Shear Viscosities from Kubo Formalism in a Large-Nc Nambu-Jona-Lasinio Model

Auteur: Lang Robert
Taal: Engels
Shear Viscosities from Kubo Formalism
  • Engels
  • Paperback
  • 9783838151304
  • juli 2015
  • 144 pagina's
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Samenvatting

The quark-gluon plasma produced in heavy-ion collisions at RHIC and LHC is a hot and dense state of strongly correlated matter. It behaves like an almost-perfect fluid featuring a small ratio of shear viscosity to entropy density. In this thesis we calculate within a two-flavor Nambu--Jona-Lasinio model the shear viscosity as function of temperature and chemical potential. A new Kubo formula is developed, incorporating the full Dirac structure of the quark spectral function and avoiding commonly used on-shell approximations. Mesonic fluctuations occurring at Fock level provide the dominant dissipative process. The resulting parameter-free ratio is an overall decreasing function of temperature and chemical potential. In combination with hard-thermal-loop results we find this ratio to feature a minimum slightly above the AdS/CFT benchmark.

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Inhoud

Taal
Engels
Bindwijze
Paperback
Verschijningsdatum
juli 2015
Aantal pagina's
144 pagina's
Illustraties
Met illustraties

EAN

EAN
9783838151304

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Subtitel
in a Large-Nc Nambu-Jona-Lasinio Model
Thema Subject Code
PH

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