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

Abstract

In this paper, the centrality dependent $\text{Zn}$ and $\text{Wpm}$ production and the isospin effect in $\text{Wpm}$ production are investigated with a parton and hadron cascade model PACIAE in Pb--Pb collisions at $\text{sNN}=5.02$~TeV. ALICE data of $\text{Zn}$ production in Pb--Pb collisions at $\text{sNN}=5.02$~TeV are found to be reproduced fairly well. The prediction on $\text{Wpm}$ production in the same collision system is given as well. An interesting isospin effect is observed in exploring the charge asymmetry between $\text{Wp}$ and $\text{Wm}$ 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.

Comments: arXiv admin note: text overlap with arXiv:2002.00344