COHERENT π0 PHOTOPRODUCTION IN THE QUASI-Δ33 DOORWAY STATE MODEL |
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Authors: | MA Wei-hsing WANG Ying-cai YU Zi-qiang XU Cheng-xian |
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Institution: | 1. Institute of High Energy Physics, Acadenia Sinica, Beijing, China;
2. Department of Physics, Nankai University, Tianjin, China |
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Abstract: | The quasi-Δ, doorway state model, previously developed to describe pion-nucleus scattering, 1] is applied to the study of cohe-rent π photoproduction on nuclei.The unifying features of this approach for pion elastic scattering and photoproduction are briefly discussed. The relationship to W. Weise's isobar-hole model calculation and plane wave impulse approximation calculations are examined. The results are presented for 16O(γ, π0)16O and 12C(γ, π0)12C, and compared with the available experimental data. It has a large suppression of cross section from the impulse approximation prediction. |
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