Shear viscosity to entropy density
ratio of nuclear
matter by transport model, D. Fang, Shanghai
Institute of
Applied Physics, Chinese Academy of Sciences, China − The
ratio of shear
viscosity to entropy density for an equilibrated nuclear system is
investigated
at intermediate energy heavy-ion collisions within the framework
of the
Boltzmann-Uehling-Uhlenbeck model. After
the
collision system almost reaching a local equilibration, the
temperature,
pressure and energy density are obtained from the phase-space
information and
shear viscosity to entropy density ratio is calculated using the
Green-Kubo
method. The results
show that shear
viscosity to entropy density ratio decreases with incident energy
and tends
toward a smaller value around 0.5, which is close to the BNL
Relativistic Heavy
Ion Collider results.