Speaker
Description
The Anomalous Viscous Fluid Dynamics model, AVFD, is used in concert with the charge-sensitive correlator $R_{\Psi_2}(\Delta S)$ to study the scaling properties of background- and chiral-magnetically-driven (CME) charge separation ($\Delta S$), characterized by the inverse variance $\mathrm{\sigma^{-2}_{R_{\Psi_2}}}$ of the $R_{\Psi_{2}}(\Delta S)$ distribution, in Au+Au, Ru+Ru, and Zr+Zr collisions at $\sqrt s_{\mathrm{NN}}=200$~GeV. The $\mathrm{\sigma^{-2}_{R_{\Psi_2}}}$ values for the background are event-shape-independent but show a characteristic scaling pattern with the charged-particle multiplicity, indicating an essential constraint for discerning background from the signal and a robust estimate of the difference between the backgrounds in Ru+Ru and Zr+Zr collisions. By contrast, the $\mathrm{\sigma^{-2}_{R_{\Psi_2}}}$ values for signal + background show scaling violations that characterize the CME-driven contributions. I will discuss these scaling patterns and their implication for the detection and characterization of the CME. Corrections to recent ${R_{\Psi_2}(\Delta S)}$ measurements that account for the background difference in Ru+Ru and Zr+Zr collisions will also be presented and discussed.
| Present via | Offline |
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