The chiral magnetic wave (CMW) is sought using the charge asymmetry ($A_{\mathrm{ch}}$) dependence of anisotropic flow in heavy-ion collisions. The charge-dependent transverse momentum ($p_{\mathrm{T}}$), however, could play a role as a background. With the string fragmentation models, including pythia, we demonstrate the origin of the $A_{\mathrm{ch}}\text{−}{p}_{\mathrm{T}}$ correlation and its connection with the local charge conservation (LCC). The impact of $A_{\mathrm{ch}}\text{−}{p}_{\mathrm{T}}$ and its behavior in varied kinematic windows are also discussed. This study provides more insights for the search for the CMW and comprehending the collective motion of the quark-gluon plasma.

• Received 19 October 2020
• Accepted 2 March 2021

DOI:https://doi.org/10.1103/PhysRevC.103.034906