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Experimental study of the gamma p -< eta p reaction with the Crystal Ball detector at the Mainz Microtron (MAMI-C)

McNicoll, E. F. and Prakhov, S. and Strakovsky, I. I. and Aguar-Bartolome, P. and Akasoy, L. K. and Annand, J. R. M. and Arends, H. J. and Arndt, R. A. and Azimov, Ya. I. and Bantawa, K. and Beck, R. and Bekrenev, V. S. and Berghaeuser, H. and Braghieri, A. and Branford, D. and Briscoe, W. J. and Brudvik, J. and Cherepnya, S. and Codling, R. F. B. and Demissie, B. T. and Downie, E. J. and Drexler, P. and Fil`kov, L. V. and Fix, A. and Freehart, B. and Glazier, D. I. and Gregor, R. and Hamilton, D. and Heid, E. and Hornidge, D. and Jaegle, I. and Jahn, O. and Jude, T. C. and Kashevarov, V. L. and Kellie, J. D. and Keshelashvili, I. and Kondratiev, R. and Korolija, M. and Kotulla, M. and Koulbardis, A. A. and Kruglov, S. P. and Krusche, B. and Lisin, V. and Livingston, K. and MacGregor, I. J. D. and Maghrbi, Y. and Manley, D. M. and Marinides, Z. and Martinez, M. and McGeorge, J. C. and McKinnon, B. and Mekterovic, D. and Metag, V. and Micanovic, S. and Middleton, D. and Mushkarenkov, A. and Nefkens, B. M. K. and Nikolaev, A. and Novotny, R. and Ostrick, M. and Otte, P. B. and Oussena, B. and Paris, M. W. and Pedroni, P. and Pheron, F. and Polonski, A. and Robinson, J. and Rosner, G. and Rostomyan, T. and Schumann, S. and Sikora, M. H. and Sober, D. I. and Starostin, A. and Suarez, I. M. and Supek, I. and Thiel, M. and Thomas, A. and Tiator, L. and Unverzagt, M. and Watts, D. P. and Werthmueller, D. and Workman, R. L. and Zamboni, I. and Zehr, F.. (2010) Experimental study of the gamma p -< eta p reaction with the Crystal Ball detector at the Mainz Microtron (MAMI-C). Physical review. C, Nuclear physics, Vol. 82, H. 3 , 035208.

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Official URL: http://edoc.unibas.ch/dok/A5842046

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Abstract

The gamma p -< eta p reaction has been measured with the Crystal Ball and TAPS multiphoton spectrometers in the energy range from the production threshold of 707 MeV to 1.4 GeV (1.49 >= W >= 1.87 GeV). Bremsstrahlung photons produced by the 1.5-GeV electron beam of the Mainz Microtron MAMI-C and momentum analyzed by the Glasgow tagging spectrometer were used for the eta-meson production. Our accumulation of 3.8 x 10(6) gamma p -< eta p -< 3 pi(0) p -< 6 gamma p events allows a detailed study of the reaction dynamics. The gamma p -< eta p differential cross sections were determined for 120 energy bins and the full range of the production angles. Our data show a dip near W = 1680 MeV in the total cross section caused by a substantial dip in eta production at forward angles. The data are compared to predictions of previous SAID and MAID partial-wave analyses and to the latest SAID and MAID fits that included our data.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Hadronenphysik (Krusche)
UniBasel Contributors:Krusche, Bernd
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:American Institute of Physics
ISSN:0556-2813
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:14 Sep 2012 07:18
Deposited On:14 Sep 2012 06:47

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