# Chemical non-equilibrium and viscosity at the early stages of heavy ion collisions

ECT* seminar
Speaker:
Sreekanth Villuvattath (Center for High Energy Physics, Indian Institute of Science, Bangalore, India)
Date:
28 Sep 2016 - 11:15
Location:
Villa Tambosi 2nd Floor, Seminar Room
Abstract:

In this talk I would like to discuss the implications of possible high values of shear viscosity of chemically non-equilibrated quark-gluon plasma (QGP) formed in the relativistic heavy-ion collisions at high energies. I analyse some temperature dependent $\eta/s$ values used in literature, using relativistic second-order dissipative hydrodynamics to discuss the chemical equilibration, as well as its effect on formation of negative pressure areas while expansion, known as cavitations. I also propose a possible way of bounding the QGP shear viscosity values at high energies using  using cavitations.