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arXiv · 0901.3888

Photoproduction of pi^0 eta on protons and the Delta(1700)D_{33} resonance

V. L. Kashevarov·A. Fix·P. Aguar-Bartolome·L. K. Akasoy·J. R. M. Annand·H. J. Arends·K. Bantawa·R. Beck·V. Bekrenev·H. Berghauser·B. Boillat·A. Braghieri·D. Branford·W. J. Briscoe·J. Brudvik·S. Cherepnya·E. J. Downie·P. Drexler·L. V. Fil'kov·D. I. Glazier·R. Gregor·E. Heid·D. Hornidge·O. Jahn·T. C. Jude·A. Knezevic·R. Kondratiev·M. Korolija·M. Kotulla·A. Koulbardis·S. Kruglov·B. Krusche·V. Lisin·K. Livingston·I. J. D. MacGregor·Y. Maghrbi·D. M. Manley·M. Martinez-Fabregate·J. C. McGeorge·E. F. McNicoll·D. Mekterovic·V. Metag·S. Micanovic·B. M. K. Nefkens·A. Nikolaev·R. Novotny·M. Ostrick·R. O. Owens·P. Pedroni·F. Pheron·A. Polonski·J. Robinson·S. N. Prakhov·G. Rosner·T. Rostomyan·S. Schumann·D. Sober·A. Starostin·I. M. Suarez·I. Supek·C. M. Tarbert·M. Thiel·A. Thomas·M. Unverzagt·D. P. Watts·I. Zamboni·F. Zehr
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Abstract

Total and differential cross sections for the reaction gamma p -> pi^o eta p have been measured with the Crystal Ball/TAPS detector using the tagged photon facility at the MAMI C accelerator in Mainz. In the energy range E_gamma=0.95-1.4 GeV the reaction is dominated by the excitation and sequential decay of the Delta(1700)D33 resonance. Angular distributions measured with high statistics allow us to determine the ratio of hadronic decay widths \Gamma_{\eta \Delta}/\Gamma_{\pi S11} and the ratio of the helicity amplitudes A_{3/2}/A_{1/2} for this resonance.

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V. L. Kashevarov, A. Fix, P. Aguar-Bartolome, L. K. Akasoy, J. R. M. Annand, H. J. Arends, K. Bantawa, R. Beck, V. Bekrenev, H. Berghauser, B. Boillat, A. Braghieri, D. Branford, W. J. Briscoe, J. Brudvik, S. Cherepnya, E. J. Downie, P. Drexler, L. V. Fil'kov, D. I. Glazier, R. Gregor, E. Heid, D. Hornidge, O. Jahn, T. C. Jude, A. Knezevic, R. Kondratiev, M. Korolija, M. Kotulla, A. Koulbardis, S. Kruglov, B. Krusche, V. Lisin, K. Livingston, I. J. D. MacGregor, Y. Maghrbi, D. M. Manley, M. Martinez-Fabregate, J. C. McGeorge, E. F. McNicoll, D. Mekterovic, V. Metag, S. Micanovic, B. M. K. Nefkens, A. Nikolaev, R. Novotny, M. Ostrick, R. O. Owens, P. Pedroni, F. Pheron, A. Polonski, J. Robinson, S. N. Prakhov, G. Rosner, T. Rostomyan, S. Schumann, D. Sober, A. Starostin, I. M. Suarez, I. Supek, C. M. Tarbert, M. Thiel, A. Thomas, M. Unverzagt, D. P. Watts, I. Zamboni, F. Zehr. 2009-01-25. Photoproduction of pi^0 eta on protons and the Delta(1700)D_{33} resonance. https://doi.org/10.1140/epja/i2009-10868-4

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