Shear viscosity, cavitation and hydrodynamics at LHC

Details Shear viscosity, cavitation and hydrodynamics at LHC Shear viscosity, cavitation and hydrodynamics at LHC

2011-03-22

arxiv.org/abs/1103.4333v2

Phys. Lett. B704, 486-489 (2011)

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 5 figures, to appear in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2011.09.052

We study evolution of quark-gluon matter in the ultrarelativistic heavy-ion collisions within the frame work of relativistic second-order viscous hydrodynamics. In particular, by using the various prescriptions of a temperature-dependent shear viscosity to the entropy ratio, we show that the hydrodynamic description of the relativistic fluid become invalid due to the phenomenon of cavitation. For most of the initial conditions relevant for LHC, the cavitation sets in very early during the evolution of the hydrodynamics in time $\lesssim 2 $fm/c. The cavitation in this case is entirely driven by the large values of shear viscosity. Moreover we also demonstrate that the conformal term used in equations of the relativistic dissipative hydrodynamic can influence the cavitation time.

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