TY - JOUR
A1 - Mishra, Amruta
A1 - Panda, P. K.
A1 - Schramm, Stefan
A1 - Reinhardt, Joachim
A1 - Greiner, Walter
T1 - Structure of the vacuum in nuclear matter: a nonperturbative approach
N2 - 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.
Y1 - 1997
UR - http://publikationen.stub.uni-frankfurt.de/frontdoor/index/index/docId/2383
UR - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hebis:30-30118
ER -