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- W3100331304 abstract "In this work the shear viscosity of strongly interacting matter is calculated within a two-flavor Nambu--Jona-Lasinio model as a function of temperature and chemical potential. The general Kubo formula is applied, incorporating the full Dirac structure of the thermal quark spectral function and avoiding commonly used on-shell approximations. Mesonic fluctuations contributing via Fock diagrams provide the dominant dissipative processes. The resulting ratio $eta/s$ (shear viscosity over entropy density) decreases with temperature and chemical potential. Interpolating between our NJL results at low temperatures and hard-thermal-loop results at high temperatures a minimum slightly above the AdS/CFT benchmark $eta/s=1/4pi$ is obtained." @default.
- W3100331304 created "2020-11-23" @default.
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- W3100331304 date "2015-10-01" @default.
- W3100331304 modified "2023-10-06" @default.
- W3100331304 title "Shear viscosities from Kubo formalism in a large-Nc Nambu-Jona-Lasinio model" @default.
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- W3100331304 doi "https://doi.org/10.1140/epja/i2015-15127-7" @default.
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