Implications of the isobar-run results for the chiral magnetic effect in heavy-ion collisions

被引：20

作者：

Kharzeev, Dmitri E. ^{[1
,2
]}

Liao, Jinfeng ^{[3
,4
]}

Shi, Shuzhe ^{[1
]}

机构：

[1] SUNY Stony Brook, Ctr Nucl Theory, Dept Phys & Astron, Stony Brook, NY 11794 USA

[2] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[3] Indiana Univ, Phys Dept, 2401 N Milo B Sampson Lane, Bloomington, IN 47408 USA

[4] Indiana Univ, Ctr Explorat Energy & Matter, 2401 N Milo B Sampson Lane, Bloomington, IN 47408 USA

来源：

PHYSICAL REVIEW C | 2022年 / 106卷 / 05期

关键词：

PARITY VIOLATION; EVENT; QCD;

D O I：

10.1103/PhysRevC.106.L051903

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The chiral magnetic effect (CME) is a macroscopic transport phenomenon induced by a quantum anomaly in the presence of chiral imbalance and an external magnetic field. Relativistic heavy ion collisions provide the unique opportunity to look for CME in a non-Abelian plasma, where the chiral imbalance is created by topological transitions similar to those occurring in the early universe. The isobar run at Relativistic Heavy Ion Collider was proposed as a way to separate the possible CME signal driven by magnetic field from the background. The first blind analysis results from this important experiment were recently released by the STAR Collaboration. Under the pre-defined assumption of identical background in RuRu and ZrZr, the results are inconsistent with the presence of CME, as well as with all existing theoretical models (whether including CME or not). However the observed difference of backgrounds must be taken into account before any physical conclusion is drawn. In this paper, we show that once the observed difference in hadron multiplicity and collective flow are quantitatively taken into account, the STAR results could be consistent with a finite CME signal contribution of about (6.8 & PLUSMN; 2.6)%.

引用

页数：7

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