1202.5155 (Vinod Chandra)

Transport properties of anisotropically expanding quark-gluon plasma
within a quasi-particle model    [PDF]

Vinod Chandra

The bulk and shear viscosities ($\eta$ and $\zeta$) have been studied for
quark-gluon-plasma produced in relativistic heavy ion collisions within
semi-classical transport theory in a recently proposed quasi-particle model of
(2+1)-flavor lattice QCD equation of state. These transport parameters have
been found to be highly sensitive to the interactions present in hot QCD.
Contributions to the transport coefficients from both the gluonic sector and
the matter sector have been investigated. The matter sector is found to be
significantly dominating over the gluonic sector, in the case of both $\eta$
and $\zeta$. The temperature dependences of the quantities, $\zeta/{\mathcal
S}$, and $\zeta/\eta$ indicate a sharply rising trend for the $\zeta$ closer to
QCD transition temperature. Both $\eta$ and $\zeta$ are shown to be equally
significant for the temperatures that are accessible in the relativistic heavy
ion collision experiments, and hence play crucial role while investigating the
properties of the quark-gluon plasma.

View original: http://arxiv.org/abs/1202.5155