Search for a heavy neutrino and right-handed W of the left-right symmetric model in pp collisions at 8 TeV

We describe the search for signals from the production of right-handed $W_R$ bosons and heavy neutrinos $N_{\ell}$ ($\ell = e, \mu$), that arise naturally in the left-right symmetric extension to the standard model, with the CMS Experiment at the LHC using the 8~TeV pp collision data collected in 2012. No excess over expectations from standard model processes is observed. For models with exact left-right symmetry, and assuming either $N_e$ or $N_{\mu}$ is the only right-handed neutrino accessible at LHC energies, we exclude the region in the two-dimensional parameter $(M_{W_R},M_{N_{\ell}})$ space that extends beyond $M_{W_R} = 2.5$~TeV. Assuming degenerate neutrino masses for all neutrino flavors, we combine the 8~TeV electron and muon channel results and obtain exclusion in the $(M_{W_R},M_{N_{\ell}})$ mass plane extending to $M_{W_R} = 2.8$~TeV. Combining 7 and 8~TeV data for the muon channel only, and assuming that only $N_{\mu}$ is light enough to be produced at the LHC, we exclude up to $M_{W_R} = 2.9$~TeV.