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First measurement of the circular beam asymmetry in the (gamma)over-right-arrowp -< pi(0)eta p reaction

Kashevarov, V. L. and Fix, A. and Aguar-Bartolome, P. and Akasoy, L. K. and Annand, J. R. M. and Arends, H. J. and Bantawa, K. and Beck, R. and Bekrenev, V. 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 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 Kellie, J. D. and Keshelashvili, I. and Kondratiev, R. and Korolija, M. and Kotulla, M. and Koulbardis, A. and Kruglov, S. and Krusche, B. and Lisin, V. and Livingston, K. and MacGregor, I. J. D. and Maghrbi, Y. and Manley, D. M. and Martinez-Fabregate, M. and McGeorge, J. C. and McNicoll, E. F. 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 Pedroni, P. and Pheron, F. and Polonski, A. and Prakhov, S. N. and Robinson, J. and Rosner, G. and Rostomyan, T. and Schumann, S. and Sikora, M. H. and Sober, D. and Starostin, A. and Stakovsky, I. I. and Suarez, I. M. and Supek, I. and Tarbert, C. and Thiel, M. and Thomas, A. and Unverzagt, M. and Watts, D. P. and Werthmueller, D. and Zamboni, I. and Zehr, F.. (2010) First measurement of the circular beam asymmetry in the (gamma)over-right-arrowp -< pi(0)eta p reaction. Physics letters. B, Vol. 693, H. 5. pp. 551-554.

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Official URL: http://edoc.unibas.ch/dok/A5842042

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Abstract

The circular photon asymmetry for pi(0)eta photoproduction on the proton was measured for the first time at the tagged photon facility of the MAMI C accelerator using the Crystal Ball/TAPS photon spectrometer. The experimental results are interpreted within a phenomenological isobar model that confirms the dominant role of the Delta(1700)D-33 resonance. The measured asymmetry allows us to identify small contributions from positive-parity resonances via interference terms with the dominant D-33 amplitude. (C) 2010 Elsevier B.V. All rights reserved.
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:North-Holland
ISSN:0370-2693
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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