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ON THE BRANCHING RATIOS OF THE DECAYS OE THE HYPERONS AND THE RATIOS OE THE MEAN LIFE TIMES

CHEN J. M. HO T.H. SAN D. C. TZU H. Y.

ON THE BRANCHING RATIOS OF THE DECAYS OE THE HYPERONS AND THE RATIOS OE THE MEAN LIFE TIMES

CHEN, J. M., HO, T.H., SAN, D. C., TZU, H. Y.
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  • Received Date:  07 November 1958
  • Published Online:  20 February 1959

ON THE BRANCHING RATIOS OF THE DECAYS OE THE HYPERONS AND THE RATIOS OE THE MEAN LIFE TIMES

  • 1. 中国科学院原子能研究所

Abstract: The branching ratios of the decay of the hyperons, the ratios of the mean life times of the decay of various hyperons and the ratios of the life times of the hyperons to that of the K+-meson are calculated by using the universal Ferm weak interaction proposed by Feynman and Gell-Mann and the strong interaction proposed by Salam. The perturbation theory is used with a cut off in the region of large momentum. By using the coupling constants of the strong interaction given by Warner and choosing suitable values for the other two coupling constants remaing to be fixed most of the results of our calculation agree fairly well with the experiments. The worst result differs from the experimental Values at most bya facto of 2. The theoretical values of the branching ratios of K+-decay is derivedfrom this set of new coupling constants shown better agreement with the experiment than the results obtained in the previous paper.Our, calculation shows that the universal Fermi weak interaction of V-A type gives quite satisfactory explanation of the decay phenomena of K-mesons and the hyperons. It is also evident from our calculation, that these decays must be regarded as phenomena brought about by the joint action of the strong and weak interactions and that there exist two classes of strong interactions: the "very strong" one and the "medium strong" one. Our results favour the assumption that the ∧ and ∑ have the same parity. It also shows, that of the 4 terms of the strong interaction Hamiltonian given by Salam involving the K-meson at least two terma involve γ5 matrix.

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