Speaker
Description
Charge separation along the magnetic field as expected from the chiral magnetic effect (CME) has been studied in Au+Au collisions at $\sqrt{s_{\text{NN}}} = 200$ GeV at the Relativistic Heavy Ion Collider.
It is quantified by the charge- and reaction plane (RP)-dependent azimuthal correlator $\Delta\gamma$.
The elliptic-flow-induced background is removed from the measurements by comparing $\Delta\gamma$ measured relative to the event planes reconstructed from the Zero-Degree Calorimeters (ZDC) and from the Time Projection Chamber (TPC) of the STAR experiment. The effects of flow-induced backgrounds, nonflow, and the RP-independent three-particle correlations are taken into account by flow/nonflow decomposition in data, utilizing small-system collision measurements, as well as data-guided model calculations. In this presentation, we report the residual $\Delta\gamma$ signals after the rigorous removal of these background contributions, which may contain a contribution from the CME.
