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CMS-EXO-13-008 ; CERN-PH-EP-2014-161
Search for heavy neutrinos and W bosons with right-handed couplings in proton-proton collisions at $\sqrt{s}$ = 8 TeV
Eur. Phys. J. C 74 (2014) 3149
Abstract: A search for heavy, right-handed neutrinos, N$_{\ell}$ ($\ell$ = e, $\mu$), 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$^{-1}$. No significant excess of events over the standard model expectation is observed. For models with strict left-right symmetry, and assuming only one N$_{\ell}$ flavor contributes significantly to the W$_R$ 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$_R$) = 3.0 TeV 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.
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Compact Muon Solenoid
LHC, CERN