Dilepton production from chirally asymmetric matter

TL;DR

This paper investigates how a finite chiral chemical potential influences dilepton production in hot, dense quark matter, revealing new scattering processes and enhanced production rates at lower invariant masses.

Contribution

It introduces the effects of chiral chemical potential on dilepton production and constituent quark mass within a Nambu--Jona-Lasinio model, highlighting new spectral features.

Findings

Enhanced dilepton production at low invariant mass due to new scattering processes.

Chiral chemical potential significantly alters the electromagnetic spectral function.

Continuous dilepton production rate observed at higher temperature and chemical potential.

Abstract

We evaluate the dilepton production rate (DPR) from hot and dense chirally asymmetric quark matter. The presence of a finite chiral chemical potential (CCP) in the electromagnetic spectral function results in the appearance of new cut structures signifying additional scattering processes in the medium which leads to a significant enhancement in the DPR at lower values of invariant mass. The constituent quark mass evaluated using a 3-flavour Nambu--Jona-Lasinio model is also non-trivially affected by the CCP. These are found to result in a continuous dilepton production rate as a function of the invariant mass for higher values of temperature and baryonic chemical potential.