Viscous coefficients and thermal conductivity of a π K N gas mixture in the medium
Abstract
The temperature and density dependence of the relaxation times, thermal conductivity, shear viscosity and bulk viscosity for a hot and dense gas consisting of pions, kaons and nucleons have been evaluated in the kinetic theory approach. The in-medium cross-sections for π π , π K and π N scatterings were obtained by using complete propagators for the exchanged ρ , σ , K∗ and Δ excitations derived using thermal field theoretic techniques. Notable deviations can be observed in the temperature dependence of η , ζ and λ when compared with corresponding calculations using vacuum cross-sections usually employed in the literature. The value of the specific shear viscosity η /s is found to be in agreement with available estimates.
- Publication:
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European Physical Journal A
- Pub Date:
- March 2020
- DOI:
- 10.1140/epja/s10050-020-00074-3
- arXiv:
- arXiv:1908.02933
- Bibcode:
- 2020EPJA...56...79K
- Keywords:
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- Nuclear Theory;
- High Energy Physics - Phenomenology
- E-Print:
- Version published in European Physical Journal A