J/Psi dissociation in parity-odd bubbles

TL;DR

This paper investigates how parity-odd domains in heavy-ion collisions affect quarkonium dissociation via electric fields generated by magnetic fields, revealing anisotropic survival probabilities that can probe electromagnetic properties.

Contribution

It introduces a model for quarkonium dissociation in parity-odd bubbles considering electromagnetic fields and analyzes the anisotropic distribution of surviving quarkonia.

Findings

Dissociation rate depends on quarkonium velocity and electric field strength.

The azimuthal distribution of surviving quarkonia is strongly anisotropic.

The anisotropy pattern can be used to probe electromagnetic fields in collisions.

Abstract

We calculate the quarkonium dissociation rate in the P and CP-odd domains (bubbles) that were possibly created in heavy-ion collisions. In the presence of the magnetic field produced by the valence quarks of colliding ions, parity-odd domains generate electric field. Quarkonium dissociation is the result of quantum tunneling of quark or antiquark through the potential barrier in this electric field. The strength of the electric field in the quarkonium comoving frame depends on the quarkonium velocity with respect to the background magnetic field. We investigate momentum, electric field strength and azimuthal dependence of the dissociation rate. Azimuthal distribution of quarkonia surviving in the electromagnetic field is strongly anisotropic; the form of anisotropy depends on the relation between the electric and magnetic fields and quarkonium momentum. These features can be used to explore the properties of the electromagnetic field created in heavy ion collisions.