Search for high-mass resonances in final states with a lepton and missing transverse momentum at $\sqrt{s}=$ 13 TeV

TL;DR

This paper reports a search for high-mass resonances in proton-proton collisions at 13 TeV, using the CMS detector, finding no deviations from the standard model and setting new limits on W' bosons, extra dimensions, and supersymmetric models.

Contribution

It provides the first search results for high-mass resonances with a lepton and missing transverse momentum at 13 TeV, setting new exclusion limits on several beyond-standard-model theories.

Findings

No significant deviation from the standard model observed.

Excludes W' bosons below 5.2 TeV at 95% CL.

Sets limits on extra dimension models and supersymmetric scenarios.

Abstract

A search for new high-mass resonances in proton-proton collisions having final states with an electron or muon and missing transverse momentum is presented. The analysis uses proton-proton collision data collected in 2016 with the CMS detector at the LHC at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb$^{-1}$. The transverse mass distribution of the charged lepton-neutrino system is used as the discriminating variable. No significant deviation from the standard model prediction is found. The best limit, from the combination of electron and muon channels, is 5.2 TeV at 95% confidence level for the mass of a W$'$ boson with the same couplings as those of the standard model W boson. Exclusion limits of 2.9 TeV are set on the inverse radius of the extra dimension in the framework of split universal extra dimensions. In addition, model-independent limits are set on the production cross section and coupling strength of W$'$ bosons decaying into this final state. An interpretation is also made in the context of an R parity violating supersymmetric model with a slepton as a mediator and flavor violating decay.