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Search for heavy Majorana neutrinos in mu+mu+[mu-mu-]+jets and e+e+[e-e-]+jets events in pp collisions at sqrt(s) = 7 TeV

(CMS Collaboration) Godinović, Nikola; Chatrchyan, S.; Lelas, Damir; Pleština, Roko; Polić, Dunja; Puljak, Ivica; Antunović, Željko; Kovač, Marko; Brigljević, Vuko; Đurić, Senka; Kadija, Krešo; Luetić, Jelena; Mekterović, Darko; Morović, Srećko; Swanson, J. (2012) Search for heavy Majorana neutrinos in mu+mu+[mu-mu-]+jets and e+e+[e-e-]+jets events in pp collisions at sqrt(s) = 7 TeV. Physics Letters B, 717 (1/3). pp. 109-128. ISSN 0370-2693

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Abstract

A search is performed for heavy Majorana neutrinos (N) using an event signature defined by two same-sign charged leptons of the same flavour and two jets. The data correspond to an integrated luminosity of 4.98 inverse femtobarns of pp collisions at a centre-of-mass energy of 7 TeV collected with the CMS detector at the Large Hadron Collider. No excess of events is observed beyond the expected standard model background and therefore upper limits are set on the square of the mixing parameter, abs(V[ell N]) squared, for ell = e, mu, as a function of heavy Majorana-neutrino mass. These are the first direct upper limits on the heavy Majorana-neutrino mixing for m[N] > 90 GeV.

Item Type: Article
Uncontrolled Keywords: CMS; physics; heavy neutrino
Subjects: NATURAL SCIENCES > Physics
Divisions: Division of Experimental Physics
Projects:
Project titleProject leaderProject codeProject type
Experimental physics at LHC energies (Eksperimentalna fizika na LHC energijama)Krešo Kadija098-0982887-2878MZOS
Search for the Higgs boson and new physics with the CMS detector (Potraga za Higgsovim bozonom i novom fizikom detektorom CMS)Ivica Puljak023-0982887-3064MZOS
Depositing User: Krešo Kadija
Date Deposited: 03 May 2016 14:14
Last Modified: 03 May 2016 14:14
URI: http://fulir.irb.hr/id/eprint/2775
DOI: 10.1016/j.physletb.2012.09.012

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