Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2009-03-31
Phys.Rev.D80:071102,2009
Physics
High Energy Physics
High Energy Physics - Experiment
8 pages, 4 figures
Scientific paper
10.1103/PhysRevD.80.071102
We combine measurements of the top quark pair production cross section in ppbar collisions in the l+jets, ll and tau-l final states (where l is an electron or muon) at a center of mass energy of sqrt(s)=1.96 TeV in 1fb^{-1} of data collected with the D0 detector. For a top quark mass of 170 GeV, we obtain sigma_ttbar=8.18^{+0.98}_{-0.87} pb. In addition, the ratios of ttbar cross sections in different final states are used to set upper limits on the branching fractions B(t -> H^{+}b -> tau nu b) and B(t -> H^{+}b -> c sbar b) as a function of charged Higgs boson mass. Based on predictions from higher order quantum chromodynamics, we extract a mass for the top quark from the combined ttbar cross section.
"D0 Collaboration
Abazov V.
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