Structure of the vacuum in nuclear matter: a nonperturbative approach

We compute the vacuum polarization correction to the binding energy of nuclear matter in the Walecka model using a nonperturbative approach. We first study such a contribution as arising from a ground-state structure wit
We compute the vacuum polarization correction to the binding energy of nuclear matter in the Walecka model using a nonperturbative approach. We first study such a contribution as arising from a ground-state structure with baryon-antibaryon condensates. This yields the same results as obtained through the relativistic Hartree approximation of summing tadpole diagrams for the baryon propagator. Such a vacuum is then generalized to include quantum effects from meson fields through scalar-meson condensates which amounts to summing over a class of multiloop diagrams. The method is applied to study properties of nuclear matter and leads to a softer equation of state giving a lower value of the incompressibility than would be reached without quantum effects. The density-dependent effective sigma mass is also calculated including such vacuum polarization effects.
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Metadaten
Author:Amruta Mishra, P. K. Panda, Stefan Schramm, Joachim Reinhardt, Walter Greiner
URN:urn:nbn:de:hebis:30-30118
Document Type:Article
Language:English
Date of Publication (online):2006/07/14
Year of first Publication:1997
Publishing Institution:Univ.-Bibliothek Frankfurt am Main
Release Date:2006/07/14
Source:Physical Review C 56(3), S. 1380-1388 (1997), ©1997 The American Physical Society, http://link.aps.org/abstract/PRC/v56/p1380
HeBIS PPN:266047106
Institutes:Physik
Dewey Decimal Classification:530 Physik
PACS-Classification:21.30.-x Nuclear forces (see also 13.75.Cs Nucleon-nucleon interactions)
Sammlungen:Universitätspublikationen
Licence (German):License Logo Veröffentlichungsvertrag für Publikationen

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