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Dynamical model for Pion - Nucleon Bremsstrahlung

A. Mariano·G. López Castro
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Abstract

A dynamical model based on effective Lagrangians is proposed to describe the bremsstrahlung reaction $ πN \to 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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A. Mariano, G. López Castro. 2000-03-31. Dynamical model for Pion - Nucleon Bremsstrahlung. https://doi.org/10.1103/physrevc.62.014604

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