Bulk viscosity-driven freeze-out in heavy ion collisions

Details Bulk viscosity-driven freeze-out in heavy ion collisions Bulk viscosity-driven freeze-out in heavy ion collisions

2009-01-02

arxiv.org/abs/0901.0226v1

Physics

Nuclear Physics

Nuclear Theory

Proceedings, International School of Nuclear Physics 30th Course Heavy-Ion Collisions from the Coulomb Barrier to the Quark-Gl

Scientific paper

We give an review the HBT puzzle, and argue that its resolution requires the introduction of new physics close to the phase transition scale. We argue that a candidate for this new physics is bulk viscosity, recently postulated to peak, and even diverge, close to the phase transition temperature. We show that such a viscosity peak can force the system created in heavy ion collisions to become unstable, and filament into fragments whose size is weakly dependent on the global size of the system, thereby triggering freeze-out.

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