Photo-emission rate of sQGP at finite density

TL;DR

This paper uses holographic methods to compute the photo-emission rate of strongly coupled plasma with finite density, revealing how increased density suppresses conductivity and may relate to jet quenching in heavy-ion collisions.

Contribution

It introduces a novel holographic calculation of spectral functions and photoemission rates for sQGP at finite density, including the effects of charge on coupled gravitational and electromagnetic modes.

Findings

Spectral functions are computed for SYM plasma at finite density.

Conductivity decreases with increasing density.

Potential link to jet quenching phenomena in RHIC experiments.

Abstract

We calculate the thermal spectral function of SYM plasma with finite density using holographic technique. We take the RN-AdS black hole as the dual gravity theory. In the presence of charge, vector modes of gravitational and electromagnetic perturbation are coupled with each other. By introducing master variables for these modes, we solve the coupled system and calculate spectral function. We also calculated photoemission rate of SYM plasma from spectral function for light like momentum, AC conductivity and their density dependence. The suppression of the conductivity in high density is noticed, which might be yet another mechanism for the Jet quenching phenomena in RHIC experiment.