A unitary model for meson-nucleon scattering

Details A unitary model for meson-nucleon scattering A unitary model for meson-nucleon scattering

1997-08-28

arxiv.org/abs/nucl-th/9708051v3

Phys.Rev.C58:457-488,1998

Physics

Nuclear Physics

Nuclear Theory

Revised version. 60 pages, 17 figures. Two figures and a short discussion (\pi N \to \eta N, K \Lambda amplitudes) added, typo

Scientific paper

10.1103/PhysRevC.58.457

In an effective Lagrangian model employing the K-matrix approximation we extract nucleon resonance parameters. To this end we analyze simultaneously all available data for reactions involving the final states $\pi N$, $\pi\pi N$, $\eta N$ and $K \Lambda$ in the energy range $m_N + m_{\pi} \le \sqrt s \le 1.9$ GeV. The background contributions are generated consistently from the relevant Feynman amplitudes, thus significantly reducing the number of free parameters.

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