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Search for heavy Majorana neutrinos in same-sign dilepton channels in proton-proton collisions at s√=13 TeV (CROSBI ID 267111)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

(CMS Collaboration) Sirunyan, Albert ; ... ; Đurić, Senka ; Lelas, Damir ; Godinović, Nikola ; Puljak, Ivica ; Šćulac, Toni ; Mesić, Benjamin ; Šuša, Tatjana ; Kovač, Marko et al. Search for heavy Majorana neutrinos in same-sign dilepton channels in proton-proton collisions at s√=13 TeV // The Journal of high energy physics, 01 (2019), 122, 55. doi: 10.1007/JHEP01(2019)122

Podaci o odgovornosti

Sirunyan, Albert ; ... ; Đurić, Senka ; Lelas, Damir ; Godinović, Nikola ; Puljak, Ivica ; Šćulac, Toni ; Mesić, Benjamin ; Šuša, Tatjana ; Kovač, Marko ; Ferenček, Dinko ; Antunović, Željko ; Starodumov, Andrey ; Brigljević, Vuko ; Luetić, Jelena ; Kadija, Krešo ; ... ; Woods, Nate

CMS Collaboration

engleski

Search for heavy Majorana neutrinos in same-sign dilepton channels in proton-proton collisions at s√=13 TeV

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 |VeN|2, |VμN|2, and |VeNV μN * |2/(|VeN|2 + |VμN|2), where VℓN is the matrix element describing the mixing of N with the standard model neutrino of flavor ℓ = e, μ. For N masses between 20 and 1600 GeV, the upper limits on |VℓN|2 range between 2.3 × 10−5 and unity. These are the most restrictive direct limits for heavy Majorana neutrino masses above 430 GeV.

high energy physics ; experimental particle physics ; LHC ; CMS ; standard model

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Podaci o izdanju

01

2019.

122

55

objavljeno

1126-6708

1029-8479

10.1007/JHEP01(2019)122

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Fizika

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