Bochum 1998 – wissenschaftliches Programm

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HK: Hadronen und Kerne

HK 15: Hadronic Probes II, Nucleon-Nucleon Interaction

HK 15.3: Gruppenbericht

Montag, 16. März 1998, 18:00–18:30, C

Beyond s-wave coupling in non-perturbative SU(3) chiral dynamics — •José Caro, Norbert Kaiser, Thomas Waas, and Wolfram Weise — Technische Universität München, Physik Department T39

The role of p-wave couplings in the low energy scattering of a meson (from the pseudo-scalar octet) and a baryon (from the octet) is studied within a chiral Lagrangian formalism combined with coupled-channel techniques. The pure p-wave terms in the Lagrangian are considered both in Born approximation and non-perturbatively. Calculations are performed at second order in the chiral counting. The range-dependence of the regularized propagators in the coupled-channel scheme is discussed. The properties of the lightest p-wave resonances are analyzed in this context. The whole formalism is applied to eta and kaon photoproduction off nucleons.

Gef"ordert durch GSI und BMBF