Density dependence of meson - nucleon vertices in nuclear matter

Details Density dependence of meson - nucleon vertices in nuclear matter Density dependence of meson - nucleon vertices in nuclear matter

1998-06-19

arxiv.org/abs/nucl-th/9806062v3

Nucl.Phys. A643 (1998) 383-401

Physics

Nuclear Physics

Nuclear Theory

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

Scientific paper

10.1016/S0375-9474(98)00561-2

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.

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