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Search for heavy neutral lepton production in K+ decays to positrons

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dc.contributor.authorGil, E. C.
dc.contributor.authorKleimenova, A.
dc.contributor.authorMinucci, E.
dc.contributor.authorPadolski, S.
dc.contributor.authorKudenko, Y.
dc.contributor.authorКуденко, Юрий Григорьевич
dc.date.accessioned2024-11-27T08:42:39Z
dc.date.available2024-11-27T08:42:39Z
dc.date.issued2020
dc.description.abstractA search for heavy neutral lepton (N) production in K+ -> e(+)N decays using the data sample collected by the NA62 experiment at CERN in 2017-2018 is reported. Upper limits of the extended neutrino mixing matrix element vertical bar U-e4 vertical bar(2) are established at the level of 10(-9) over most of the accessible heavy neutral lepton mass range 144-462 MeV/c(2), with the assumption that the lifetime exceeds 50 ns. These limits improve significantly upon those of previous production and decay searches. The vertical bar U-e4 vertical bar(2) range favoured by Big Bang Nucleosynthesis is excluded up to a mass of about 340 MeV/c(2). (C) 2020 The Author(s). Published by Elsevier B.V.
dc.identifier.citationSearch for heavy neutral lepton production in K+ decays to positrons / Gil, EC [et al.] // Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. - 2020. - 807. - 10.1016/j.physletb.2020.135599
dc.identifier.doi10.1016/j.physletb.2020.135599
dc.identifier.urihttps://www.doi.org/10.1016/j.physletb.2020.135599
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85087480211&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000571765700067
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/22447
dc.relation.ispartofPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
dc.titleSearch for heavy neutral lepton production in K+ decays to positrons
dc.typeArticle
dspace.entity.typePublication
oaire.citation.volume807
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