Weak radiative decay of the + and λ hyperons

Glennys R. Farrar

    Research output: Contribution to journalArticle

    Abstract

    Unitarity is found to give a reliable, model-independent lower bound on the branching ratio [rate(Λ→nγ)rate(Λ→all)]>8. 5×10-4. This value is nearly as large as the experimentally determined branching ratio for the decay +→pγ. Dispersion-theoretic techniques supplemented with current algebra, PCAC, and pole models are then used to determine the real as well as imaginary parts of the amplitudes for the radiative decays of the Λ and + hyperons. Input consists of the experimental nonleptonic decay amplitudes and pion-nucleon phase shifts. The theoretical predictions are very sensitive to the hyperon magnetic moments, and until these are better known, these results for the radiative decays can only be qualitatively compared with experiment.

    Original languageEnglish (US)
    Pages (from-to)212-220
    Number of pages9
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume4
    Issue number1
    DOIs
    StatePublished - 1971

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    hyperons
    decay
    current algebra
    pions
    phase shift
    poles
    magnetic moments
    predictions

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

    Cite this

    Weak radiative decay of the + and λ hyperons. / Farrar, Glennys R.

    In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 4, No. 1, 1971, p. 212-220.

    Research output: Contribution to journalArticle

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