Pion-Hyperon Resonance

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概要

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• A dispersion theoretical technique, suggested by Feldman, Matthews and Salam, is used to derive the static equations for a pion-hyperon scattering. The general treatment for the system with three channels, i. e. the π-Λ,π-Σ and K^^--N channels, is presented. The resonance energy, the half width and the branching ratio of the Y_<1^*> decay are calculated. Although there are some ambiguities due to both the cutoff energy and the relative magnitude of various coupling constants, it is concluded that the inclusion of the K^^--N channel does change the conclusions which are obtained on the assumption with no K^^--N channel. If we assume the parities of strange particles as P_<KYN>=-1 and P_<ΣΛ>=+1 there can, in principle, be a resonance state for any of the I=0, 1, and 2 states. For example, even if the global symmetry (f_<N^2>=f_<Λ^2>=f_<Σ^2>) is assumed, there is a Y_<1^*> resonance with J=1/2 and l=1, as a result of the inclusion of the K^^--N channel.

• 理論物理学刊行会の論文
• 1962-03-25

著者

• Matsuzaki Yoshio

  Department Of Physics Tokyo Metropolitan University

関連論文

• Pion-Hyperon Resonance

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