Shear viscosity from Kubo formalism: NJL model study

Regular Article - Theoretical Physics

Abstract

A large-N c expansion is combined with the Kubo formalism to study the shear viscosity η of strongly interacting matter in the two-flavor NJL model. We discuss analytical and numerical approaches to η and investigate systematically its strong dependence on the spectral width and the momentum-space cutoff. Thermal effects on the constituent quark mass from spontaneous chiral symmetry breaking are included. The ratio η/s and its thermal dependence are derived for different parameterizations of the spectral width and for an explicit one-loop calculation including mesonic modes within the NJL model.

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Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Physik DepartmentTechnische Universität MünchenGarchingGermany
  2. 2.Theoretical Research Division, Nishina CenterRIKENWakoJapan
  3. 3.ECT*, Villa TambosiVillazzano (TN)Italy

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