Search for heavy neutral lepton production in K+ decays

Evgueni Goudzovski

doi:10.1016/j.physletb.2018.01.031

Search for heavy neutral lepton production in K+ decays

Evgueni Goudzovski

Physics and Astronomy

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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
Pages (from-to)	137-145
Journal	Physics Letters B
Volume	778
DOIs	https://doi.org/10.1016/j.physletb.2018.01.031
Publication status	Published - 10 Mar 2018

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NA62_Collab_Search_for_heavy_neutral_lepton_Physics_Letters_B
Checked for eligibility: 23/03/2018 https://doi.org/10.1016/j.physletb.2018.01.031
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NA62 Common Fund
Lazzeroni, C. (Principal Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
6/02/13 → 5/02/16
Project: Research Councils

Cite this

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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 .",

author = "Evgueni Goudzovski",

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AB - 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 .

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DO - 10.1016/j.physletb.2018.01.031

M3 - Article

SN - 0370-2693

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EP - 145

JO - Physics Letters B

JF - Physics Letters B

ER -

Search for heavy neutral lepton production in K+ decays

Abstract

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