Cavitation and thermal dilepton production in QGP

TL;DR

This paper investigates how non-ideal effects like viscosity, equation of state deviations, and cavitation influence thermal dilepton production in quark-gluon plasma, highlighting the importance of including these factors for accurate spectra estimation.

Contribution

It provides the first-order correction calculations for dilepton rates considering shear and bulk viscosities and emphasizes the impact of cavitation on dilepton spectra estimation.

Findings

Shear viscosity enhances dilepton spectra.

Bulk viscosity suppresses dilepton spectra.

Ignoring cavitation leads to inaccurate spectra estimation.

Abstract

We study the \textit{non-ideal} effects arising due to viscosity (both bulk and shear), equation of state ($\epsilon\neq 3P$) and cavitation on thermal dilepton production from QGP at RHIC energies. We calculate the first order corrections to the dilepton production rates due to shear and bulk viscosities. Ignoring the cavitation can lead to a wrong estimation of dilepton spectra. We show that the shear viscosity can enhance the thermal dilepton spectra whereas the bulk viscosity can suppress it. We present the combined effect of bulk and shear viscosities on the dilepton spectra.