Prospects of detecting massive isosinglet neutrino at LHC in the CMS detector

Abstract

A possibility to search for a heavy isosinglet (sterile) neutrino using its decay mode $ν_s \to l^{\pm} + 2 jets$ in the $S$ - channel production $pp \to W^* + X \to l^{\pm}ν_s + X$ in the CMS experiment is studied. The only assumption about the heavy neutrino is its nonzero mixing with $ν_e$ or $ν_μ$. The corresponding CMS discovery potential expressed in terms of the heavy neutrino mass and the mixing parameter between the heavy and light neutrino is determined. It is shown that the heavy neutrino with a mass up to 800 $GeV$ could be detected in CMS. We also investigate the production of the heavy neutrino $N_l$ mixed with $ν_e$ and/or $ν_μ$ in the $SU_C(3) \otimes SU_L(2) \otimes SU_R(2)\otimes U(1)$ model through the reaction $pp \to W_R + X \to l^{\pm}N_l + X$ with the same heavy neutrino decay channel as above. We find that for $M_{W_R} < 3 TeV$ it is possible to discover the heavy neutrino with a mass up to $0.75 \cdot M_{W_R}$.