Charge asymmetry dependency of π/K anisotropic flow in U+U = 193 GeV and Au+Au = 200 GeV collisions at STAR

Qi-Ye Shou
2014 Journal of Physics, Conference Series  
In this paper we present STAR's measurements of v2 and v3 for charged kaons and pions at low transverse momentum range (0.15 < pT < 0.5 GeV/c), as a function of event charge asymmetry (A ch ) in both U+U collisions at √ sNN = 193 GeV and Au+Au collisions at √ sNN = 200 GeV. We found that in 20% − 60% centrality, the ratio of slope parameters of ∆v3(A ch ) to that of ∆v2(A ch ), is +3σ below the predicted value (1/3) from local charge conservation at freeze-out, indicating that it is unlikely
more » ... t it is unlikely that such effect can have a significant contribution to the splitting of elliptic flow of charged pions as a function of A ch . We also observed a smaller ∆v2(A ch ) slope for kaons relative to pions. Our measurements serve as important consistency checks for the phenomena suggested as the consequence of the chiral magnetic wave.
doi:10.1088/1742-6596/509/1/012033 fatcat:ieoar3uoczhlpovujp2sedvuoi