Exploring the chiral magnetic effect in isobar collisions through Chiral Anomaly Transport

Abstract

We investigate the signal of the chiral magnetic effect (CME) in Au+Au collisions and isobar collisions of ${}_{44}^{96}\text{Ru}+{}_{44}^{96}\mathrm{Ru}$ and ${}_{40}^{96}\text{Zr}+{}_{40}^{96}\mathrm{Zr}$ in the newly developed chiral anomaly transport (CAT) module based on the state-of-the-art model a multiphase transport (AMPT). Our numerical simulation results for the ratio charge correlation $\hat{I}”{\hat{I}}^3$ in Ru+Ru and Zr+Zr collisions are close to the latest experimental data. The simulation shows that the CME signal is larger in Ru+Ru collisions than that in Zr+Zr collisions, while the background is smaller, and the upper limit of the CME signal is $15\%$ in the isobar collisions.

13 pages, 15 figures