论文标题
滑动哑铃方法在重离子碰撞中搜索CME
Sliding Dumbbell Method to search for the CME in heavy ion collisions
论文作者
论文摘要
这项研究探讨了超偏见的重离子碰撞中的手性磁效应（CME）。 The CME, observed as back-to-back charge separation along the magnetic field axis, is investigated using the newly developed Sliding Dumbbell Method (SDM) applied to Au+Au events at a center-of-mass energy $\sqrt{s}_{\mathrm{NN}}$ = 200 GeV generated by the AMPT model with string melting configuration.通过垂直于反应平面的成对颗粒的翻转电荷，将类似CME的信号外部注射到事件中。该研究报告说，在给定的碰撞中心，对CME敏感的3颗粒$γ$相关器的显着增强。此外，在同步电荷对的$ \ sqrt {|γ|} $相关器之间观察到线性关系，而在CME-Enriched子群中，整个哑铃都在哑铃之间观察到$ \ sqrt {|γ|} $相关器。此外，在$δγ$中的CME的比例（相反和同一符号之间的差异$γ$相关器之间的差异）在不同百分比的外部注射的CME样信号的不同碰撞中心中呈现。总体而言，该研究旨在通过创新的实验方法和事件结构的详细分析来理解和检测手性磁效应。
This study explores the Chiral Magnetic Effect (CME) in ultra-relativistic heavy-ion collisions. The CME, observed as back-to-back charge separation along the magnetic field axis, is investigated using the newly developed Sliding Dumbbell Method (SDM) applied to Au+Au events at a center-of-mass energy $\sqrt{s}_{\mathrm{NN}}$ = 200 GeV generated by the AMPT model with string melting configuration. The CME-like signal is externally injected in events by flipping charges of pairs of the particles perpendicular to the reaction plane. The study reports a significant enhancement of the CME-sensitive 3-particle $γ$ correlator in events with high back-to-back charge separation, in a given collision centrality. Additionally, a linear relationship is observed between the $\sqrt{|γ|}$ correlator for same-sign charge pairs and positive charge asymmetry ($\langle A{^+}\rangle$) across the dumbbell in CME-enriched sub-samples. Furthermore, the fraction of CME in $Δγ$ (difference between opposite and same sign $γ$ correlators) is presented across different collision centralities having different percentages of externally injected CME-like signal. Overall, the research aims to understand and detect the Chiral Magnetic Effect through innovative experimental method and detailed analysis of event structure.
