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arXiv · 2210.02422

Linear scaling of lepton charge asymmetry in $W^\pm$ production in ultra-relativistic nuclear collisions

An-Ke Lei·Dai-Mei Zhou·Yu-Liang Yan·Xiao-Ming Zhang·Liang Zheng·Du-Juan Wang·Xiao-Mei Li·Gang Chen·Xu Cai·Ben-Hao Sa
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Abstract

The lepton charge asymmetry in $W^\pm$ production in the nuclear collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV is investigated with a parton and hadron cascade model PACIAE. Recently published ALICE and the ATLAS data of lepton charge asymmetry are well reproduced. An interesting linear scaling behavior is observed in the lepton charge asymmetry as a function of the collision system valence quark number asymmetry among the different size of nuclear collision systems at $\sqrt{s_{\rm NN}}=5.02$ TeV. This linear scaling behavior may serve as an additional constraint on the PDF (nPDF) extractions.

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An-Ke Lei, Dai-Mei Zhou, Yu-Liang Yan, Xiao-Ming Zhang, Liang Zheng, Du-Juan Wang, Xiao-Mei Li, Gang Chen, Xu Cai, Ben-Hao Sa. 2022-10-05. Linear scaling of lepton charge asymmetry in $W^\pm$ production in ultra-relativistic nuclear collisions. https://doi.org/10.1142/s0217732323500517

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