1.The figure above is the comparison of the R() correlator for different centralities (40% - 50%, 50% - 60%, 60% - 70%). The concave shapes of the results at all the centralities indicate the presence of CME-driven charge separations. The opening of the concave shape for 60% - 70% centrality is narrower than the others (magnitude of a1 is the largest among these); this indicates the CME-driven charge separation signal is the strongest. The decreasing width of the opening with increasing centrality is an expected result since in the Au+Au collision; a higher centrality means that the spectator particles are larger (? More of the spectators will remain intact). As a result, the magnetic field generated by the moving charged spectator particles will be greater thus leads to a greater CME-driven charge separation signal. However, the higher centrality usually results in a more significant elliptical flow (v2 will be larger). The increase of flow will be likely to result in more background produced in the collision. Therefore, in order to test the insensitivity of the correlator toward the flow-driven charge separation, we applied shape engineering in our calculation.
2. The figure above is the comparison of the R() correlators for the different magnitude of q2 (0% - 20%, 20% - 40%, 40% - 60%). The concave shape of the results at all the q2 values indicates the presence of CME-driven charge separations. However, there is little, if any, the difference in the widths of the opening of the concave shapes for all q2 values. The value of...
