Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1996-03-21
Physics
Nuclear Physics
Nuclear Theory
24 pages RevTeX, 10 figures PostScript
Scientific paper
The pion-nucleon interaction in the P33 partial wave is assumed to proceed simultaneously through the excitation of the Delta-isobar and through a phenomenologically introduced non-resonant background potential. The introduction of the background potential allows a more realistic parameterization of the pion-nucleon-Delta vertex compared with the previously used one without background. It also modifies the propagation of the Delta-isobar in the nuclear medium and gives rise to novel effective nucleon-Delta interactions. Their consequences on predictions for observables in the two-nucleon system at intermediate energies and in the three-nucleon bound state are studied.
Kortemeyer Gerd
Pena M. T.
Sauer Peter U.
Stadler Alfred
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