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

Sirunyan, AM (2019) Search for heavy Majorana neutrinos in same-sign dilepton channels in proton-proton collisions at root s = TeV. In: JOURNAL OF HIGH ENERGY PHYSICS .

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Official URL: https://doi.org/10.1007/JHEP01(2019)122

Abstract

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.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to SPRINGER
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Depositing User: Id for Latest eprints
Date Deposited: 15 Feb 2019 08:47
Last Modified: 15 Feb 2019 08:47
URI: http://eprints.iisc.ac.in/id/eprint/61739

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