Analysis of Hyperon Nonleptonic Decay Amplitudes

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概要

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• Hyperon nonleptonic decay amplitudes are analyzed including relative phases and signs under the assumption of CP-invariance. Magnitudes of S- and P-wave amplitudes and their relative phases are evaluated, by taking account of the final state interactions. In Λ- and Ξ decays, the ΔI=1/2 rule holds in good accuracy. The relative sign of the amplitude Λ→nπ^0 to Λ→pπ^- is likely to be minus than plus, and the P-wave amplitudes of Σ^+→nπ^+ and Σ^+→pπ^0 seem to be of equal sign. Both are consistent with the signs predicted by the ΔI=1/2 rule. In Σ^+-decay, the large phase shift difference between the I=1/2 and 3/2 S-wave states leads to |S(Σ_+^+)/SΣ_0^+)|-^^>0.16, and it is found that S(Σ_+^+) is mainly imaginary. No evidence of large violation of CP is found in any processes.

• 理論物理学刊行会の論文
• 1970-10-25

著者

• TAKAHASHI Junji

  Department of Physics, Osaka University

• Takahashi Junji

  Department Of Physics Osaka University

関連論文

• Current Algebra and Form Factors of the Axial-Vector Current
• Partial Wave Amplitudes of the Reaction π^-+p→η+n
• Analysis of Hyperon Nonleptonic Decay Amplitudes

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