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Density dependence of meson-nucleon vertices in nuclear matter

✍ Scribed by A.M. Rakhimov; F.C. Khanna; U.T. Yakhshiev; M.M. Musakhanov

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
876 KB
Volume
643
Category
Article
ISSN
0375-9474

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✦ Synopsis

Changes in the meson-nucleon coupling constant and the vertex form factor in nuclear matter are studied in a modified Skyrme Lagrangian including the o--meson field that satisfies the scale invariance. Renormalization of ga, the axial-vector coupling constant, and the nucleon mass are studied in a consistent model. The results are in good agreement with the empirical evidence. A calculation of the ~-N commutator, X-term, indicates that the medium changes its magnitude considerably.

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✍ W. Peters; M. Post; H. Lenske; S. Leupold; U. Mosel πŸ“‚ Article πŸ“… 1998 πŸ› Elsevier Science 🌐 English βš– 918 KB

We calculate the modification of a rho meson in nuclear matter through its coupling to resonance-hole states. Starting from a recently proposed model, we include all four star resonances up to 1.9 GeV. In contrast to previous works, we include not only resonances that couple to the rho in a relative