arXiv:nucl-th/9806062·v3·Nuclear Theory
Density dependence of meson - nucleon vertices in nuclear matter
A.M. Rakhimov (Institute of Nuclear Physics, Academy of Science, Tashkent, Uzbekistan)🇺🇿 · F.C. Khanna (University of Alberta, Edmonton, Canada)🇨🇦 · U.T. Yakhshiev🇺🇿 · M.M.Musakhanov (Tashkent State University, Tashkent, Uzbekistan)🇺🇿
Abstract
Changes in the meson-nucleon coupling constant and the vertex form factor in nuclear matter are studied in a modified Skyrme Lagrangian including the sigma-meson field that satisfies the scale invariance. Renormalization of the axial-vector coupling constant, and the nucleon mass are studied in a consistent model. The results are consistent with the empirical evidence. A calculation of pi N commutator, sigma-term, indicates that the medium changes its magnitude considerably.
Comments: 16 pages, epsfig.sty, 5 figures (Ps).The section "Discussions and summary" has been rewritten. Accepted for publication in Nucl. Phys. A