Search for a heavy right-handed W boson and a heavy neutrino in events with two same-flavor leptons and two jets at sqrt(s)=13 TeV

A search for a heavy right-handed $\mathrm W$ gauge boson and a heavy right-handed neutrino at the CERN LHC has been conducted by the CMS collaboration in events with two same-flavor leptons ($\mathrm e$ or $\mu$) and two jets, using 2016 proton-proton collision data corresponding to an integrated luminosity of $\mathrm{35.9\,fb^{-1}}$. No excess above the standard model expectation is seen in the invariant mass distribution of the dilepton plus dijet system. Assuming identical couplings and decay branching fractions as the standard model $\mathrm W$ gauge boson, and that only one heavy neutrino flavor ${\mathrm N}_R$ contributes significantly to the ${\mathrm W}_R$ decay width, the region in the two-dimensional ($m_{{\mathrm W}_R}$, $m_{{\mathrm N}_R}$) mass plane excluded at a $95\%$ confidence level extends to approximately $m_{{\mathrm W}_R}= \mathrm{4.4\,TeV}$ and covers a large range of neutrino masses below the ${\mathrm W}_R$ boson mass. This analysis provides the most stringent limits to date.