CMS Collaboration, Adair, A., Akgun, B., et al.. "Search for heavy neutrinos and W bosons with right-handed couplings in proton–proton collisions at √s=8TeV." The European Physical Journal C, 74, no. 3149 (2014) http://dx.doi.org/10.1140/epjc/s10052-014-3149-z.
A search for heavy, right-handed neutrinos, Nℓ (ℓ=e,μ), and right-handed WR bosons, which arise in the left-right symmetric extensions of the standard model, has been performed by the CMS experiment. The search was based on a sample of two lepton plus two jet events collected in proton–proton collisions at a center-of-mass energy of 8TeV corresponding to an integrated luminosity of 19.7 fb−1. For models with strict left-right symmetry, and assuming only one Nℓ flavor contributes significantly to the WR decay width, the region in the two-dimensional (MWR,MNℓ) mass plane excluded at a 95 % confidence level extends to approximately MWR=3.0TeV and covers a large range of neutrino masses below the WR boson mass, depending on the value of MWR. This search significantly extends the (MWR,MNℓ) exclusion region beyond previous results.
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