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Title
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Search for heavy Majorana neutrinos in same-sign dilepton channels in proton-proton collisions at = 13 TeV
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Author
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Institution/Organisation
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The CMS collaboration
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Abstract
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| A search is performed for a heavy Majorana neutrino (N), produced in leptonic decay of a W boson propagator and decaying into a W boson and a lepton, with the CMS detector at the LHC. The signature used in this search consists of two same-sign leptons, in any flavor combination of electrons and muons, and at least one jet. The data were collected during 2016 in proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb(-1). The results are found to be consistent with the expected standard model background. Upper limits are set in the mass range between 20 and 1600 GeV in the context of a Type-I seesaw mechanism, on |V-eN|(2), |V-N|(2), and |VeNV *|(2)/(|V-eN|(2)+|V-N|(2)), where V-N is the matrix element describing the mixing of N with the standard model neutrino of flavor = e, . For N masses between 20 and 1600 GeV, the upper limits on |V-N|(2) range between 2.3 x 10(-5) and unity. These are the most restrictive direct limits for heavy Majorana neutrino masses above 430 GeV. |
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Language
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English
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Source (journal)
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Journal of high energy physics. - Bristol
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Publication
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Bristol
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2019
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ISSN
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1126-6708
1029-8479
[online]
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DOI
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10.1007/JHEP01(2019)122
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Volume/pages
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1
(2019)
, 55 p.
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Article Reference
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122
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ISI
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000456243300001
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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