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arXiv 2110.01435nucl-thhep-exnucl-ex
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利用事例形状研究重离子碰撞中的手征磁效应

Utilization of Event Shape in Search of the Chiral Magnetic Effect in Heavy-ion Collisions

Ryan Milton, Gang Wang, Maria Sergeeva, Shuzhe Shi, Jinfeng Liao, Huan Zhong Huang

摘要:

手征磁效应是高能重离子碰撞物理领域的一个重要研究课题,人们提出了多种观测量来研究手征磁效应。实验观测值经常被碰撞系统的集体运动(特别是椭圆流)所产生的背景贡献所污染。我们提出了一种方法研究的事件形状工程(ESE),项目的CME敏感的$γ_{112}$相关器及其变化($γ_{132}$和$γ_{123}$)的一类事件与最小流量。我们讨论了零流模式的实现,对CME信号的灵敏度,和相应的统计意义,在$\sqrt{s_{\rm NN}} = 200$ GeV的Au+Au,Ru+Ru,Zr+Zr碰撞的多相输运(AMPT)模型,以及一个新的事件发生器,事件-事件异常粘性流体动力学(EBE-AVFD)。

英文摘要:

The search for the chiral magnetic effect (CME) has been a subject of great interest in the field of high-energy heavy-ion collision physics, and various observables have been proposed to probe the CME. Experimental observables are often contaminated with background contributions arising from collective motions (specifically elliptic flow) of the collision system. We present a method study of event-shape engineering (ESE) that projects the CME-sensitive $γ_{112}$ correlator and its variations ($γ_{132}$ and $γ_{123}$) to a class of events with minimal flow. We discuss the realization of the zero-flow mode, the sensitivity on the CME signal, and the corresponding statistical significance for Au+Au, Ru+Ru, and Zr+Zr collisions at $\sqrt{s_{\rm NN}} = 200$ GeV with a multiphase transport (AMPT) model, as well as a new event generator, Event-By-Event Anomalous-Viscous Fluid Dynamics (EBE-AVFD).

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。

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