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arXiv · 1411.2733

Electric Fields and Chiral Magnetic Effect in Cu + Au Collisions

Wei-Tian Deng·Xu-Guang Huang
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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 $γ_{q_1q_2}=<\cos(ϕ_1+ϕ_2-2ψ_{RP})>$ (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 $γ_{q_1q_2}$ 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 $γ_{q_1q_2}$.

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BibTeXRIS

Wei-Tian Deng, Xu-Guang Huang. 2015-02-16. Electric Fields and Chiral Magnetic Effect in Cu + Au Collisions. https://doi.org/10.1016/j.physletb.2015.01.050

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