Measurement of the ttbar Production Cross Section in ppbar Collisions at sqrt(s) = 1.96 TeV

Details Measurement of the ttbar Production Cross Section in ppbar Collisions at sqrt(s) = 1.96 TeV Measurement of the ttbar Production Cross Section in ppbar Collisions at sqrt(s) = 1.96 TeV

2006-06-07

arxiv.org/abs/hep-ex/0606017v2

Phys.Rev.Lett.97:082004,2006

Physics

High Energy Physics

High Energy Physics - Experiment

Accepted for publication in Physics Review Letters, 7 pages

Scientific paper

10.1103/PhysRevLett.97.082004

We present a measurement of the top quark pair production cross section in ppbar collisions at sqrt(s)=1.96 TeV using 318 pb^{-1} of data collected with the Collider Detector at Fermilab. We select ttbar decays into the final states e nu + jets and mu nu + jets, in which at least one b quark from the t-quark decays is identified using a secondary vertex-finding algorithm. Assuming a top quark mass of 178 GeV/c^2, we measure a cross section of 8.7 +-0.9 (stat) +1.1-0.9 (syst) pb. We also report the first observation of ttbar with significance greater than 5 sigma in the subsample in which both b quarks are identified, corresponding to a cross section of 10.1 +1.6-1.4(stat)+2.0-1.3 (syst) pb.

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