Anomalous-hydrodynamic analysis of charge-dependent elliptic flow in heavy-ion collisions

Abstract

Anomalous hydrodynamics is a low-energy effective theory that captures effects of quantum anomalies. We develop a numerical code of ideal anomalous hydrodynamics and apply it to dynamics of heavy-ion collisions, where anomalous transports are expected to occur. We discuss implications of the simulations for possible experimental observations of anomalous transport effects. From analyses of the charge-dependent elliptic flow parameters (v2±) as a function of the net charge asymmetry A±, we find that the linear dependence of Δv2±≡v2−−v2+ on the net charge asymmetry A± can come from a mechanism unrelated to anomalous transport effects. Instead, we find that a finite intercept Δv2±(A±=0) can come from anomalous effects. Keywords: Quark–gluon plasma, Relativistic heavy-ion collisions, Hydrodynamic models, Chiral magnetic effect, Quantum anomaly, Collective flow