Proton-Proton Bremsstrahlung

We investigate proton-proton bremsstrahlung by using a field-theory, as opposed to a potential, model. We adopt the one-pion-exchange model and relate part of the matrix element to the photon-pion production matrix element, which is expressed in terms of dispersion relations. A detailed analysis shows that the Born-approximation diagrams give the dominant contribution and that the diagrams involving $N^{*}$ or $\rho$ resonances are negligible for the energy considered. We find that our results, unlike those of the potential model, seem to give satisfactory agreement with experimental data.