Anomalous enhancement of dilepton production as a precursor of color superconductivity

TL;DR

This paper predicts a significant increase in dilepton production near the critical temperature of color superconductivity due to diquark fluctuations, which could be observed in heavy-ion collision experiments.

Contribution

It introduces a detailed calculation of photon self-energy modifications caused by diquark fluctuations near the color superconductivity transition.

Findings

Enhanced dilepton production at low invariant mass in the normal phase.

Diquark fluctuations significantly influence electromagnetic signals in dense quark matter.

Potential experimental signatures in relativistic heavy-ion collisions.

Abstract

We compute the modification of the photon self-energy due to dynamical diquark fluctuations developed near the critical temperature of the color superconductivity through the Aslamasov-Larkin, Maki-Thompson and density of states terms, which are responsible for the paraconductivity in metals at vanishing energy and momentum. It is shown that the rate has a significant enhancement at low invariant-mass region over a rather wide range of temperature in the normal phase. This enhancement is worth exploration in the relativistic heavy-ion collisions, which may thereby reveal the significance of the diquark fluctuations in dense quark matter.