Sensitivity ofppbremsstrahlung on low-energyNNinteraction

Abstract

In this paper we investigate possible reasons for the differences found in some kinematic regions between existing microscopic pp bremsstrahlung models and experimental data. It is shown that this is partly the result of an inaccurate description of the elastic nucleon-nucleon (NN) T matrix at low energies. We show that for the phase space probed by the recent KVI experiment, Coulomb corrections do not influence the observables. The difference between theory and experiment is reduced after the NN one-boson exchange model is refitted to the pp phase shifts, however, a sizable discrepancy persists.