Chiral vortaic effect and neutron asymmetries at NICA

TL;DR

This paper explores the experimental detection of P-odd effects related to medium vorticity, focusing on neutron asymmetries at NICA, and discusses hyperon polarization and momentum correlations as vorticity probes.

Contribution

It generalizes the Chiral Vortical Effect to conserved charges like baryon number and proposes neutron asymmetries at NICA as a test for vorticity-induced P-odd effects.

Findings

Neutron asymmetries can reveal P-odd effects related to vorticity.

Experimental accuracy sufficient within months at NICA.

Hyperon polarization and momentum correlations are effective vorticity probes.

Abstract

We study the possibility of testing experimentally signatures of P-odd effects related with the vorticity of the medium. The Chiral Vortaic Effect is generalized to the case of conserved charges different from the electric one. In the case of baryonic charge and chemical potential such effect should manifest itself in neutron asymmetries at the NICA accelerator complex measured by the MPD detector. The required accuracy may be achieved in a few months of accelerator running. We also discuss polarization of the hyperons and P-odd correlations of particle momenta (handedness) as probes of vorticity.