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dc.contributor.authorMishra, Amruta
dc.contributor.authorPanda, P. K. [UNESP]
dc.contributor.authorGreiner, W.
dc.identifier.citationJournal of Physics G: Nuclear and Particle Physics, v. 27, n. 7, p. 1561-1575, 2001.
dc.description.abstractWe derive the equation of state for hot nuclear matter using the Walecka model in a non-perturbative formalism. We include here the vacuum polarization effects arising from the nucleon and scalar mesons through a realignment of the vacuum. A ground state structure with baryon-antibaryon condensates yields the results obtained through the relativistic Hartree approximation of summing baryonic tadpole diagrams. Generalization of such a state to include the quantum effects for the scalar meson fields through the σ -meson condensates amounts to summing over a class of multiloop diagrams. The techniques of the thermofield dynamics method are used for the finite-temperature and finite-density calculations. The in-medium nucleon and sigma meson masses are also calculated in a self-consistent manner. We examine the liquid-gas phase transition at low temperatures (≈ 20 MeV), as well as apply the formalism to high temperatures to examine a possible chiral symmetry restoration phase transition.en
dc.relation.ispartofJournal of Physics G: Nuclear and Particle Physics
dc.titleQuantum vacuum in hot nuclear matter: A non-perturbative treatmenten
dc.contributor.institutionInstitute for Plasma Research
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionJ W Goethe Universität
dc.description.affiliationInstitute for Plasma Research, Gandhinagar 382428
dc.description.affiliationInst. de Fisica Teorica Universidade Estadual Paulista, Rua Pamplona 145, 01405-900 São Paulo, SP
dc.description.affiliationInst. für Theoretische Physik J W Goethe Universität, Robert Mayer-Straße 10, D-60054 Frankfurt/Main
dc.description.affiliationUnespInst. de Fisica Teorica Universidade Estadual Paulista, Rua Pamplona 145, 01405-900 São Paulo, SP
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unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Física Teórica (IFT), São Paulopt
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