Charge-dependent transverse momentum and its impact on the search for the chiral magnetic wave

Abstract

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 $A_{\mathrm{ch}}-p_{\mathrm{T}}$ correlation and its connection with the local charge conservation (LCC). The impact of $A_{\mathrm{ch}}-p_{\mathrm{T}}$ 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.

arXiv comment6 pages, 6 figures

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