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Nonmesonic decay of the Lambda hyperon in nuclear matter - implications on the weak Lambda-N interaction | | W. Cassing
; L. Jarczyk
; B.Kamys
; P. Kulessa
; H.Ohm
; K. Pysz
; Z. Rudy
; O.W.B. Schult
; H. Stroeher
; | | Date: |
17 Sep 2001 | | Journal: | Eur.Phys.J. A16 (2003) 549-561 | | Subject: | nucl-ex | | Affiliation: | 3,4), H.Ohm , K. Pysz (3,4), Z. Rudy (2,3), O.W.B. Schult , H. Stroeher ( Institut fuer Theoretische Physik, Justus Liebig Universitaet Giessen M. Smoluchowski Institute of Physics, Jagellonian University Institut fuer Kernphysik, Forschungszentrum | | Abstract: | The lifetime of the Lambda hyperon in heavy hypernuclei as measured by the COSY-13 Collaboration in proton - Au, Bi and U collisions has been analysed to yield tau(Lambda) = (145 +- 11) ps. This value for tau(Lambda) is compatible with the lifetime extracted from antiproton annihilation on Bi and U targets, however, much more accurate. We find that the dependence of the lifetime tau(Lambda) on the mass of hypernuclei indicates a violation of the phenomenological Delta I = 1/2 rule known from the weak mesonic decays of strange particles. PACS: {13.30.-a}{Decays of baryons} {13.75.Ev}{Hyperon-nucleon interaction} {21.80}{Hypernuclei} {25.80.Pw}{Hyperon-induced reactions} | | Source: | arXiv, nucl-ex/0109012 | | Services: | Forum | Review | PDF | Favorites | |
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