Charge-Dependent Directed Flow in Cu+Au Collisions at sNN =200 GeV

(STAR Collaboration)

研究成果: Article同行評審

14 引文 斯高帕斯(Scopus)

摘要

We present the first measurement of charge-dependent directed flow in Cu+Au collisions at sNN=200 GeV. The results are presented as a function of the particle transverse momentum and pseudorapidity for different centralities. A finite difference between the directed flow of positive and negative charged particles is observed that qualitatively agrees with the expectations from the effects of the initial strong electric field between two colliding ions with different nuclear charges. The measured difference in directed flow is much smaller than that obtained from the parton-hadron-string-dynamics model, which suggests that most of the electric charges, i.e., quarks and antiquarks, have not yet been created during the lifetime of the strong electric field, which is of the order of, or less than, 1 fm/c.

原文English
文章編號012301
期刊Physical review letters
118
發行號1
DOIs
出版狀態Published - 2017 一月 5

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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