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

V. L. Kashevarov, A. Fix, P. Aguar-Bartolome, L. K. Akasoy, J. R. M. Annand, H. J. Arends, K. Bantawa, R. Beck, V. Bekrenev, H. Berghaeuser, A. Braghieri, D. Branford, W. J. Briscoe, J. Brudvik, S. Cherepnya, R. F. B. Codling, B. T. Demissie, E. J. Downie, P. Drexler, L. V. Fil'kovD. I. Glazier, R. Gregor, D. Hamilton, E. Heid, D. Hornidge, I. Jaegle, O. Jahn, T. C. Jude, J. D. Kellie, I. Keshelashvili, R. Kondratiev, M. Korolija, M. Kotulla, A. Koulbardis, S. Kruglov, B. Krusche, V. Lisin, K. Livingston, I. J. D. MacGregor, Y. Maghrbi, D. M. Manley, M. Martinez-Fabregate, J. C. McGeorge, E. F. McNicoll, D. Mekterovic, V. Metag, S. Micanovic, D. Middleton, A. Mushkarenkov, B. M. K. Nefkens, A. Nikolaev, R. Novotny, M. Ostrick, P. B. Otte, B. Oussena, P. Pedroni, F. Pheron, A. Polonski, S. N. Prakhov, J. Robinson, G. Rosner, T. Rostomyan, S. Schumann, M. H. Sikora, D. Sober, A. Starostin, I. I. Stakovsky, I. M. Suarez, I. Supek, C. Tarbert, M. Thiel, A. Thomas, M. Unverzagt, D. P. Watts, D. Werthmueller, I. Zamboni, F. Zehr

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Pages (from-to)551-554
Number of pages4
JournalPhysics Letters B
Volume693
Issue number5
DOIs
Publication statusPublished - 18 Oct 2010

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