Investigation of Experimental Observables in Search of the Chiral Magnetic Effect in Heavy-ion Collisions in the STAR experiment

Utilization of Event Shape in Search of the Chiral Magnetic Effect in Heavy-ion Collisions

“…As pointed out in Ref. [19], with Ψ RP known in the model, we can directly calculate a 1,± , and utilize the following relation to estimate the CME contribution in ∆γ 112 {RP}:…”

“…Therefore, several observables in search of the CME have been designed to measure a 1,± fluctuations across the RP, such as the γ correlators [14], the R correlators [15,16], and the signed balance functions [17,18]. It has been demonstrated that all these methods carry essentially the same physical message with similar sensitivities to the CME signal and backgrounds [19]. In this paper we focus on the γ 112 correlator [14],…”

“…The two isobaric systems have the same number of nucleons and hence similar amounts of elliptic flow, but different numbers of protons, roughly leading to a 15% difference in the magnetic field squared and in turn, a similar magnitude difference in the CME signal [32][33][34]. The sensitivities of several observables to the CME in these isobar collisions have been investigated using the EBE-AVFD simulations [19], and we will examine whether the ESE approach has any advantage over the ensemble average in ∆γ 112 . In Sec.…”