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.

Searches for lepton number violating K+ decays

Arcidiacono R.;Boretto M.;Menichetti E.;Migliore E.;Soldi D.;
2019-01-01

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.
2019
797
134794
134802
http://www.sciencedirect.com/science/journal/03702693
Cortina Gil E.; Kleimenova A.; Minucci E.; Padolski S.; Petrov P.; Shaikhiev A.; Volpe R.; Numao T.; Petrov Y.; Velghe B.; Bryman D.; Fu J.; Husek T.;...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1731764
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