Abstract:
A search for heavy, right-handed neutrinos,\(N_{\ell} (\ell = e, \nu)\), and right-handed \(W_R\) 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 8 TeV corresponding to an integrated luminosity of 19.7 fb⁻¹. For models with strict left-right symmetry, and assuming only one \(N_\ell\) flavor contributes significantly to the WR decay width, the region in the two-dimensional (\(M_{W_R}, M_{N_\ell}\)) mass plane excluded at a 95 % confidence level extends to approximately \(M_{W_R}\)=3.0TeV and covers a large range of neutrino masses below the \(W_R\) boson mass, depending on the value of \(M_{W_R}\). This search significantly extends the (\(M_{W_R}, M_{N_\ell}\)) exclusion region beyond previous results. Electronic supplementary material The online version of this article (doi:10.1140/epjc/s10052-014-3149-z) contains supplementary material, which is available to authorized users.
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