Relativistic calculation of hard bremsstrahlungpp→ppγto discriminate among different kinds ofNNinteractions

Abstract

Previous nonrelativistic calculations have demonstrated a high sensitivity of hard bremsstrahlung $pp\ensuremath{\rightarrow}pp\ensuremath{\gamma}$ at the beam energies of $350--500\phantom{\rule{0.3em}{0ex}}\text{MeV}$ to the kind of nucleon-nucleon potential (meson exchange potentials versus the Moscow one). Here, bremsstrahlung calculations are generalized by means of relativistic considerations (point form dynamics). The necessary formal technique is presented. Resulting cross sections become smaller in comparison with nonrelativistic theory and their angular dependence changes. However, the high sensitivity to the kind of potential continues to exist and is characteristic of the differential cross section even at a relatively low beam energy of ${E}_{0}=280\phantom{\rule{0.3em}{0ex}}\text{MeV}$ where corresponding experimental data do exist. Our calculations give some preliminary indication that one of the versions of the Moscow potential may be valid here.