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
T2  - Physical review. C, Nuclear physics
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.ub.uni-frankfurt.de/frontdoor/index/index/docId/2383
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30-30118
SN  - 1089-490X
SN  - 2469-9993
SN  - 2469-9985
SN  - 0556-2813
N1  - ©1997 American Physical Society
VL  - 3.Ser. 56
IS  - 3
SP  - 1380
EP  - 1388
PB  - Inst.
CY  - Woodbury, NY
ER  -