Lifetimes of Hypernuclei, ${}_{Λ}H^{3}$ , ${}_{Λ}H^{4}$ , ${}_{Λ}H^{5}$

Presented in this report are lifetime estimates for hypernuclei

{}_{Λ}H^{3}

{}_{Λ}H^{4}

, and

{}_{Λ}H^{5}

based upon data obtained from an emulsion stack exposed to 2.3- and 2.5-BeV/c

K^{-}

mesons. These lifetimes are:

τ ({}_{Λ}H^{3}) = ({0.9}_{- 0.4}^{+ 2.2}) \times 10^{- 10}

sec (3 in-flight and one at-rest decays;

{}_{Λ}H^{3} \to {He}^{3} + π^{-}

);

τ ({}_{Λ}H^{4}) = ({1.8}_{- 0.7}^{+ 2.5}) \times 10^{- 10}

sec (3 in-flight and 4 at-rest decays;

{}_{Λ}H^{4} \to {He}^{4} + π^{-}

);

τ ({}_{Λ}{He}^{5}) = ({1.4}_{- 0.5}^{+ 1.9}) \times 10^{- 10}

sec (3 in-flight and 25 at-rest decays;

{}_{Λ}{He}^{5} \to {He}^{4} + p + π^{-}

). Also one decay in flight and nine decays at rest of

{}_{Λ}{He}^{4} \to {He}^{3} + p + π^{-}

were observed in a total estimated time of 1.50×

10^{- 10}

sec. Included in the observation times for

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Lifetimes of Hypernuclei,H3Λ,H4Λ,H5Λ