更好地表征重合离子碰撞中CME的表征。
A Multi-Phase Transport (AMPT) model is used to study the detection sensitivity of two of the primary correlators -- $Δγ$ and $R_{Ψ_{2}}$ -- employed to characterize charge separation induced by the Chiral Magnetic Effect (CME). The study, performed relative to several event planes for different input "CME signals", indicates a detection threshold for the fraction $f_{\rm CME}=Δγ_{\rm CME}/Δγ$, which renders the $Δγ$-correlator insensitive to values of the Fourier dipole coefficient $a_1 \lesssim 2.5\%$, that is larger than the purported signal(signal difference) for ion-ion(isobaric) collisions. By contrast, the $R_{Ψ_{2}}$ correlator indicates concave-shaped distributions with inverse widths ($\mathrm{σ^{-1}_{R_{Ψ_2}}}$) that are linearly proportional to $a_1$, and independent of the character of the event plane used for their extraction. The sensitivity of the $R_{Ψ_{2}}$ correlator to minimal CME-driven charge separation in the presence of realistic backgrounds, could aid better characterization of the CME in heavy-ion collisions.
