EFFECTS OF RESCATTERING OF PIONS IN THE REACTION GAMMA-D-]D-PI-0 AND THE PROBLEM OF DIBARYON RESONANCES

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作者：
STOLETNII, IV
REKALO, MP
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SOVIET JOURNAL OF NUCLEAR PHYSICS-USSR | 1992年 / 55卷 / 09期
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O57 [原子核物理学、高能物理学];
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070202 ;
摘要：
Pion-rescattering effects are studied in coherent production of neutral pions in the reaction gammad --> dpi0. The hypothesis of factorization of the amplitudes of the reactions gammaN --> Npi and piN --> Npi and of the deuteron form factors in calculating the amplitude of the reaction gammad --> dpi0 is reasonable in a wide range of photon energies 0.3 less-than-or-equal-to E(gamma) less-than-or-equal-to 1 GeV and small angles theta (theta < 90-degrees). Inclusion of rescattering effects in this kinematic region improves significantly the agreement between the theory and the existing experimental data. However, such a model does not work in the region of large angles theta (theta > 90-degrees). Therefore, it is difficult to interpret uniquely the experimental data in this angular range in order to clarify the role of dibaryon resonances.
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页码：1338 / 1344
页数：7
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