Energy dependence of hard bremsstrahlung production in proton-proton collisions in the Delta(1232) region

Abstract

Hard bremsstrahlung production in proton-proton collisions has been studied with the ANKE spectrometer at COSY-Juelich in the energy range of 353-800 MeV by detecting the final proton pair {pp}_s from the pp -> {pp}_s reaction with very low excitation energy. Differential cross sections were measured at small diproton c.m. angles from 0 to 20 degrees and the average over this angular interval reveals a broad peak at a beam energy around 650 MeV with a FWHM of about 220 MeV, suggesting the influence of Delta(1232)N intermediate states. Comparison with deuteron photodisintegration shows that the cross section for diproton production is up to two orders of magnitude smaller, due largely to differences in the selection rules.

14 pages, 5 figures

References in corpus (8)

• Probing Cold Dense Nuclear Matter
• Updated analysis of NN elastic scattering to 3 GeV
• Dependence of two-nucleon momentum densities on total pair momentum
• Hard Photodisintegration of a Proton Pair
• Observation of inverse diproton photodisintegration at intermediate energies
• Predictions of striking energy and angular dependence in pp --> (pp)_S-wave pi^0 production
• Interaction current in $pp\to pp\gamma$
• Polarization Observables in Deuteron Photodisintegration below 360 MeV

Cited by in corpus (6)

• Differential cross section and analysing power of the pp -> {pp\}_s pi0 reaction at 353 MeV
• Gauge-invariant formulation of $NN\to NN\gamma$
• Measurement and analysis of the pp -> pp gamma reaction at 310 MeV
• Resonance-like coherent production of a pion pair in the reaction $pd\to pd\pi \pi$ in the GeV region
• A model-independent analysis of p + p --> pp(1S0) + gamma
• Resonant behavior of the $pp\to \{pp{\}}_s{\pi }^0$ reaction at the energy $\sqrt{s}$ = 2.65 GeV