Abstract
We calculate top pair production and decay at the Tevatron p p collider, with the emission of an extra gluon, and study the corresponding W + 5 jet top signals including full spin correlations in the W → ℓ v leptonic and W → jj hadronic decays. We study the feasibility of reconstructing W + 5 jet top events with a single b-tag, including realistic energy resolution. Our suggested basic procedure based on kinematic fitting achieves about 74% reconstruction efficiency, with 74% of the reconstructed events correctly classified (purity); this improves to 82% efficiency with 77% purity in double- b-tagged events. We suggest possible refinements, based on virtuality criteria, that give higher purity at the cost of lower reconstruction efficiency.
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