Searches for lepton number violating K+ decays have been performed using the complete dataset collected by the NA62 experiment at CERN in 2016–2018. Upper limits of 5.3 10^-11 and 8.5 10^-10 are obtained on the decay branching fractions at 90% confidence level. The former result improves by a factor of four over the previous best limit, while the latter result represents the first limit on the decay rate k+ > pi- pi0 e+ e+.
Searches for lepton number violating K+ → π−(π0)e+e+ decays
Dalpiaz, P.;Fiorini, M.;Neri, I.;Norton, A.;Petrucci, F.;Wahl, H.;Cotta Ramusino, A.;Gianoli, A.;
2022
Abstract
Searches for lepton number violating K+ decays have been performed using the complete dataset collected by the NA62 experiment at CERN in 2016–2018. Upper limits of 5.3 10^-11 and 8.5 10^-10 are obtained on the decay branching fractions at 90% confidence level. The former result improves by a factor of four over the previous best limit, while the latter result represents the first limit on the decay rate k+ > pi- pi0 e+ e+.File in questo prodotto:
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