Search for heavy neutral lepton production in K+ decays

, NA 62 Collaboration (2018) Search for heavy neutral lepton production in K+ decays. Physics Letters B, 778. pp. 137-145. ISSN 0370-2693

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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 | U e 4 | 2 and | U μ 4 | 2 for heavy neutral lepton mass in the ranges 170–448 MeV/ c 2 and 250–373 MeV/ c 2 , respectively. This improves on the previous limits from HNL production searches over the whole mass range considered for | U e 4 | 2 , and above 300 MeV/ c 2 for | U μ 4 | 2 .

Item Type:
Journal Article
Journal or Publication Title:
Physics Letters B
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
ID Code:
90176
Deposited By:
Deposited On:
07 Feb 2018 10:56
Refereed?:
Yes
Published?:
Published
Last Modified:
19 Jan 2021 13:15