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Abstract: 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 |VµN|2 as a function of Majorana neutrino mass mN for masses in the range of 40–500 GeV, where VµN is the mixing element of the heavy neutrino with the standard model muon neutrino. The limits obtained are |VµN|2<0.00470 for mN=90 GeV, |VµN|2<0.0123 for mN=200 GeV, and |VµN|2<0.583 for mN=500 GeV. These results extend considerably the regions excluded by previous direct searches.
Fuente: Physics Letters B, Vol. 748, Pp. 144–166, 2015
Publisher: Elsevier
Publication date: 01/09/2015
No. of pages: 23
Publication type: Article
DOI: 10.1016/j.physletb.2015.06.070
ISSN: 0370-2693,1873-2445
Spanish project: FPA2014-55295-C3-1-R ; FPA 2011-28694-C02-01
Publication Url: https://doi.org/10.1016/j.physletb.2015.06.070
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KHACHATRYAN, VLADIMIR
JAVIER ANDRES BROCHERO CIFUENTES
JOSE IBAN CABRILLO BARTOLOME
ALICIA CALDERON TAZON
JORGE DUARTE CAMPDERROS
MARCOS FERNANDEZ GARCIA
GERVASIO GOMEZ GRAMUGLIO
ALBERTO GRAZIANO
MARIA AMPARO LOPEZ VIRTO
JESUS MARCO DE LUCAS
RAFAEL JOSE MARCO DE LUCAS
CELSO MARTINEZ RIVERO
FRANCISCO MATORRAS WEINIG
FRANCISCA JAVIELA MUÑOZ SANCHEZ
JONATAN PIEDRA GOMEZ
MARIA TERESA RODRIGO ANORO
ANA YAIZA RODRIGUEZ MARRERO
ALBERTO RUIZ JIMENO
LUCA SCODELLARO
IVAN VILA ALVAREZ
ROCIO VILAR CORTABITARTE
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