First search for K%2b→π%2bνν¯ using the decay-in-flight technique Article uri icon

abstract

  • The NA62 experiment at the CERN SPS reports the first search for K%2b→π%2bνν¯ using the decay-in-flight technique, based on a sample of 1.21×1011 K%2b decays collected in 2016. The single event sensitivity is 3.15×10−10, corresponding to 0.267 Standard Model events. One signal candidate is observed while the expected background is 0.152 events. This leads to an upper limit of 14×10−10 on the K%2b→π%2bνν¯ branching ratio at 95%25 CL. © 2019 The Author

authors

publication date

  • 2019-01-01

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