2010

Observation of Single Top Quark Production and Measurement of |Vtb| with CDF

CDF Collaboration, Aaltonen, T.

Understand

We report the observation of electroweak single top quark production in 3.2 fb-1 of ppbar collision data collected by the Collider Detector at Fermilab at sqrt{s}=1.96 TeV.

Candidate events in the W+jets topology with a leptonically decaying W boson are classified as signal-like by four parallel analyses based on likelihood functions, matrix elements, neural networks, and boosted decision trees.
These results are combined using a super discriminant analysis based on genetically evolved neural networks in order to improve the sensitivity.
This combined result is further combined with that of a search for a single top quark signal in an orthogonal sample of events with missing transverse energy plus jets and no charged lepton.

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