Density dependence of meson - nucleon vertices in nuclear matter

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.

16 pages, epsfig.sty, 5 figures (Ps).The section "Discussions and summary" has been rewritten. Accepted for publication in Nucl. Phys. A

References in corpus (4)

• Properties of Hadrons in the Nuclear Medium
• Fluctuations In ``BR-Scaled'' Chiral Lagrangians
• Nuclear Matter Studies with Density-dependent Meson-Nucleon Coupling Constants
• The Skyrmion in the nucleus

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