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Observation of the associated production of a single top quark and a $W$ boson in $pp$ collisions at $\sqrt s =$8 TeV

The collaboration
Phys.Rev.Lett. 112 (2014) 231802, 2014

Abstract (data abstract)
CERN-LHC. The first observation of the associated production of a single top quark and a W boson is presented. The analysis is based on a data set corresponding to an integrated luminosity of 12.2 inverse femtobarns of proton-proton collisions at sqrt(s) = 8 TeV recorded by the CMS experiment at the LHC. Events with two leptons and a jet originating from a b quark are selected. A multivariate analysis based on kinematic and topological properties is used to separate the signal from the dominant t t-bar background. An excess consistent with the signal hypothesis is observed, with a significance which corresponds to 6.1 standard deviations above a background-only hypothesis. The measured production cross section is 23.4 +- 5.4 pb, in agreement with the standard model prediction.

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Data from Page 5 of preprint

10.17182/hepdata.61399.v1/t1

Measured cross section for associated production of a single top quark and a W boson, where the uncertainty is mainly...