Publication: Eta/s is critical (at phase transitions)
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2009
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Amer Inst Physics
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Abstract
The viscosity over entropy density ratio, or KSS number, can help isolate the critical point in the hadron phase-diagram in Relativistic Heavy Ion Collisions. We argue that this quantity does have a minimum at a phase transition or crossover. Although indications from conventional non-relativistic gases point out to even a divergence in eta/s when the phase-transition is first-order, since the critical exponent is rather low, this will be more difficult to ascertain in RHIC or FAIR. The experimental data are more likely to reveal a discontinuity for a first order phase transition or a smooth minimum at a crossover.
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© 2009 American Institute of Physics.
We thank the organizers of the XIII Mexican School of Particles and Fields for this very successful meeting.
Mexican Workshop on Particles and Fields (13. 2008. Hermosillo, Méjico).
We thank the organizers of the XIII Mexican School of Particles and Fields for this very
successful meeting. Work supported by grants BSCH-PR34/07-15875, FPA 2004 02602,FPA 2005-02327, and Accion Integrada Hispano-Portuguesa HP2006-0018.
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