The proton-proton bremsstrahlung is investigated within a coupled-channel model with the Δ degree of freedom. The model is consistent with the NN scattering up to 1 GeV and the γNΔ vertex determined in the study of pion photoproduction reaction. It is found that the Δ excitation can significantly improve the agreements with the pp→ppγ at =280 MeV. Predictions at =550 and 800 MeV are presented for future experimental tests.
- Received 9 December 1994
- Published in the issue dated May 1995
© 1995 The American Physical Society