Relaxation time of non-conformal plasma

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Abstract

We study effective relaxation time of viscous hydrodynamics of strongly coupled non-conformal gauge theory plasma using gauge theory/string theory correspondence. We compute leading corrections to the conformal plasma relaxation time from the relevant deformations due to dim-2 and dim-3 operators. We discuss in details the relaxation time τeff of N = 2* plasma. For a certain choice of masses this theory undergoes a phase transition with divergent specific heat cV ∼ | 1 - Tc / T |- 1 / 2. Although the bulk viscosity remains finite all the way to the critical temperature, we find that τeff diverges near the critical point as τeff ∼ | 1 - Tc / T |- 1 / 2. © 2009 Elsevier B.V. All rights reserved.

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Buchel, A. (2009). Relaxation time of non-conformal plasma. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 681(2), 200–203. https://doi.org/10.1016/j.physletb.2009.10.007

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