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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 |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 .
Original language | English |
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Pages (from-to) | 137-145 |
Journal | Physics Letters B |
Volume | 778 |
DOIs | |
Publication status | Published - 10 Mar 2018 |
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Dive into the research topics of 'Search for heavy neutral lepton production in K+ decays'. Together they form a unique fingerprint.Projects
- 1 Finished
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NA62 Common Fund
Lazzeroni, C. (Principal Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
6/02/13 → 5/02/16
Project: Research Councils