Chiral Magnetic Effect in Isobaric Collisions from Anomalous-Viscous Fluid Dynamics (AVFD)

TL;DR

This paper uses the AVFD simulation to analyze isobaric collisions at RHIC, proposing a method to detect the Chiral Magnetic Effect by comparing RuRu and ZrZr events with specific selection criteria.

Contribution

It introduces a quantitative simulation approach with AVFD and proposes a new observable difference method for detecting CME signals in isobaric collisions.

Findings

Joint multiplicity and elliptic-flow selection enhances CME detection

Absolute difference between RuRu and ZrZr events isolates CME signal

Predictions for correlation observables in isobaric collisions

Abstract

The isobaric collision experiment at RHIC provides the unique opportunity to detect the possible signal of Chiral Magnetic Effect (CME) in heavy ion collisions. The idea is to contrast the correlation observables of the two colliding systems that supposedly have identical flow-driven background contributions while quite different CME signal contributions due to the 10% variation in their nuclear charge and thus magnetic field strength. With the recently developed quantitative simulation tool for computing CME signal, the Anomalous-Viscous Fluid Dynamics (AVFD), we demonstrate that a joint (multiplicity + elliptic-flow) event selection is crucial for this purpose. We further propose to use the absolute difference between RuRu and ZrZr events (after using identical event selection) for detecting CME signal and make predictions for the correlation observables.