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The Dynamical Structure of the Delta-Resonance and its Effect on Two- and Three-Nucleon Systems

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...

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Bibliographic Details
Published in:arXiv.org 1996-03
Main Authors: Kortemeyer, G, Pena, M T, Sauer, P U, Stadler, A
Format: Article
Language:English
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Summary: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.
ISSN:2331-8422