Shear-induced anomalous transport and charge asymmetry of triangular flow in heavy-ion collisions

TL;DR

This paper investigates how shear, vorticity, and magnetic fields induce anomalous charge-dependent flow patterns in heavy-ion collisions, proposing a measurable signature of quantum transport phenomena related to the chiral anomaly.

Contribution

It introduces shear-induced chiral magnetic and vortical effects as new quantum transport phenomena and proposes charge asymmetry of triangular flow as an experimental signature.

Findings

Charge correlations induced by shear effects are predicted.

Signal-to-background ratio suggests feasible experimental detection.

Hydrodynamical simulations support the proposed observable.

Abstract

Chiral anomaly implies the existence of non-dissipative transport phenomena, such as the chiral magnetic effect. At second order in the derivative expansion, novel quantum transport phenomena emerge. In this paper, we focus on the anomalous transport driven by a combination of shear, vorticity and magnetic field. We find that the corresponding transport phenomena -- shear-induced chiral magnetic and chiral vortical effects (siCME and siCVE) -- induce characteristic charge correlations among the hadrons produced in heavy ion collisions. We propose the charge asymmetry of triangular flow as a signature of the anomalous transport, and estimate the strength of the signal, as well as the background, using hydrodynamical model simulations. We find that the signal-to-background ratio for the proposed observable is favorable for experimental detection.