Charge-dependent correlations from event-by-event anomalous hydrodynamics

TL;DR

This paper models the Chiral Magnetic Effect in heavy-ion collisions using 3+1D anomalous hydrodynamics with event-by-event simulations, capturing initial axial charge fluctuations and analyzing their impact on charge-dependent correlations.

Contribution

It introduces a comprehensive 3+1D anomalous hydrodynamic framework with a novel initial axial charge model for simulating CME in heavy-ion collisions.

Findings

Event-by-event simulations reproduce experimental correlation functions.

Anomalous transport significantly influences charge-dependent correlations.

Initial axial charge fluctuations are crucial for CME observables.

Abstract

We report on our recent attempt of quantitative modeling of the Chiral Magnetic Effect (CME) in heavy-ion collisions. We perform 3+1 dimensional anomalous hydrodynamic simulations on an event-by-event basis, with constitutive equations that contain the anomaly-induced effects. We also develop a model of the initial condition for the axial charge density that captures the statistical nature of random chirality imbalances created by the color flux tubes. Basing on the event-by-event hydrodynamic simulations for hundreds of thousands of collisions, we calculate the correlation functions that are measured in experiments, and discuss how the anomalous transport affects these observables.