Hadron Reactions and Urbaryon Rearrangement. I : Effective Resonance Structure
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概要
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By incorporating dynamical aspects of hadron reactions, which closely correspond to the pattern of the urbaryon rearrangement diagram (URD), P_8-B_8 reaction amplitude is constructed in the impact parameter representation. The main dynamical aspects are that the impact parameter to form observed resonances in P_8-B_8 reaction takes an almost universal value and that angular distributions have almost energy-independent dips (with the positions t_0:t_1:t_2 and/or u_0´:u_1´:u_2´≃1:4:9) in such processes that contain the H(s-t dyak) and/or Z(s-u dual) type URD amplitudes. Then the interaction densities of these amplitudes are peaked at a constant value b_0 of the impact parameter, which we call resonant interaction density. The constant b_0 implies a bending effective resonance trajectory lt:α_<eff>~√<s>>___<_<s>≫^1>, and α_<eff> coincides with leading trajectories when s is not large. On the contrary, the interaction density of the X(t-u dual) type URD amplitude has a simple Gaussian form. The s dependence of the interaction densities is described by s-^<γn>_R with γ~0.5, where n_R denotes the number of rearranged urbaryons. Quantitative fit of our amplitude to elastic π-N scattering in the forward hemi-sphere and qualitative fit to other P_8-B_8 reactions in the forward and the backward regions are given. The effective resonances in the URD amplitude and the s-^<γn>_R behaviour imply systematic correlations of resonances in the hadron level and may afford clues to the nature of the urbaryon. The interaction densities are related to hadron electromagnetic form factors.
- 理論物理学刊行会の論文
- 1971-06-25
著者
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Otsuki Shoichiro
Department Of Physics Kyoto University
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Imachi Masahiro
Department Of Physics Kyushu University
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Toyoda Fumihiko
Department Of Electrical And Communication Engineering Kinki University Of School Of Humanity-orient
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Toyoda Fumihiko
The Second Department Kinki University
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OROGUCHI Takashige
Department of Physics Kyushu University
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OTSUKI Shoichiro
Department of Liberal Arts, Kinki University
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