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Search for heavy Majorana neutrinos in μ±μ± + jets events in proton-proton collisions at s=8 TeV

Khachatryan, V.; Sirunyan, A.M.; Tumasyan, A.; Adam, W.; Bergauer, T.; Dragicevic, M.; Erö, J.; Friedl, M.; Frühwirth, R.; Ghete, V.M.; Hartl, C.; Hörmann, N.; Hrubec, J.; Jeitler, M.; Kiesenhofer, W.; Knünz, V.; Krammer, M.; Krätschmer, I.; Liko, D.; Mikulec, I.; ... mehr

A search is performed for heavy Majorana neutrinos (N) using an event signature defined by two muons of the same charge and two jets (μ±μ±jj). The data correspond to an integrated luminosity of 19.7 fb-1 of proton-proton collisions at a center-of-mass energy of 8 TeV, collected with the CMS detector at the CERN LHC. No excess of events is observed beyond the expected standard model background and upper limits are set on |V<inf>μN</inf>|2 as a function of Majorana neutrino mass m<inf>N</inf> for masses in the range of 40-500 GeV, where V<inf>μN</inf> is the mixing element of the heavy neutrino with the standard model muon neutrino. The limits obtained are |V<inf>μN</inf>|2<0.00470 for m<inf>N</inf>=90 GeV, |V<inf>μN</inf>|2<0.0123 for m<inf>N</inf>=200 GeV, and |V<inf>μN</inf>|2<0.583 for m<inf>N</inf>=500 GeV. These results extend considerably the regions excluded by previous direct searches. © 2015 CERN for the benefit of the CMS Collaboration.

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DOI: 10.5445/IR/1000051114
DOI: 10.1016/j.physletb.2015.06.070
Zitationen: 64
Web of Science
Zitationen: 69
Zugehörige Institution(en) am KIT Institut für Experimentelle Kernphysik (IEKP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2015
Sprache Englisch
Identifikator ISSN: 0370-2693
KITopen-ID: 1000051114
Erschienen in Physics Letters B
Band 748
Seiten 144-166
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Nachgewiesen in Web of Science
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