Proton-proton bremsstrahlung below and above pion-threshold: the influence of the $Δ$-isobar

Details Proton-proton bremsstrahlung below and above pion-threshold: the influence of the $Δ$-isobar Proton-proton bremsstrahlung below and above pion-threshold: the influence of the $Δ$-isobar

1994-12-08

arxiv.org/abs/nucl-th/9412013v1

Phys.Rev.C51:2334-2346,1995

Physics

Nuclear Physics

Nuclear Theory

26 pages Revtex, 12 figures are available from the authors upon request (nucvis1@sb.dcs.uga.edu)

Scientific paper

10.1103/PhysRevC.51.2334

The proton-proton bremsstrahlung is investigated within a coupled-channel model with the $\Delta$ degree of freedom. The model is consistent with the $NN$ scattering up to 1 GeV and the $\gamma N\Delta$ vertex determined in the study of pion photoproduction reactions. It is found that the $\Delta$ excitation can significantly improve the agreements with the $pp \rightarrow pp\gamma$ at $E_{lab}=280$ MeV. Predictions at $E_{lab}=550$ and $800$ MeV are presented for future experimental tests.

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