出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We construct a relativistic and unitary approach to pion- and photon-nucleon
scattering taking into account the inelastic , N, !N, N;K;K channels. Our
scheme dynamically generates the s- and d-wave nucleon resonances N(1535), N(1650),
N(1520) and N(1700) and isobar resonances (1620) and (1700) in terms of quasilocal
two-body interaction terms. We obtain a fair description of the experimental data
relevant for slow vector-meson propagation in nuclear matter. The s-wave - and !-meson
nucleon scattering amplitudes, which de ne the leading density modi cation of the - and
!-meson spectral functions in nuclear matter, are predicted.
