The lifetime of the Lambda hyperon bound in hypernuclei produced by p+U collisions
P. Kulessa, W. Cassing, L. Jarczyk, B. Kamys, H. Ohm, K. Pysz, Z. Rudy, H. Stroeher
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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