Speaker
Dr
Anton Wiranata
(CCNU)
Description
The ratio η/s of the shear viscosity, η, and the entropy density, s, of hot interacting hadrons is
calculated using the Chapman-Enskog and virial expansion methods. Interactions are parametrized
using the K-matrix which preserves the unitarity of the S-matrix. In the four component mixture
π-K-η-N , 57 resonances up to 2 GeV are included. Increasing number of resonances is shown to
reduce η and increase s resulting in a progressive decrease of η/s for temperatures close to the QCD
phase transition temperature. Prospects of hot hadrons becoming a “perfect” fluid are discussed.
Primary author
Dr
Anton Wiranata
(CCNU)
Co-authors
Madappa Prakash
(Ohio University)
Volker Koch
(LBNL)
Xin-Nian Wang
(Lawrence Berkeley National Lab. (US))