Speaker
Dr
Nasser Demir
(Kuwait University)
Description
We present a detailed comparison between two different methods to calculate
the shear viscosity coefficient for a set of four hadronic systems. One calculation
employs the Chapman-Enskog method to calculate the shear viscosity coefficient
for a hot hadronic system. The other calculation uses the Green-Kubo method
to calculate the shear viscosity for a hadronic medium simulated using
the Ultrarelativistic Quantum Molecular Dynamics (UrQMD) model. The calculations
are performed over a temperature range of 60-200 MeV, and the differences
in the values for the calculations are highlighted. The degrees of freedom and
cross sections of the systems for the two calculations are synchronized to ensure
the most accurate comparison possible. The systems studied include those of
massive and massless pions with a fixed cross section, that of chiral pions with
energy dependent cross section, and that of a gas of pions and rho resonanaces.
The lifetime of the rho resonance is varied and the effect of the rho resonance
lifetime on the shear viscosity is investigated.
Primary author
Dr
Anton Wiranata
(Lawrence Berkeley National Laboratory)
Co-authors
Prof.
Madappa Prakash
(Ohio University)
Dr
Nasser Demir
(Kuwait University)
Prof.
Steffen A. Bass
(Duke University)
