Charge-dependent correlations in heavy-ion collisions from stochastic hydrodynamics

• 来源期刊: 理论物理通讯（英文版）
• 年，卷（期）: 2020,（11）
• 所属期刊栏目: NUCLEAR PHYSICS
• 页码范围: 80-86
• 页数: 7页
• 语种: 英文

摘要

Charge-dependent correlations from both background and charge separation contribute to experimental observables in heavy-ion collisions.In this paper,we use stochastic hydrodynamics to study background charge asymmetry due to fluctuations.Using the rapidity-dependent correlation and a simple ansatz for particle distributions,we find a fluctuation-induced correlation to provide a type of background F-correlation.Experimental data for Au+Au collisions at √SNN =200 GeV are compared.We also make predictions for F-correlations in isobar collisions.Combining this with our previous chiral magnetic effect results,we obtain δ-correlations for collisions in the three types of system.Computations from our model show an almost identical background with less than 2％ difference for isobars,but roughly 10％ difference for their charge separations.In combination with our earlier works,we provide a consistent method of calculating both the chiral magnetic effect and the charged background in the context of stochastic hydrodynamics.