A systematical study of the chiral magnetic effects at the RHIC and LHC energies

TL;DR

This study systematically analyzes the chiral magnetic effect (CME) at RHIC and LHC energies, comparing theoretical predictions with experimental data, and explores the energy dependence and time evolution of the electromagnetic current in quark-gluon plasma.

Contribution

It provides a comprehensive theoretical analysis of CME signals across different energies and centralities, aligning with experimental observations and highlighting the energy where CME effects are maximal.

Findings

CME signals show centrality and energy dependence consistent with experiments.

The electromagnetic current peaks near 39 GeV collision energy.

Qualitative agreement between theoretical trends and experimental charge correlations.

Abstract

Considering the magnetic field response of the QGP medium, we perform a systematical study of the chiral magnetic effect(CME), and make a comparison it with the experimental results for the background-subtracted correlator $H$ at the energies of the RHIC Beam Energy Scan (BES) and LHC energy. The CME signals from our computations show a centrality trend and beam energy dependence that are qualitatively consistent with the experimental measurements of the charge dependent correlations. The time evolution of the chiral electromagnetic current at the RHIC and LHC energies is systematically studied. The dependence of the time-integrated current signal on the beam energy $\sqrt{s}$ with different centralities is investigated. Our phenomenological analysis shows that the time-integrated electromagnetic current is maximal near the collision energy $\sqrt{s} \approx 39$ GeV. The qualitative trend of the induced electromagnetic current is in agreement with the CME experimental results at the RHIC and LHC energies.