Remarks concerning bulk viscosity of hadron matter in relaxation time ansatz

TL;DR

This paper calculates the bulk viscosity of hadron matter in heavy-ion collisions using relaxation time approximation within a relativistic mean-field model, analyzing the impact of different approximations and confirming consistent results across models.

Contribution

It provides a comparative analysis of bulk viscosity calculations using various approximations within a relativistic mean-field framework for hadron matter.

Findings

Numerical results show minimal deviation among different models.

Approximations used in literature have limited impact on bulk viscosity estimates.

Results support earlier findings of bulk viscosity behavior in hadron matter.

Abstract

The bulk viscosity is calculated for hadron matter produced in heavy-ion collisions, being described in the relaxation time approximation withi n the relativistic mean- field-based model with scaled hadron masses and couplings. W e show how different approximations used in the literature affect the result. Nume rical evaluations of the bulk viscosity with three considered models deviate not much from each other confirming earlier results.