Predictions of striking energy and angular dependence in pp --> (pp)_S-wave pi^0 production

Abstract

A phenomenological calculation from threshold to 800 MeV of the initial proton beam energy is presented to describe recent data on the reaction pp --> (pp)_S-wave pi^0 with a low energy cut on the final state diproton excitation energy. A strong forward dip is obtained in the differential cross section as in the data from COSY at 800 MeV, although the absolute value of the forward cross section is too low. Earlier low energy data from CELSIUS are reasonably well reproduced. In the unexplored energy interval between these two experiments the model predicts a spectacular energy dependence both in the forward direction and in the angle-integrated cross section.

arXiv comment9 pages, 4 figures

References in corpus (7)

• Meson production in nucleon--nucleon collisions close to the threshold
• Towards a field theoretic understanding of NN->NNpi
• Role of heavy-meson exchange in pion production near threshold
• The reaction $pp\to pp{\pi }^0$ near threshold
• Off shell pi N amplitude and the p p->p p pi0 reaction
• Production of the 1S0 diproton in the pp -> pp pi0 reaction at 0.8 GeV
• Partial-wave analysis of $\vec{p}\vec{p}\to pp{\pi }^{\circ }$ data

Cited by in corpus (5)

• Energy dependence of forward 1S0 diproton production in the pp -> pp pi0 reaction
• Energy dependence of hard bremsstrahlung production in proton-proton collisions in the Delta(1232) region
• Dynamics of ${}^1{S}_0$ diproton formation in the $pd\to \{pp{\}}_{s}n$ and $pN\to \{pp{\}}_s\pi$ reactions in the GeV region
• Anisotropy in the pion angular distribution of the reaction pp -> pp pi0 at 400 MeV
• Charged and neutral pion production in the S-matrix approach