Centrality dependence and isospin effect on \Wpm and \Zn productions in nucleus-nucleus collisions at \sNN=5.02~TeV

2022/01/24 by Zhou, Dai-Mei, Yan, Yu-Liang, Zheng, Liang +8
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2201.09525

Abstract

In this paper, the centrality dependent \Zn and \Wpm production and the isospin effect in \Wpm production are investigated with a parton and hadron cascade model PACIAE in Pb--Pb collisions at \sNN=5.02~TeV. ALICE data of \Zn production in Pb--Pb collisions at \sNN=5.02~TeV are found to be reproduced fairly well. The prediction on \Wpm production in the same collision system is given as well. An interesting isospin effect is observed in exploring the charge asymmetry between \Wp and \Wm as a function of the asymmetry between number of valence u- and d-quarks varied from small to large collision systems at center-of-mass energy 5.02 TeV. The results serve as a important benchmarks for understanding the initial conditions of heavy-ion collisions.

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