Abstract
A search is presented for W′ bosons in events with an electron or muon and large missing transverse momentum, using proton–proton collision data at s=13 TeV collected with the CMS detector in 2015 and corresponding to an integrated luminosity of 2.3 fb−1. No evidence of an excess of events relative to the standard model expectations is observed. For a W′ boson described by the sequential standard model, upper limits at 95% confidence level are set on the product of the production cross section and branching fraction and lower limits are established on the new boson mass. Masses below 4.1 TeV are excluded combining electron and muon decay channels, significantly improving upon the results obtained with the 8 TeV data. Exclusion limits at 95% confidence level on the product of the W′ production cross section and branching fraction are also derived in combination with the 8 TeV data. Finally, exclusion limits are set for the production of generic W′ bosons decaying into this final state using a model-independent approach.
Highlights
Many standard model (SM) extensions require additional heavy gauge bosons
The results presented in this Letter are based on the analysis of 2.3 fb−1 of pp√collision data collected with the CMS detector during 2015, at s = 13 TeV
A search has been performed for sequential standard model W bosons in final states containing a single energetic electron or muon and large missin√g transverse momentum, using proton– proton collision data at s = 13 TeV, corresponding to an integrated luminosity of 2.3 fb−1
Summary
Many standard model (SM) extensions require additional heavy gauge bosons. In particular, the sequential standard model (SSM) [1] predicts the existence of a new massive boson, W , exhibiting the same couplings as the SM W boson, i.e., with final states consisting either of a charged lepton and neutrino or a quark pair. 3.22 TeV in the electron channel and 2.99 TeV in the muon channel [7] Combining both channels resulted in an exclusion of W bosons with √a mass less than 3.28 TeV. ATLAS [9] using SSM W bosons with masses less than 4.07 TeV, for the combination of the electron and muon decay channels. The results presented in this Letter are based on the analysis of 2.3 fb−1 of pp√collision data collected with the CMS detector during 2015, at s = 13 TeV. Limits are given both for the SSM interpretation, and for a generic W , enabling constraints to be placed on a variety of other models
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