COHERENT π<SUP>0</SUP> PHOTOPRODUCTION IN THE QUASI-Δ<SUB>33</SUB> DOORWAY STATE MODEL

YU Zi-Qiang; XU Cheng-Xian; MA Wei-Xing; WANG Ying-Cai

Chinese Physics C> 1983, Vol. 7> Issue(4) : 466-472

COHERENT π⁰ PHOTOPRODUCTION IN THE QUASI-Δ₃₃ DOORWAY STATE MODEL

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Abstract：
The quasi-Δ₃₃ doorway state model, previously developed to describe pion-nucleus scattering ^[1], is applied to the study of coherent π⁰ photoproduction on nuclei. The unifying feature of this approach for pion elastic scattering and photoproduction are briefly discussed. We compare our sesults with W. Weise's isobar-hole model calculations and plane wave impulse approximation calculations. The results are presented for ¹⁶O(γ, π⁰)¹⁶O and ¹²C(γ, π⁰)¹²C, and compared to the available experimental data. It has a large suppression for the cross section compared with the impule approximation prediction.

References

[1]

高琴等, 高能物理与核物理, 5(1981), 176,[2] W. Weise, Nucl. Phys., A358(1981), 163C.[3] E. Oset and W. Weise, Nucl. Phys., A368(1981), 375.[4] B Meeking, Proc. Int. Conf. on Nuclear Physics with Electromagnetic Interactions, Mainz 1979, Lecture Notes in Physics 108(1979): 382. H Rost, thesis, Univ. of Bonn (1980).[5] J. H. Koch, Phys. Rev., C20(1979), 235[6] G. E.Brown and W. Weise, Phys. Report, 22C(1975), 279.[7] 马维兴, 余自强, 徐承先, “在△33准门口态模型中π-12C的弹性散射”, 高能物理与核物理, 2(1983),186.

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YU Zi-Qiang, XU Cheng-Xian, MA Wei-Xing and WANG Ying-Cai. COHERENT π⁰ PHOTOPRODUCTION IN THE QUASI-Δ₃₃ DOORWAY STATE MODEL[J]. Chinese Physics C, 1983, 7(4): 466-472.

YU Zi-Qiang, XU Cheng-Xian, MA Wei-Xing and WANG Ying-Cai. COHERENT π⁰ PHOTOPRODUCTION IN THE QUASI-Δ₃₃ DOORWAY STATE MODEL[J]. Chinese Physics C, 1983, 7(4): 466-472. shu

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Received: 1900-01-01
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

COHERENT π⁰ PHOTOPRODUCTION IN THE QUASI-Δ₃₃ DOORWAY STATE MODEL

Corresponding author: YU Zi-Qiang,

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1983-08-05

Abstract: The quasi-Δ₃₃ doorway state model, previously developed to describe pion-nucleus scattering ^[1], is applied to the study of coherent π⁰ photoproduction on nuclei. The unifying feature of this approach for pion elastic scattering and photoproduction are briefly discussed. We compare our sesults with W. Weise's isobar-hole model calculations and plane wave impulse approximation calculations. The results are presented for ¹⁶O(γ, π⁰)¹⁶O and ¹²C(γ, π⁰)¹²C, and compared to the available experimental data. It has a large suppression for the cross section compared with the impule approximation prediction.