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| Authors | V.M. Abazov, . et al, M. Anastasoaie, L.S. Ancu, S.J. de Jong, F. Filthaut, C.F. Galea, J.G. Hegeman, P. Houben, M.M. Meijer, P. Svoisky, P.J. van den Berg, W.M. van Leeuwen | | Title | Measurement of the t anti-t production cross section and top quark mass extraction using dilepton events in p anti-p collisions |
| Journal | Physics Letters B |
| Volume | 679 |
| Year | 2009 |
| Issue | 3 |
| Pages | 177-185 |
| ISSN | 03702693 |
| Faculty | Faculty of Science |
| Institute/dept. | FNWI: Institute for High Energy Physics (IHEF) |
| Abstract | We present a measurement of the top quark pair production cross section in p (p) over bar collisions at root s = 1.96 TeV using approximately 1 fb(-1) collected with the DO detector. We consider decay channels containing two high p(T) charged leptons where one lepton is identified as an electron or a muon while the other lepton can be an electron, a muon or a hadronically decaying tau lepton. For a mass of the top quark of 170 GeV, the measured cross section is 7.5(-1.0)(+1.0)(stat)(-0.6)(+0.7)(syst)(-0.5)(+0.6)(lumi) pb. Using l tau events only, we measure: sigma(t (t) over bar) x B(t (t) over bar -> l tau b (b) over bar) = 0.13(-0.08)(+0.09)(stat)(-0.06)(+0.06)(syst)(-0.02)(+0.02)(lumi) pb. Comparing the measured cross section as a function of the mass of the top quark with a partial next-to-next-to leading order Quantum Chroniodynamics theoretical prediction, we extract a mass of the top quark of 171.5(-8.8)(+9-9) GeV, in agreement with direct measurements. |
| Document type | Article |
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