Search for the chiral magnetic effect in heavy ion collisions  

作　　者：Fu-Qiang Wang Jie Zhao 

机构地区：[1]School of Science, Huzhou University [2]Department of Physics and Astronomy, Purdue University

出　　处：《Nuclear Science and Techniques》2018年第12期71-80,共10页核技术（英文）

基　　金：supported in part by the National Natural Science Foundation of China(No.11747312);the U.S.Department of Energy(No.de-sc0012910)

摘　　要：Quark interactions with topological gluon fields in quantum chromodynamics can yield local P and CP violations that could explain the matter–antimatter asymmetry in our universe. Effects of P and CP violations can lead to charge separation under a strong magnetic field, a phenomenon called the chiral magnetic effect(CME).Early measurements of the CME-induced charge separation in heavy ion collisions are dominated by physics backgrounds. This report discusses the recent innovative efforts in eliminating those backgrounds, namely by eventshape engineering, invariant mass dependence, and reaction and participant plane comparison. The backgroundfree CME measurements using these novel methods are presented.Quark interactions with topological gluon fields in quantum chromodynamics can yield local P and CP violations that could explain the matter-antimatter asymmetry in our universe. Effects of P and CP violations can lead to charge separation under a strong magnetic field, a phenomenon called the chiral magnetic effect （CME）. Early measurements of the CME-induced charge separation in heavy ion collisions are dominated by physics backgrounds. This report discusses the recent innovative efforts in eliminating those backgrounds, namely by eventshape engineering, invariant mass dependence, and reaction and participant plane comparison. The backgroundfree CME measurements using these novel methods are presented.

关 键 词：重离子碰撞 磁性 不对称现象 相互作用能 物理背景 CME 反物质 CP 

分 类 号：O571.6[理学—粒子物理与原子核物理] O484.43[理学—物理]