Meson-Baryon Backward Scattering and Resonance Correlation

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概要

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• Backward meson-baryon scattering is studied by taking the urbaryon rearrangement diagram (URD) into consideration. Analysis of πN backward scattering at 6 GeV/c shows that the resonant part of the helicity amplitude, which corresponds to the Z type URD, behaves as F^Z_<Δλ>∝iH^<(1)>_<1-Δλ>(b_0√<-u'>) with b_0≃5/GeV similarly to in the forward case. Considering that many s-channel resonances with different parities and signatures cancel out with one another leading to a rapid decrease with s in the backward region, it may be rather surprising that the Hankel type structure is observed. In other words, this suggests again importance of the peripheral interaction to form correlated resonances. The nonresonant amplitude corresponding to the X type URD is real and smooth. It is found that natural parity baryon resonances are much more suppressed than unnatural ones, as compared with the prediction of the SU(6) models. A possible scheme of SU(6)breaking is discussed.

• 理論物理学刊行会の論文
• 1975-01-25

著者

• TOYODA Fumihiko

  School of Humanity-Oriented Science and Engineering, Kinki University

• Otsuki Shoichiro

  Department Of Physics Kyoto University

• Imachi Masahiro

  Department Of Physics Kyushu University

• Toyoda Fumihiko

  Department Of Electrical And Communication Engineering Kinki University Of School Of Humanity-orient

• Ghoroku Kazuo

  Department Of Phusics Kyushu University

• TOYODA Fumihiko

  Second Department, Kinki University

• OTSUKI Shoichiro

  Department of Liberal Arts, Kinki University

• OTSUKI Shoichiro

  Department of Physics, Kyusyu University

• Ghoroku Kazuo

  Department of Physics, Fukuoka Institute of Technology

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