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ISSN - 03702693, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 1995, vol. 356, p. 8-12

The pp → ppπ0 reaction near the kinematical threshold

Bondar A., Calén H., Carius S., Ekström C., Fransson K., Gustafsson L., Häggström S., Höistad B., Johansson A., Johansson T., Kilian K., Kullander S., Kupść A., Kuzmin A., Morosov B., Mörtsell A., Oelert W., Povtorejko A., Reistad D., Ruber R., Sandukovsky S., Schuberth U., Shwartz B., Stepaniak J., Sukhanov A., Tchernyshev V., Waters M., Wilhelmi Z., Zabierowski J., Złomańczuk J.

The reaction pp → ppπ0 has been measured using electron-cooled protons incident on an internal gas-jet target at seven different incident beam energies, from 280.7 MeV (1 MeV above the reaction threshold) up to 310.2 MeV. The pions were measured by their decay photons. In the overlapping energy region, the measured total cross sections agree with those measured in a recent Indiana experiment. The angular distributions are consistent with a 3P0 → 1S0s0 transition in the full energy range studied. The kinematical distributions are well described when taking into account the final state and the Coulomb interactions. © 1995.