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Study of the gp-->etap reaction with the Crystal Ball detector at the Mainz Microtron(MAMI-C)

Authors :
McNicoll, E. F.
Prakhov, S.
Strakovsky, I. I.
Aguar-Bartolomepmainz, P.
Akasoy, L. K.
Annand, J. R. M.
Arends, H. J.
Arndt, R. A.
Azimov, Ya. I.
Bantawa, K.
Beck, R.
Bekrenev, V. S.
Berghaeuser, 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.
Werthmueller, D.
Workman, R. L.
Zamboni, I.
Zehr, F.
McNicoll, E. F.
Prakhov, S.
Strakovsky, I. I.
Aguar-Bartolomepmainz, P.
Akasoy, L. K.
Annand, J. R. M.
Arends, H. J.
Arndt, R. A.
Azimov, Ya. I.
Bantawa, K.
Beck, R.
Bekrenev, V. S.
Berghaeuser, 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.
Werthmueller, D.
Workman, R. L.
Zamboni, I.
Zehr, F.
Publication Year :
2010

Abstract

The gp-->etap 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 gp-->etap-->3pi0p-->6gp events allows a detailed study of the reaction dynamics. The gp-->etap 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 thelatest SAID and MAID fits that have included our data.<br />Comment: 15 pages, 12 figures

Details

Database :
OAIster
Publication Type :
Electronic Resource
Accession number :
edsoai.on1181974895
Document Type :
Electronic Resource
Full Text :
https://doi.org/10.1103.PhysRevC.82.035208
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