Abstract
In an experiment performed at the CERN-SPS charged hyperon beam, we have observed the radiative decay Λ→nγ, using well identified Λ from the decays of Ο− of 116 GeV/c momentum. Neutrons and photons from the Λ decays were observed in liquid argon and lead glass detectors. From a sample of 31 candidates, containing an estimated background of 7.3 events, the decay branching ratio was measured to be Γ(Λ→nγ)/Γ(Λ→all)=(1.02±0.33)×10−3.
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Work supported in part by the UK Science and Engineering Research Council, the Swiss National Foundation for Scientific Research and the Bundesministerium für Forschung und Technologie, Federal Republic of Germany
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Biagi, S.F., Bourquin, M., Brown, R.M. et al. First measurement of the Λ→nγ branching ratio. Z. Phys. C - Particles and Fields 30, 201–211 (1986). https://doi.org/10.1007/BF01575427
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DOI: https://doi.org/10.1007/BF01575427