CMS CollaborationKarapınar, Güler01. Izmir Institute of Technology2017-07-102017-07-102015-07Khachatryan, V., Sirunyan, A.M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M.,...CMS Collaboration (2015). Search for heavy Majorana neutrinos in μ±μ± + jets events in proton-proton collisions at s=8 TeV. Physics Letters, Section B, 748, 144-166. doi:10.1016/j.physletb.2015.06.0700370-2693http://doi.org/10.1016/j.physletb.2015.06.070https://hdl.handle.net/11147/5907A 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. © 2015 CERN for the benefit of the CMS Collaboration.eninfo:eu-repo/semantics/openAccessCompact Muon SolenoidLarge Hadron Collider (LHC)Majorana neutrinosArticle2-s2.0-8493703980810.1016/j.physletb.2015.06.07010.1016/j.physletb.2015.06.070