Search for a Heavy Composite Majorana Neutrino in the Final State with Two Leptons and Two Quarks at √s = 13 TeV
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Author(s)
CMS Collaboration
Abercrombie, Daniel Robert
Allen, Brandon Leigh
Azzolini, Virginia
Barbieri, Richard Alexander
Baty, Austin Alan
Bi, Ran
Brandt, Stephanie Akemi
Busza, Wit
Cali, Ivan Amos
Date Issued
November 2017
Journal
Physics Letters B
Publisher
Elsevier BV
Citation
Sirunyan, A.M. et al. “Search for a Heavy Composite Majorana Neutrino in the Final State with Two Leptons and Two Quarks at √s = 13TeV.” Physics Letters B 775 (December 2017): 315–337 © 2017 The Author(s)
Version
Final published version
Abstract
A search for physics beyond the standard model in the final state with two same-flavour leptons (electrons or muons) and two quarks produced in proton–proton collisions at √s = 13TeV is presented. The data were recorded by the CMS experiment at the CERN LHC and correspond to an integrated luminosity of 2.3fb⁻¹. The observed data are in good agreement with the standard model background prediction. The results of the measurement are interpreted in the framework of a recently proposed model in which a heavy Majorana neutrino, Nℓ, stems from a composite-fermion scenario. Exclusion limits are set for the first time on the mass of the heavy composite Majorana neutrino, mNℓ, and the compositeness scale Λ. For the case mN[subscript ℓ]=Λ, the existence of N[subscript e](N[subscript μ]) is excluded for masses up to 4.60 (4.70) TeV at 95% confidence level. Keywords: CMS; Exotica
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1016/J.PHYSLETB.2017.11.001
