Radiative pi0 photoproduction on protons in the Delta+(1232) region
Abstract
The reaction gamma p -> p pi0 gamma' has been measured with the Crystal Ball / TAPS detectors using the energy-tagged photon beam at the electron accelerator facility MAMI-B. Energy and angular differential cross sections for the emitted photon gamma' and angular differential cross sections for the pi0 have been determined with high statistics in the energy range of the Delta+(1232) resonance. Cross sections and the ratio of the cross section to the non-radiative process gamma p -> p pi0 are compared to theoretical reaction models, having the anomalous magnetic moment kappa_Delta+ as free parameter. As the shape of the experimental distributions is not reproduced in detail by the model calculations, currently no extraction of kappa_Delta+ is feasible.
Keywords
Cite
@article{arxiv.1001.3626,
title = {Radiative pi0 photoproduction on protons in the Delta+(1232) region},
author = {S. Schumann and B. Boillat and E. J. Downie and P. Aguar-Bartolomé and J. Ahrens and J. R. M. Annand and H. J. Arends and R. Beck and V. Bekrenev and A. Braghieri and D. Branford and W. J. Briscoe and J. W. Brudvik and S. Cherepnya and R. Codling and P. Drexler and L. V. Fil'kov and D. I. Glazier and R. Gregor and E. Heid and D. Hornidge and O. Jahn and V. L. Kashevarov and R. Kondratiev and M. Korolija and M. Kotulla and D. Krambrich and B. Krusche and M. Lang and V. Lisin and K. Livingston and S. Lugert and I. J. D. MacGregor and D. M. Manley and M. Martinez-Fabregate and J. C. McGeorge and D. Mekterovic and V. Metag and B. M. K. Nefkens and A. Nikolaev and R. Novotny and M. Ostrick and R. O. Owens and P. Pedroni and A. Polonski and S. N. Prakhov and J. W. Price and G. Rosner and M. Rost and T. Rostomyan and D. Sober and A. Starostin and I. Supek and C. M. Tarbert and A. Thomas and M. Unverzagt and Th. Walcher and D. P. Watts and F. Zehr},
journal= {arXiv preprint arXiv:1001.3626},
year = {2010}
}
Comments
14 pages, 19 figures