Simultaneous Measurement of the Ratio R=B(t→Wb)/B(t→Wq) and the Top-Quark Pair Production Cross Section with the D0 Detector at s=1.96TeV
Abstract
We present the first simultaneous measurement of the ratio of branching fractions, R=B(t→Wb)/B(t→Wq), with q being a d, s, or b quark, and the top-quark pair production cross section σt tmacr in the lepton plus jets channel using 0.9fb-1 of p pmacr collision data at s=1.96TeV collected with the D0 detector. We extract R and σt tmacr by analyzing samples of events with 0, 1, and ≥2 identified b jets. We measure R=0.97-0.08+0.09(stat+syst) and σt tmacr =8.18-0.84+0.90(stat+syst)±0.50(lumi)pb, in agreement with the standard model prediction.
- Publication:
-
Physical Review Letters
- Pub Date:
- May 2008
- DOI:
- arXiv:
- arXiv:0801.1326
- Bibcode:
- 2008PhRvL.100s2003A
- Keywords:
-
- 13.85.Lg;
- 12.15.Hh;
- 13.85.Qk;
- 14.65.Ha;
- Total cross sections;
- Determination of Kobayashi-Maskawa matrix elements;
- Inclusive production with identified leptons photons or other nonhadronic particles;
- Top quarks;
- High Energy Physics - Experiment
- E-Print:
- submitted to Phys.Rev.Letters