Experimental study of the γp→ηp reaction with the Crystal Ball detector at the Mainz Microtron (MAMI-C)

McNicoll, E.F. et al. (2010) Experimental study of the γp→ηp reaction with the Crystal Ball detector at the Mainz Microtron (MAMI-C). Physical Review C, 82(3), 035208. (doi: 10.1103/PhysRevC.82.035208)

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Publisher's URL: http://dx.doi.org/10.1103/PhysRevC.82.035208


The γp→ηp 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 η-meson production. Our accumulation of 3.8×106 γp→ηp→3π0p→6γp events allows a detailed study of the reaction dynamics. The γp→ηp 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 η 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.

Item Type:Articles
Additional Information:I proposed this measurement and supervised E.McNicoll who worked on the project for her PhD. I was also responsible for several major components of the experiment: the Glasgow Tagger, the trigger system and online/offline software. I played a leading role in running the experiment, supervising the data analysis and the drafting of the publication.
Glasgow Author(s) Enlighten ID:Glazier, Dr Derek and McGeorge, Dr John and Robinson, Mr Jamie and Downie, Dr Evangeline and MacGregor, Professor Douglas and McKinnon, Dr Bryan and Livingston, Dr Kenneth and Codling, Mr Richard and McNicoll, Miss Eilidh and Annand, Dr John and Kellie, Dr James and Hamilton, Dr David and Rosner, Professor Guenther
Authors: McNicoll, E.F., Prakhov, S., Strakovsky, I.I., Aguar-Bartolome, P., Akasoy, L.K., Annand, J.R.M., Arends, H.J., Arndt, R.A., Azimov, Y.I., Bantawa, K., Beck, R., Bekrenev, V.S., Berghauser, H., Braghieri, A., Branford, D., Briscoe, W.J., Brudvik, J., Cherepnya, S., Codling, R.F.B., Demissie, B.T., Downie, E.J., Drexler, P., Fil'kov, L.V., Fix, A., Freehart, B., Glazier, D.I., Gregor, R., Hamilton, D., Heid, E., Hornidge, D., Jaegle, I., Jahn, O., Jude, T.C., Kashevarov, V.L., Kellie, J.D., Keshelashvili, I., Kondratiev, R., Korolija, M., Kotulla, M., Koulbardis, A.A., Kruglov, S.P., Krusche, B., Lisin, V., Livingston, K., MacGregor, I.J.D., Maghrbi, Y., Manley, D.M., Marinides, Z., Martinez, M., McGeorge, J.C., McKinnon, B., Mekterovic, D., Metag, V., Micanovic, S., Middleton, D., Mushkarenkov, A., Nefkens, B.M.K., Nikolaev, A., Novotny, R., Ostrick, M., Otte, P.B., Oussena, B., Paris, M.W., Pedroni, P., Pheron, F., Polonski, A., Robinson, J., Rosner, G., Rostomyan, T., Schumann, S., Sikora, M.H., Sober, D.I., Starostin, A., Suarez, I.M., Supek, I., Thiel, M., Thomas, A., Tiator, L., Unverzagt, M., Watts, D.P., Werthmuller, D., Workman, R.L., Zamboni, I., and Zehr, F.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review C
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