Dynamical model for Pion - Nucleon Bremsstrahlung

Details Dynamical model for Pion - Nucleon Bremsstrahlung Dynamical model for Pion - Nucleon Bremsstrahlung

2000-03-31

arxiv.org/abs/nucl-th/0003074v1

Phys.Rev. C62 (2000) 014604

Physics

Nuclear Physics

Nuclear Theory

16 pages, latex, 6 eps figures. Accepted for publication in Physical Review C

Scientific paper

10.1103/PhysRevC.62.014604

A dynamical model based on effective Lagrangians is proposed to describe the bremsstrahlung reaction $ \pi N \to \pi N \gamma$ at low energies. The $\Delta(1232)$ degrees of freedom are incorporated in a way consistent with both, electromagnetic gauge invariance and invariance under contact transformations. The model also includes the initial and final state rescattering of hadrons via a T-matrix with off-shell effects. The $\pi N \gamma$ differential cross sections are calculated using three different T-matrix models and the results are compared with the soft photon approximation, and with experimental data. The aim of this analysis is to test the off-shell behavior of the different T-matrices under consideration.

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