Speaker
Dr
Anton Wiranata
(Central China Normal University/LBL)
Description
The shear viscosity η and entropy density s of a hadron gas with zero baryon
number density are calculated using the Chapman-Enskog and virial expansion approaches,
respectively. Interactions are included via the K-matrix parametrization of cross sections
preserving the unitarity of the S-matrix. In the four component mixture (π − K − N − η),
a total of 57 resonances up to 2 GeV mass are included. Interactions forming resonances reduce
the magnitude of η and increase s, both effects serving to progressively reduce η/s as the
temperature nears the QCD phase transition temperature.
Author
Dr
Anton Wiranata
(Central China Normal University/LBL)
