Dynamical model for Pion - Nucleon Bremsstrahlung
A. Mariano, G. López Castro
Abstract
A dynamical model based on effective Lagrangians is proposed to describe the bremsstrahlung reaction πN πN γ at low energies. The Δ(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 πN γ 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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