Searches for lepton number violating K+ -> pi(-)(pi(0))e(+)e(+) decays

Gil, E Cortina, Kleimenova, A, Minucci, E, Padolski, S, Petrov, P, Shaikhiev, A, Volpe, R, Numao, T, Petrov, Y, Velghe, B
et al (show 199 more authors) (2022) Searches for lepton number violating K+ -> pi(-)(pi(0))e(+)e(+) decays. PHYSICS LETTERS B, 830. p. 137172.

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Searches for lepton number violating K+→π−e+e+ and K+→π−π0e+e+ 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 K+→π−π0e+e+ decay rate.

Item Type: Article
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 05 May 2023 09:06
Last Modified: 08 May 2023 15:15
DOI: 10.1016/j.physletb.2022.137172
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