Nuclear and nucleon transitions of the H dibaryon

Glennys R. Farrar, Gabrijela Zaharijas

    Research output: Contribution to journalArticle

    Abstract

    We consider 3 types of processes pertinent to the phenomenology of an H dibaryon: conversion of two Λ's in a doubly strange hypernucleus to an H, decay of the H to two baryons, and-if the H is light enough-conversion of two nucleons in a nucleus to an H. We compute the spatial wave function overlap using the Isgur-Karl, Miller-Spencer and Bethe-Goldstone wave functions, and treat the weak interactions phenomenologically. The observation of Λ decays from doubly strange hypernuclei puts a constraint on the H wave function which is plausibly satisfied. Imposing this constraint, we obtain model-independent lower limits on the H lifetime; if mH<m N+mΛ, the H lifetime can be of the order of or longer than the age of the Universe. We discuss limits on a long-lived or stable H, and point out how experiments can improve the constraints.

    Original languageEnglish (US)
    Article number014008
    Pages (from-to)014008-1-014008-11
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume70
    Issue number1
    DOIs
    StatePublished - Jul 2004

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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