Publication
Title
Search for heavy Majorana neutrinos in + jets and +jetsevents in proton-proton collisions at =8 TeV
Author
Institution/Organisation
CMS Collaboration
Abstract
A search is performed for heavy Majorana neutrinos (N) decaying into a W boson and a lepton using the CMS detector at the Large Hadron Collider. A signature of two jets and either two same sign electrons or a same sign electron-muon pair is searched for using 19.7 fb(-1) of data collected during 2012 in proton-proton collisions at a centre-of-mass energy of 8TeV. The data are found to be consistent with the expected standard model (SM) background and, in the context of a Type-1 seesaw mechanism, upper limits are set on the cross section times branching fraction for production of heavy Majorana neutrinos in the mass range between 40 and 500 GeV. The results are additionally interpreted as limits on the mixing between the heavy Majorana neutrinos and the SM neutrinos. In the mass range considered, the upper limits range between 0.00015{0.72 for |V-eN|(2) and 6.6 x 10(-5) -0.47 for |VeNV*(mu N)|(2) / (|V-eN|(2) + |V-mu N|(2)), where V-lN is the mixing element describing the mixing of the heavy neutrino with the SM neutrino of favour l. These limits are the most restrictive direct limits for heavy Majorana neutrino masses above 200 GeV.
Language
English
Source (journal)
Journal of high energy physics. - Bristol
Publication
Bristol : 2016
ISSN
1126-6708
1029-8479 [online]
Volume/pages
4 (2016) , 43 p.
Article Reference
169
ISI
000408573200001
Medium
E-only publicatie
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 02.08.2018
Last edited 20.09.2021
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