Searches for lepton number violating K^+ decays
(2019) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. 797, p. 134794 (2019)
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- Abstract
- The NA62 experiment at CERN reports a search for the lepton number violating decays K+→π−e+e+ and K+→π−μ+μ+ using a data sample collected in 2017. No signals are observed, and upper limits on the branching fractions of these decays of 2.2×10−10 and 4.2×10−11 are obtained, respectively, at 90% confidence level. These upper limits improve on previously reported measurements by factors of 3 and 2, respectively.
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Cortina Gil, E., Kleimenova, A., Lurkin, N., & et al. (2019). Searches for lepton number violating K^+ decays. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, 797, 134794. https://doi.org/10.1016/j.physletb.2019.07.041 (Original work published 2019)