Transport properties of hadronic matter in magnetic field

TL;DR

This paper investigates how magnetic fields influence the shear and bulk viscosities of hot, dense hadronic matter using the hadron resonance gas model, revealing magnetic field effects on transport coefficients.

Contribution

It provides a novel analysis of magnetic field effects on shear and bulk viscosities in hadronic matter using theoretical models and low energy theorems.

Findings

Vacuum contribution dominates bulk viscosity at finite magnetic field.

Bulk viscosity increases with magnetic field up to 0.1 GeV temperature.

Shear viscosity decreases as magnetic field strength increases.

Abstract

We study the effect of magnetic field on the transport properties like shear and bulk viscosities of hot and dense hadronic matter within hadron resonance gas model. We estimate the bulk viscosity using low energy theorems for bilocal correlators of the energy momentum tensor generalized to finite temperature, density and magnetic field. We use Gaussian ansatz for the spectral function at low frequency. We estimate shear viscosity coefficient using molecular kinetic theory. We find that vacuum contribution due to finite magnetic field dominates the bulk viscosity ({\zeta}) for the temperatures up to 0.1GeV and increases with magnetic field while ratio {\zeta}/s decreases with magnetic field. We also find that shear viscosity coefficient of hadronic matter decreases with magnetic field.