Electromagnetic field produced in high-energy small collision systems within charge density models of nucleons

作     者：Zong-Wei Zhang Xian-Zhuo Cen Wei-Tian Deng 张宗炜;岑显焯;邓维天

作者机构：School of PhysicsHuazhong University of Science and TechnologyWuhan 430074China Dalingshan Secondary SchoolDongGuan 523000China 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2022年第46卷第8期

页      面：184-195页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Supported by the NSFC (12075094 11535005) 

主　　题：electromagnetic field high energy small collision system chiral magnetic effect 

摘      要：Recent experiments show that Δy,an observable designed to detect the chiral magnetic effect(CME),in small collision systems(p+A) is similar to that in heavy ion collisions(A+A).This introduces a challenge to the existence of the CME because it is believed that no azimuthal correlation exists between the orientation of the magnetic field(Φ_(B)) and participant plane(Φ_(2)) in small collision *** this work,we introduce three charge density models to describe the inner charge distributions of protons and neutrons and calculate the electric and magnetic fields produced in small p+A collisions at both RHIC and LHC *** results show that the contribution of the single projectile proton is the main contributor to the magnetic field after averaging over all *** azimuthal correlation between Φ_(B) and Φ_(2) is small but not ***,owing to the large fluctuation in field strength,the magnetic-field contribution to Δγ may be large.