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Prog. Theor. Phys. Vol. 16 No. 3 (1956) pp. 177-188

Note on the Decay Interactions of Hyperons and Heavy Mesons

Chikashi Iso and Masaaki Kawaguchi^*

Physics Department, Tokyo University of Education, Tokyo
^*Research Institute for Fundamental Physics, Kyoto University, Kyoto

(Received May 12, 1956)

Abstract:

The decay processes are investigated based on Nishijima and Gell-Mann's charge independence theory of heavy unstable particles. We assume that the decay interaction Hamiltonian is a spinor in isotopic spin space, when all particles participating in a decay process have definite isotopic spins. The branching ratio of various decay modes including radiative decays and the relation of lifetimes among charge multiplets are obtained. For instance, the difference between lifetimes of θ⁰ and of θ⁺, and the branching ratio of the τ⁺ particle are well interpreted under our assumption. Our theory is also applied to the decay of the lightest hyperfragment ³H_Λ.

URL : http://ptp.ipap.jp/link?PTP/16/177/
DOI : 10.1143/PTP.16.177

[ Full Text PDF : FREE ACCESS (865K) ] Citation: Plain Text BiBTeX EndNote(RIS) RSS

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References:

1. M. Kawaguchi and K. Nishijima, Prog. Theor. Phys. 15 (1956), 180[PTP].
2. T. Nakano and K. Nishijima, Prog. Theor. Phys. 10 (1953), 581[PTP].
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5. M. Gell-Mann, Phys. Rev. 92 (1953), 833[APS].
6. M. Gell-Mann and A. Pais, Proceedings of 1954 Glasgow Conference, p. 342.
7. M. Kawaguchi and K. Nishijima, Prog. Theor. Phys. 15 (1956), 182[PTP].
8. G. Takeda, Phys. Rev. 101 (1956), 1547[APS].
   Most of the results of §2 have been obtained by G. Takeda in his parallel work.
9. M. Kawaguchi and S. Minami, Prog. Theor. Phys. 12 (1954), 789[PTP].
10. F. de Hoffmann et al., Phys. Rev. 95 (1954), 1586[APS].
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12. R. H. Dalitz, Proc. Phys. Soc. A 66 (1953), 710.
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Citing Article(s) :

1. Progress of Theoretical Physics Vol. 17 No. 3 (1957) pp. 313-325 :

   An Attempt of Generalizing the Hypothesis of Charge Independence, I

   Osamu Hara and Yasunori Fujii

2. Progress of Theoretical Physics Vol. 17 No. 6 (1957) pp. 743-750 :

   Selection Rule Imposed by Mass Reversal

   Tadashi Ouchi

3. Progress of Theoretical Physics Vol. 18 No. 1 (1957) pp. 39-50 :

   Parity Nonconservation and Decay of Hyperon

   Shigeo Minami and Yoshio Yamaguchi

4. Progress of Theoretical Physics Vol. 19 No. 5 (1958) pp. 485-494 :

   Phenomenological Analysis of the Decay Processes of the Σ- and Λ-Hyperons

   Yoshio Yamaguchi

5. Progress of Theoretical Physics Vol. 20 No. 4 (1958) pp. 457-475 :

   Possible Experimental Tests on the Decay Interactions of Hyperons

   Kiyomi Itabashi

6. Progress of Theoretical Physics Vol. 24 No. 1 (1960) pp. 97-110 :

   Composite Model and the Nature of Vector Interactions in Strangeness-Violating Decays

   Chikashi Iso, Masaaki Kawaguchi and Yoneji Miyamoto

7. Progress of Theoretical Physics Vol. 26 No. 4 (1961) pp. 505-518 :

   On a Radiative Decay of Σ⁺

   Makoto Sawamura

8. Progress of Theoretical Physics Vol. 37 No. 5 (1967) pp. 870-880 :

   Nonleptonic Sigma Decays

   S. R. Deans, W. G. Holladay and R. E. Mickens

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