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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CITATION STYLE
Cortina Gil, E., Kleimenova, A., Minucci, E., Padolski, S., Petrov, P., Shaikhiev, A., … Rubin, P. (2019). Searches for lepton number violating K+ decays. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 797. https://doi.org/10.1016/j.physletb.2019.07.041
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