Experimental study of the γp→ηp reaction with the Crystal Ball detector at the Mainz Microtron (MAMI-C)
- 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.
- Zehr, F.
DOIAbstract
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 predicti...
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