Status of the experimental search for the CME

by Fuqiang Wang (Purdue University)

Tuesday 20 Jul 2021, 11:00 → 12:00 US/Eastern

The chiral magnetic effect (CME) has excited immense interest because of its fundamental physics in topological QCD and possible connection to the matter-antimatter asymmetry of the universe. Experimental measurements of CME-sensitive charge separation observables are overwhelmed by physics backgrounds. The experimental challenge has become how to control/calibrate the backgrounds in order to extract the possible small CME signal. In this seminar, I will first give a brief introduction of the CME and the background issue in its experimental search with a limited survey of the experimental observables. I will then, focus on the most recent measurement from STAR utilizing the spectator and participant planes in Au+Au collisions (arXiv:2106.09243), especially regarding possible additional backgrounds. Finally I will give an outlook, not just on the isobar which is imminent, but much beyond, with future data taking of Au+Au collisions at RHIC.

BNL_seminar.pdf

fuqiang.m4v