The lifetime of the Lambda hyperon bound in hypernuclei produced by p+U collisions
Abstract
The nonmesonic decay of the Lambda hyperon has been investigated by observation of delayed fission from heavy hypernuclei produced in proton-U collisions at Tp = 1.9 GeV. The lifetime of heavy hypernuclei with masses A approximately 220 obtained in the present work, i.e. tau = 138 +- 6 (stat.) +-m 17 (syst.) ps, is the most accurate result for heavy hypernuclei produced in proton and antiproton induced collisions on a U target so far. PACS: 13.30.-aDecays of baryons 13.75.EvHyperon-nucleon interaction 21.80Hypernuclei 25.80.PwHyperon-induced reactions
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