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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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 |
|---|---|
| Publication: | JOURNAL OF HIGH ENERGY PHYSICS |
| Publisher: | SPRINGER |
| Additional Information: | Copyright of this article belongs to SPRINGER |
| Department/Centre: | Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering) |
| 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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