Photoproduction of the omega meson off the proton near threshold

I I Strakovsky,S N Prakhov,Ya I Azimov, P Aguarbartolome,J R M Annand,H J Arends,K Bantawa, R Beck,V S Bekrenev,H Berghaeuser,A Braghieri,W J Briscoe,J Brudvik,S Cherepnya, R F B Codling, C Collicott,S Costanza,B T Demissie,E J Downie,P Drexler, L V Filkov,D I Glazier,R Gregor,D Hamilton,E Heid,D Hornidge,I Jaegle,O Jahn,T C Jude,V L Kashevarov,I Keshelashvili,R Kondratiev,M Korolija,M Kotulla,A A Koulbardis,S P Kruglov, B Krusche,V Lisin, K Livingston,I J D Macgregor,Y Maghrbi,D M Manley,Z Marinides,J C Mcgeorge,E F Mcnicoll, D Mekterovic, V Metag, D G Middleton,A Mushkarenkov,B M K Nefkens,A V Nikolaev,R Novotny, H Ortega,M Ostrick,P B Otte,B Oussena,P Pedroni,F Pheron,A Polonski, J C Robinson,G Rosner,T Rostomyan,S Schumann,Marek Sikora,Andrei N Starostin,I Supek, M F Taragin, C M Tarbert,M Thiel,A Thomas,M Unverzagt,D P Watts,D Werthmueller,F Zehr

PHYSICAL REVIEW C（2015）

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摘要

An experimental study of omega photoproduction on the proton was conducted by using the Crystal Ball and TAPS multiphoton spectrometers together with the photon tagging facility at the Mainz Microtron MAMI. The gamma p -> omega p differential cross sections are measured from threshold to the incident-photon energy E-gamma = 1.40 GeV (W = 1.87 GeV for the center-of-mass energy) with 15-MeV binning in E-gamma and full production-angle coverage. The quality of the present data near threshold gives access to a variety of interesting physics aspects. As an example, an estimation of the omega N scattering length alpha(omega p) is provided.

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关键词

proton,the<mmlmath xmlnsmml=http//wwww3org/1998/math/mathml><mmlmi>ω</mmlmi></mmlmath>meson

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