The paper expresses the bulk and shear viscosities of cold dense nucleon matter through derivatives of the thermodynamic potential, and claims that the positivity of bulk viscosity imposes an independent stability condition on scalar-vector mean-field models.
The CJT calculation in studying nuclear matter beyond mean field approximation
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abstract
We have introduced a CJT calculation in studying nuclear matter beyond mean field approximation. Based on the CJT formalism and using Walecka model, we have derived a set of coupled Dyson equations of nucleons and mesons. Neglecting the medium effects of the mesons, the usual MFT results could be reproduced. The beyond MFT calculations have been performed by thermodynamic consistently determining the meson effective masses and solving the coupled gap equations for nucleons and mesons. The numerical results for the nucleon and meson effective masses at finite temperature and chemical potential in nuclear matter are discussed.
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Transport coefficients of dense nucleon matter at low temperature
The paper expresses the bulk and shear viscosities of cold dense nucleon matter through derivatives of the thermodynamic potential, and claims that the positivity of bulk viscosity imposes an independent stability condition on scalar-vector mean-field models.