Electric Fields and Chiral Magnetic Effect in Cu + Au Collisions

Wei-Tian Deng; Xu-Guang Huang

doi:10.1016/j.physletb.2015.01.050

paper

Electric Fields and Chiral Magnetic Effect in Cu + Au Collisions

arXiv:1411.2733 · doi:10.1016/j.physletb.2015.01.050

Abstract

The non-central Cu + Au collisions can create strong out-of-plane magnetic fields and in-plane electric fields. By using the HIJING model, we study the general properties of the electromagnetic fields in Cu + Au collisions at 200 GeV and their impacts on the charge-dependent two-particle correlator $γ_{q_{1} q_{2}} =< cos (ϕ_{1} + ϕ_{2} - 2 ψ_{R P}) >$ (see main text for definition) which was used for the detection of the chiral magnetic effect (CME). Compared with Au + Au collisions, we find that the in-plane electric fields in Cu + Au collisions can strongly suppress the two-particle correlator or even reverse its sign if the lifetime of the electric fields is long. Combining with the expectation that if $γ_{q_{1} q_{2}}$ is induced by elliptic-flow driven effects we would not see such strong suppression or reversion, our results suggest to use Cu + Au collisions to test CME and understand the mechanisms that underlie $γ_{q_{1} q_{2}}$ .

arXiv commentV1: 7 pages, 8 figures. V2: Add 2 new figures. Published version

Electric Fields and Chiral Magnetic Effect in Cu + Au Collisions

Abstract

References in corpus (42)

Cited by in corpus (58)