Hypernuclear constraints on the existence and lifetime of a deeply bound H dibaryon

We study to what extent the unique observation of ΛΛ hypernuclei by their weak decay into known Λ hypernuclei, with lifetimes of order 10−10 s, rules out the existence of a deeply bound doubly-strange (S = − 2) H dibaryon. Treating ΛΛ6He (the Nagara emulsion event) in a realistic Λ−Λ−4He three-body...

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Bibliographic Details
Published in:Physics letters. B 2024-10, Vol.857, p.138973, Article 138973
Main Author: Gal, Avraham
Format: Article
Language:English
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Summary:We study to what extent the unique observation of ΛΛ hypernuclei by their weak decay into known Λ hypernuclei, with lifetimes of order 10−10 s, rules out the existence of a deeply bound doubly-strange (S = − 2) H dibaryon. Treating ΛΛ6He (the Nagara emulsion event) in a realistic Λ−Λ−4He three-body model, we find that the HeΛΛ6→H+4He strong-interaction lifetime increases beyond 10−10 s for mH
ISSN:0370-2693
DOI:10.1016/j.physletb.2024.138973