A Unitary model for meson nucleon scattering

Feuster, T.; Mosel, U.

doi:10.1103/PhysRevC.58.457

A Unitary model for meson nucleon scattering

T. Feuster
(
- Giessen U.
)
,
U. Mosel
(
- Giessen U. and
- Washington U., Seattle
)

Aug, 1997

53 pages

Published in:

Phys.Rev.C 58 (1998) 457-488

e-Print:

nucl-th/9708051 [nucl-th]

DOI:

10.1103/PhysRevC.58.457

Report number:

UGI-97-12A

View in:

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Abstract:

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.

Note:

Revised version. 60 pages, 17 figures. Two figures and a short discussion (\pi N \to \eta N, K \Lambda amplitudes) added, typos and minor errors in the citations corrected Report-no: UGI-97-13

meson nucleon: exclusive reaction
Bethe-Salpeter equation: coupled channel
effective Lagrangian
potential
background
nucleon resonance: coupling
N(1535)
form factor
S-matrix
unitarity

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