Holographic vector mesons in a hot and dense medium

TL;DR

This paper uses a holographic model to study how vector mesons behave in hot and dense environments, revealing their spectral broadening, mass decrease, and dissociation at high temperature and density.

Contribution

It applies the soft wall holographic model to analyze vector meson spectral functions under finite temperature and density, providing new insights into their dissociation and mass shifts.

Findings

Vector mesons become broader and their mass decreases with increasing temperature and density.

Dissociation occurs when spectral peaks disappear at high temperature and density.

Spectral functions show narrow resonances at low parameters, broadening as conditions intensify.

Abstract

We investigate vector meson spectral functions at finite temperature and density through the soft wall model, a bottom-up holographic approach to QCD. We find narrow resonances at small values of the parameters, becoming broader as temperature and density increase. We study dissociation of such states, occurring when no peak can be distinguished in the spectral function. We also find a decreasing of the mass of vector mesons at increasing temperature and density. Finally, a discussion of these results is presented.