Search for Heavy Majorana Neutrinos in μ[superscript ±]μ[superscript ±] + just and e[superscript ±]e[superscript ±] + jets events in pp collisions at √s = 7 TeV
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Chatrchyan-2012-Search for heavy Maj.pdf
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Author(s)
Apyan, Aram
Bendavid, Joshua L.
Busza, Wit
Butz, Erik M.
Cali, Ivan Amos
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Hahn, Kristian Allan
Kim, Y.
Klute, Markus
Date Issued
September 2012
Journal
Physics Letters B
Publisher
Elsevier
Citation
Chatrchyan, S., V. Khachatryan, A.M. Sirunyan, A. Tumasyan, W. Adam, E. Aguilo, T. Bergauer, et al. “Search for Heavy Majorana Neutrinos in μ[superscript ±]μ[superscript ±] + just and e[superscript ±]e[superscript ±] + jets events in pp collisions at √s = 7 TeV.” Physics Letters B 717, no. 1–3 (October 2012): 109–128. © 2012 CERN
Version
Final published version
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[superscript −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, |V[subscript ℓN]|[superscript 2], for ℓ=e,μ, as a function of heavy Majorana-neutrino mass. These are the first direct upper limits on the heavy Majorana-neutrino mixing for m[subscript N] > 90 GeV.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. School of Science
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DOI of Published Version
https://doi.org/10.1016/j.physletb.2012.09.012
