abstract

• Searches for heavy neutral leptons N in the K%2b → e%2bN and K%2b → μ%2bN decay channels using the dataset collected by the NA62 experiment at CERN between 2016-2018 are presented. Upper limits on the corresponding mixing matrix elements are reported at the level of O(10−9) and O(10−8), respectively. This represents an improvement of at least an order of magnitude on previous measurement, as well as an extension to higher masses than previously covered. Related searches set upper limits on the rate of the K%2b → μ%2bνν(Equation presented) and K%2b → μ%2bνX decay channels, with X an invisible scalar or vector boson. © Copyright owned by the author(s) under the terms of the Creative Commons

authors

• Engelfried Jatzkowski Jurgen
• The NA62 Collaboration

publication date

• 2022-01-01

published in

• Proceedings of Science  Proceedings

keywords

• Decay channels; Matrix elements; Mixing matrix; Orders of magnitude; Upper limits; Vector boson

Digital Object Identifier (DOI)

PubMed ID

start page

end page

volume

• 402

issue