arXiv:nucl-th/9602036·v1·Nuclear Theory
How reliable is the mean-field Nuclear Matter description for supporting Chiral Effective Lagrangians?
A. Delfino (Instituto de Fisica, Universidade Federal Fluminense, Brasil)🇧🇷 · M. Malheiro (Department of Physics, University of Maryland at College Park, USA)🇧🇷 · T. Frederico (Instituto Tecnologico da Aeronautica, CTA, Brasil)🇧🇷
Abstract
The link between non-linear chiral effective Lagrangians and the Walecka model description of bulk nuclear matter [1] is questioned. This fact is by itself due to the Mean Field Approximation (MFA) which in nuclear mater makes the picture of a nucleon-nucleon interaction based on scalar(vector) meson exchange, equivalent to the description of a nuclear matter based on attractive and repulsive contact interactions. We present a linear chiral model where this link between the Walecka model and an underlying to chiral symmetry realization still holds, due to MFA.
Comments: 5 pages latex file after being uncompressed. Submitted to Phys. Letts. B