Speaker
Armando Puglisi
Description
The study of transport coefficients of strongly interacting matter has
generated a great interest in the research for Quark-Gluon Plasma (QGP) in
Heavy Ion Collisions at relativistic energy.
In this work we compute shear viscosity and electric conductivity of QGP
exploring a quasiparticle model settled to correctly account for the
thermodynamics of Lattice QCD.
We compare Relaxation Time Approximation analytic formulas with results
obtained solving numerically Relativistic Boltzmann Equation.
Quasiparticle model predicts $4\pi\, \eta/s \sim 5$ at the critical
temperature $T_c$. However, rescaling the cross-section in order to
reproduce the minimum value of $\eta/s=0.08$, it is possible to describe
simultaneously recent Lattice results on electric conductivity.
Another interesting quantity is the shear viscosity to electric
conductivity ratio which could give us information about the quark to
gluon scattering rates or relaxation times $\tau_g / \tau_q$.
Author
Armando Puglisi
Co-authors
Salvatore Plumari
(University of Catania (Italy))
Vincenzo Greco
(University of Catania)
