2017/09/09 by Sabyasachi Ghosh, Ghosh, Sabyasachi, G. Krein +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.1709.02902
openalex publication_date 2017/09/09 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28
We have calculated the shear viscosity of pion medium, where propagating pion has some finite thermal width due to interaction with the low mass resonances, σ and ρ. With the help of standard thermal field theoretical technique, the thermal width of the pion has been calculated from the pion self-energy diagram for πσ and πρ loops, where an effective Lagrangian density has been used for interaction part. We have found a very small value of shear viscosity by entropy density ratio (η/s), which is very close to the KSS bound.