Title Search for heavy Majorana neutrinos in $\mu^{\pm}\mu^{\pm}$ + jets and $e^{\pm}e^{\pm}$ + jets events in pp collisions at $\sqrt{s}$ = 7 TeVSearch for heavy Majorana neutrinos in $\mu^{\pm}\mu^{\pm}$ + jets and $e^{\pm}e^{\pm}$ + jets events in pp collisions at $\sqrt{s}$ = 7 TeV Author Chatrchyan, S. Khachatryan, V. Sirunyan, A.M. Bansal, M. Bansal, S. Cornelis, T. de Wolf, E.A. Janssen, X. Luyckx, S. Mucibello, L. Roland, B. Rougny, R. Selvaggi, M. van Haevermaet, H. Van Mechelen, P. Van Remortel, N. Van Spilbeeck, A. et al. Faculty/Department Faculty of Sciences. Physics Research group Elementary Particle Physics Department of Physics Publication type article Publication 2012Amsterdam, 2012 Subject Physics Source (journal) Physics letters: B. - Amsterdam, 1967, currens Volume/pages 717(2012):1-3, p. 109-128 ISSN 0370-2693 ISI 000310187700010 Carrier E Target language English (eng) Full text (Publishers DOI) Affiliation University of Antwerp 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 fb(-1) 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, vertical bar V-lN vertical bar(2), for l = e. mu, as a function of heavy Majorana-neutrino mass. These are the first direct upper limits on the heavy Majorananeutrino mixing for m(N) > 90 GeV. (C) 2012 CERN. Published by Elsevier B.V. All rights reserved. Full text (open access) https://repository.uantwerpen.be/docman/irua/091d8c/3588.pdf E-info http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000310187700010&DestLinkType=RelatedRecords&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000310187700010&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000310187700010&DestLinkType=CitingArticles&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 Handle