2008

Evidence for production of single top quarks

D0 Collaboration

Understand

We present first evidence for the production of single top quarks in the D0 detector at the Fermilab Tevatron ppbar collider.

The standard model predicts that the electroweak interaction can produce a top quark together with an antibottom quark or light quark, without the antiparticle top quark partner that is always produced from strong coupling processes.
Top quarks were first observed in pair production in 1995, and since then, single top quark production has been searched for in ever larger datasets.
In this analysis, we select events from a 0.9 fb-1 dataset that have an electron or muon and missing transverse energy from the decay of a W boson from the top quark decay, and two, three, or four jets, with one or two of the jets identified as originating from a b hadron decay.

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