Search for heavy neutral lepton production in <i>K</i><SUP>+</SUP> decays



Gil, E Cortina, Minucci, E, Padolski, S, Petrov, P, Velghe, B, Georgiev, G, Kozhuharov, V, Litov, L, Numao, T, Bryman, D
et al (show 179 more authors) (2018) Search for heavy neutral lepton production in <i>K</i><SUP>+</SUP> decays. PHYSICS LETTERS B, 778. pp. 137-145.

[img] Text
1-s2.0-S037026931830039X-main.pdf - Published version

Download (525kB)

Abstract

A search for heavy neutral lepton production in K+ decays using a data sample collected with a minimum bias trigger by the NA62 experiment at CERN in 2015 is reported. Upper limits at the 10−7 to 10−6 level are established on the elements of the extended neutrino mixing matrix |Ue4|2 and |Uμ4|2 for heavy neutral lepton mass in the ranges 170–448 MeV/c2 and 250–373 MeV/c2, respectively. This improves on the previous limits from HNL production searches over the whole mass range considered for |Ue4|2, and above 300 MeV/c2 for |Uμ4|2.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 23 Apr 2018 07:34
Last Modified: 13 Oct 2023 16:08
DOI: 10.1016/j.physletb.2018.01.031
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3020501