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The reaction γ +d → π+ + π− +p + n between 570 and 850 MeV andΔ ++ Δ − production |
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| Authors: | M Asai I Endo M Harada S Kasai K Niki Y Sumi S Kato K Maruyama Y Murata M Muto K Yoshida K Iwatani H Hasai H Ito T Maki C Rangacharyulu H Shimizu Y Wada |
| Institution: | 1. Department of Physics, Hiroshima University, 724, Higashi-Hiroshima, Japan 11. Department of Physics, Faculty of General Education, Yamagata University, 990, Yamagata, Japan 12. Meiji College of Pharmacy, 154, Tokyo, Japan 2. Department of Electrical Engineering, Hiroshima Institute of Technology, 731-51, Hiroshima, Japan 4. Institute for Nuclear Study, University of Tokyo, 188, Tanashi, Japan 13. Institute for Nuclear Study, University of Tokyo, 188, Tanashi, Japan 3. Ricoh Co. Ltd., Bunkyo-ku, 112, Tokyo, Japan 6. Department of Applied Physics and Chemistry, Hiroshima University, 724, Higashi-Hiroshima, Japan 7. Department of Physics, Saga University, 840, Saga, Japan 8. University of Occupational and Environmental Health, 807, Kitakyushu, Japan 9. Department of Physics, University of Saskatchewan, S7N 0W0, Saskatoon, Canada 14. Sumisho Computer Service Corporation, 101, Tokyo, Japan |
| Abstract: | The reaction γ+d → π++π? +p + n has been measured in a kinematically complete way at incident photon energies from 570 to 850 MeV in steps of 40 MeV. From detailed comparison of measured data with results of event simulations, it is concluded that three different mechanisms, the quasi-free, double-delta and phase space productions, contribute to the reaction. Each of the cross sections corresponding to these mechanisms is determined separately. |
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