Search for heavy neutrinos and W bosons with right-handed couplings in proton-proton collisions at root s=8TeV

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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.

MASS, Physics, Particles & Fields, Physics
Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Erö, J., Fabjan, C., Friedl, M., Frühwirth, R., Ghete, V. M., Hartl, C., Hörmann, N., Hrubec, J., Jeitler, M., Kiesenhofer, W., Knünz, V., Krammer, M., … Woods, N. (2014). Search for heavy neutrinos and $\mathrm {W}$ W bosons with right-handed couplings in proton–proton collisions at $\sqrt{s} = 8\,\text {TeV} $ $\sqrt{s}$=8TeV. In The European Physical Journal C (Vol. 74, Issue 11). Springer Science and Business Media LLC.