Relaxation-time approximation with pair production and annihilation processes

Bibliographic description

punktacja MEiN [2020]: 140

title:	Relaxation-time approximation with pair production and annihilation processes
author:	Bhadury Samapan, Florkowski Wojciech , Jaiswal Amaresh, Ryblewski Radoslaw
journal title:	Physical Review. C
volume:	102
issue:	6
date of publication :	2020
article ID:	064910
ISSN:	2469-9985
eISSN:	2469-9993
DOI:	10.1103/PhysRevC.102.064910
language:	English
journal language:	English
abstract in English:	We extend the Boltzmann equation in the relaxation-time approximation to explicitly include transitions between particles forming an interacting mixture. Using the detailed balance condition as well as conditions of energy-momentum and current conservation, we show that only two independent relaxation time scales are allowed in such an interacting system. Dissipative hydrodynamic equations and the form of transport coefficients are subsequently derived for this case. We find that the shear and bulk viscosity coefficients, as well as the baryon charge conductivity, are independent of the transition time scale. However, the bulk viscosity and conductivity coefficients that can be attributed to the individual components of the mixture depend on the transition time.
affiliation:	Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki Teoretycznej
type:	journal article
subtype:	academic paper