Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/6208
Title: Search for heavy Majorana neutrinos in e±e±+ jets and e±µ±+ jets events in proton-proton collisions at ?s = 8 TeV
Authors: CMS Collaboration
Karapınar, Güler
Keywords: Large Hadron Collider (LHC)
Compact Muon Solenoid
Heavy Majorana neutrinos
Issue Date: Apr-2016
Publisher: Springer Verlag
Source: Khachatryan, V., Sirunyan, A.M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T.,...CMS Collaboration (2016). Search for heavy Majorana neutrinos in e±e±+ jets and e±µ±+ jets events in proton-proton collisions at √s = 8 TeV. Journal of High Energy Physics, 2016(4). doi:10.1007/JHEP04(2016)169
Abstract: A search is performed for heavy Majorana neutrinos (N) decaying into a W boson and a lepton using the CMS detector at the Large Hadron Collider. A signature of two jets and either two same sign electrons or a same sign electron-muon pair is searched for using 19.7 fb-1 of data collected during 2012 in proton-proton collisions at a centre-of-mass energy of 8TeV. The data are found to be consistent with the expected standard model (SM) background and, in the context of a Type-1 seesaw mechanism, upper limits are set on the cross section times branching fraction for production of heavy Majorana neutrinos in the mass range between 40 and 500 GeV. The results are additionally interpreted as limits on the mixing between the heavy Majorana neutrinos and the SM neutrinos. In the mass range considered, the upper limits range between 0.00015-0.72 for |VeN|2 and 6.6×10-5-0.47 for |VeNV * µN|2/(|VeN|2+|VµN|2), where V ℓN is the mixing element describing the mixing of the heavy neutrino with the SM neutrino of flavour ℓ. These limits are the most restrictive direct limits for heavy Majorana neutrino masses above 200 GeV. © CERN, for the benefit of the CMS Collaboration.
URI: http://doi.org/10.1007/JHEP04(2016)169
http://hdl.handle.net/11147/6208
ISSN: 1029-8479
Appears in Collections:Mathematics / Matematik
Rectorate / Rektörlük
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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