Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2005-01-05
Int.J.Mod.Phys.A20:3180-3182,2005
Physics
High Energy Physics
High Energy Physics - Experiment
3 pages, 4 figures, DPF 2004 proceeding
Scientific paper
10.1142/S0217751X0502608X
We present measurements of the top-antitop production cross section in b-tagged lepton + jets events from proton-antiproton collisions at 1.96 TeV using the CDF detector at Fermilab. B-jets are tagged with either a secondary vertex algorithm, or a soft lepton tagger that identifies muons from B hadron semileptonic decays. With Tevatron Run II data, we estimate the top-antitop signal fraction in two different ways: by estimating the various background contributions, and by fitting directly the leading jet transverse energy spectrum for the signal and background contributions. A subset of the sample with two secondary vertex tagged jets yields a production cross section consistent with the inclusive measurements. Results are consistent with a Standard Model top-antitop signal and current measurements of the top quark mass.
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