1 research outputs found
Effects of partial thermalization on HBT interferometry
Hydrodynamical models have generally failed to describe interferometry radii
measured at RHIC. In order to investigate this ``HBT puzzle'', we carry out a
systematic study of HBT radii in ultrarelativistic heavy-ion collisions within
a two-dimensional transport model. We compute the transverse radii and
as functions of for various values of the Knudsen number, which
measures the degree of thermalization in the system. For realistic values of
the Knudsen number estimated from data, we obtain ,
much closer to data than standard hydrodynamical results. Femtoscopic
observables vary little with the degree of thermalization. Azimuthal
oscillations of the radii in non central collisions do not provide a good probe
of thermalization.Comment: Proceedings for Quark Matter 2009, Knoxville, TN US