Work

Effects of quark gluon plasma droplet evolution on charge separation in small collision systems within a multiphase transport model

Year: 2025

Type: article

Abstract: In relativistic high-energy heavy-ion collisions, the chiral magnetic effect (CME) could produce a charge separation in quark gluon plasma (QGP) and remain in the final hadron system during evolution, observed as the correlator Δ γ . This physics procedure could also occur in small collision systems if the CME were to emerge in the QGP droplet. In this paper, we study the effects of QGP droplet evolution on charge separation in small collision systems, based on a multiphase transport model. Our calculations indicate that, with given initial charge separation, the effects of parton level evolution and hadron level evolution weaken the charge separation indeed, but there are still enough signals that could survive to the final hadron system. Furthermore, we found that, the contribution of background to Δ γ is negligible in small collision systems. So, we propose the small collision system is a good place to check the contribution of the CME.

Source: Physical Review C

DOI: 10.1103/pr3l-5v4m

Authors: Yi Xu, Chen Gao, Shi-Xue Zhang, Wei-Tian Deng

Institution: Huazhong University of Science and Technology

Language: English

Topic: High-Energy Particle Collisions Research

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: National Natural Science Foundation of China, Huazhong University of Science and Technology

Award: G2749016283