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 ${A}_{\mathrm{ch}}\text{\ensuremath{-}}{p}_{\mathrm{T}}$ correlation and its connection with the local charge conservation (LCC). The impact of ${A}_{\mathrm{ch}}\text{\ensuremath{-}}{p}_{\mathrm{T}}$ 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.