Searches for lepton number violating K+ -> pi- e+ e+ and K+ -> pi- pi0 e+ e+ decays have been performed using the complete dataset collected by the NA62 experiment at CERN in 2016-2018. Upper limits of 5.3 x 10^(-11 )and 8.5 x 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 K+ -> pi- pi0 e+ e+ decay rate.

Searches for lepton number violating K+ → π− (π0) e+ e+ decays

R. Arcidiacono;M. Boretto;E. Menichetti;E. Migliore;D. Soldi;R. Guida;
2022-01-01

Abstract

Searches for lepton number violating K+ -> pi- e+ e+ and K+ -> pi- pi0 e+ e+ decays have been performed using the complete dataset collected by the NA62 experiment at CERN in 2016-2018. Upper limits of 5.3 x 10^(-11 )and 8.5 x 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 K+ -> pi- pi0 e+ e+ decay rate.
2022
830
137172
137184
E. Cortina Gil; A. Kleimenova; E. Minucci; S. Padolski; P. Petrov; A. Shaikhiev; R. Volpe; T. Numao; Y. Petrov; B. Velghe; V.W.S. Wong; D. Bryman; J. ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1886912
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