How do diquark fluctuations and chiral soft modes affect di-lepton production in the deconfined phase?

TL;DR

This paper investigates how diquark fluctuations and chiral soft modes influence di-lepton production in the deconfined phase, revealing that spectral peaks occur but may not serve as clear phase transition signals.

Contribution

It provides a detailed analysis of the spectral function contributions from soft modes near phase transitions at finite temperature and density.

Findings

Spectral function peaks are observed due to soft modes.

Enhanced di-lepton production rates are not prominent enough as phase transition signals.

Soft modes influence di-lepton spectra but are not definitive indicators of phase changes.

Abstract

We examine diquark fluctuations and chiral soft modes existing in the precritical region of color superconductivity and chiral transition, respectively, at finite temperature and density. We evaluate how they contribute to anomalous di-lepton production; although there appear peaks in the spectral function owing to the existence of the soft modes, the enhancement of the production rate may not be so prominent to be a clear signal of the phsase transitions.