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Report number arXiv:2211.04818 ; CERN-EP-2022-243
Title A search for the K+μνe+e+ decay
Related titleA search for the K+ → μ−νe+e+ decay
Author(s) NA62 Collaboration  Mostrar todos os 209 autores
Corporate author(s) The NA62 collaboration
Publication 2023-03-10
Imprint 08 Nov 2022
Number of pages 12
Note Final version, published in Physics Letters B
Published in: Phys. Lett. B 838 (2023) 137679
DOI 10.1016/j.physletb.2023.137679
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN SPS ; NA62
Keywords flavor physics ; rare decay ; conservation law tests ; experimental results ; Lepton number violation ; Lepton flavour violation ; kaon decay
Abstract A search for the K+μνe+e+ decay forbidden within the Standard Model by either lepton number or lepton flavour conservation depending on the flavour of the emitted neutrino, has been performed using the dataset collected by the NA62 experiment at CERN in 2016–2018. An upper limit of 8.1×1011 is obtained for the decay branching fraction at 90% CL, improving by a factor of 250 over the previous search.
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Copyright/License Publication: © 2023-2025 The Author(s) (License: CC BY 4.0), sponsored by SCOAP³
Preprint: © 2022-2025 CERN (License: CC-BY-4.0)
Submitted by brigitte.bloch-devaux@cern.ch



 


 Record created 2022-08-20, last modified 2024-12-06


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