Measurement of the ttbar production cross section in ppbar collisions using dilepton events

Details Measurement of the ttbar production cross section in ppbar collisions using dilepton events Measurement of the ttbar production cross section in ppbar collisions using dilepton events

2007-06-04

arxiv.org/abs/0706.0458v2

Phys.Rev.D76:052006,2007

Physics

High Energy Physics

High Energy Physics - Experiment

26 pages, 9 figures, submitted to Phys. Rev. D

Scientific paper

10.1103/PhysRevD.76.052006

We present a measurement of the ttbar pair production cross section in ppbar collisions at sqrt(s) = 1.96 TeV utilizing approximately 425 pb-1 of data collected with the D0 detector. We consider decay channels containing two high pT charged leptons (either e or \mu) from leptonic decays of both top-daughter W bosons. These were gathered using four sets of selection criteria, three of which required that a pair of fully identified leptons (i.e., e\mu, ee, or \mu\mu) be found. The fourth approach imposed less restrictive criteria on one of the lepton candidates and required that at least one hadronic jet in each event be tagged as containing a b quark. For a top quark mass of 175 GeV, the measured cross section is 7.4 +/-1.4(stat} +/- 1.0(syst) pb.

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