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On the ΔI= 1/2 rule in the ΛNNN reaction

  • Z. Rudy
  • W. Cassing
  • L. Jarczyk
  • B. Kamys
  • P. Kulessa
  • O.W.B. Schult
  • A. Strzałkowski
Short notes

Abstract:

It is shown that the mass dependence of the Λ-lifetime in heavy hypernuclei is sensitive to the ratio of neutron-induced to proton-induced non-mesonic decay rates Rn/Rp. A comparison of the experimental mass dependence of the lifetimes with the calculated ones for different values of Rn/Rp leads to the conclusion that this ratio is larger than 2 on the confidence level of 0.75. This suggests that the phenomenological ΔI= 1/2 rule might be violated for the nonmesonic decay of the Λ-hyperon.

PACS: 13.30.-a Decays of baryons – 13.75.Ev Hyperon-nucleon interaction – 21.80 Hypernuclei – 25.80.Pw Hyperon-induced reactions 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • Z. Rudy
    • 1
  • W. Cassing
    • 2
  • L. Jarczyk
    • 1
  • B. Kamys
    • 1
  • P. Kulessa
    • 1
  • O.W.B. Schult
    • 3
  • A. Strzałkowski
    • 1
  1. 1.M. Smoluchowski Institute of Physics, Jagellonian University, PL–30059 Cracow, PolandPL
  2. 2.Institut für Theoretische Physik, Universität Giessen, D–35392 Giessen, GermanyDE
  3. 3.Institut für Kernphysik, Forschungszentrum Jülich, D–52425 Jülich, GermanyDE

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