Compton scattering by the proton through θcms = 75° in the Δ-resonance region

Using the tagged-photon beam of MAMI (Mainz) differential cross-sections for Compton scattering by the proton through θcms = 75° have been measured for the Δ-resonance region from 200 to 410 MeV. The data put a new constraint on the M1+32 photoproduction amplitude in the resonance, |M1+32| = (39.6 ±...

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Bibliographic Details
Published in:Physics letters. B 1996-09, Vol.384 (1-4), p.37-42
Main Authors: Peise, J., Hünger, A., Ahrens, J., Anthony, I., Arends, H.-J., Beck, R., Capitani, G.P., Dolbilkin, B., Falkenberg, H., Hall, S.J., Jennewein, P., Kellie, J.D., Kondratjev, R., Kordsmeier, R., Lisin, V., L'vov, A.I., Miller, G.J., Molinari, C., Reolon, A.R., Robbiano, A., Sanzone, M., Schmitz, M., Schneider, M., Schumacher, M., Selke, O., Walcher, Th, Wissmann, F.
Format: Article
Language:English
Subjects:
Compton scattering
Dispersion relation
Multipole distribution
Proton
Δ-resonance
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Summary:Using the tagged-photon beam of MAMI (Mainz) differential cross-sections for Compton scattering by the proton through θcms = 75° have been measured for the Δ-resonance region from 200 to 410 MeV. The data put a new constraint on the M1+32 photoproduction amplitude in the resonance, |M1+32| = (39.6 ± 0.4) · 10−3mπ+−1 at 320 MeV, which is (2.8 ± 0.9) % less than given by the recent analysis SM95 of the Virginia group.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(96)00709-5