On the structure of the first excited nucleon states
Journal Article
·
· AIP Conference Proceedings
- Institut fuer Kernphysik, Forschungszentrum Juelich, D-52425 Juelich (Germany)
Effective meson Lagrangians are the appropriate theoretical tool for the non-perturbative regime of QCD which in the present work is applied to pion-nucleon scattering. We focus our interest on the first excited states of the nucleon. We discuss the interplay between genuine poles and resonance behavior due to the meson-baryon dynamics. In the case of the {delta}-isobar we find that the non-pole background plays a crucial role for the quantitative understanding of the {delta} width. The P{sub 11} partial wave of {pi}N scattering is described without inclusion of a genuine N* (Roper) resonance. In the pion production region the effect of coupling to the reaction channels {pi}{delta} and {sigma}N is investigated.
- OSTI ID:
- 21175461
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 412; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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