Photoproduction of theωmeson on the proton near threshold
I. I. Strakovsky,S. Prakhov,Ya. I. Azimov,P. Aguar-Bartolomé,J. R. M. Annand,H. J. Arends,K. Bantawa,R. Beck,V. Bekrenev,H. Berghäuser,A. Braghieri,W. J. Briscoe,J. Brudvik,S. Cherepnya,R. F. B. Codling,C. Collicott,S. Costanza,B. Demissie,E. J. Downie,P. Drexler,L.V. Filʼkov,D. I. Glazier,R. Gregor,D. Hamilton,E. Heid,D. Hornidge,I. Jaeglé,O. Jahn,T. C. Jude,V. L. Kashevarov,I. Keshelashvili,R. Kondratiev,M. Korolija,M. Kotulla,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. Mekterović,V. Metag,D. G. Middleton,A. Mushkarenkov,B. M. K. Nefkens,A. Nikolaev,R. Novotny,H. Ortega,M. Ostrick,P. B. Otte,B. Oussena,P. Pedroni,F. Pheron,A. Polonski,J. Robinson,G. Rosner,T. Rostomyan,S. Schumann,M. H. Sikora,A. Starostin,I. Supek,M. F. Taragin,C. M. Tarbert,M. Thiel,A. Thomas,M. Unverzagt,D. P. Watts,D. Werthmüller,F. Zehr
Physical review（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 $\gamma p\to\omega p$ 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.
