Hydrodynamics and the Detection of the QCD Axial Anomaly in Heavy Ion Collisions

TL;DR

This paper explores how the QCD axial anomaly influences hydrodynamic behavior in high-density quark-gluon plasma, proposing a detectable signal of increased spin-excited hadrons aligned with the collision axis.

Contribution

It introduces a novel hydrodynamic framework incorporating the axial anomaly and predicts an experimental signature in heavy ion collisions.

Findings

Enhanced production of spin-excited hadrons along the rotation axis

Potential experimental observable of the axial anomaly in heavy ion collisions

Hydrodynamic modeling of anomaly effects in QCD matter

Abstract

We consider the experimental implications of the axial current triangle diagram anomaly in a hydrodynamic description of high density QCD. We propose a signal of an enhanced production of spin-excited hadrons in the direction of the rotation axis in off-central heavy ion collisions.