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| Channel | Method | Measurement | Uncertainty | Integrated Luminosity [fb1] |
Documentation | ||||||||||||||||||||||||
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| Lepton+jets, dilepton, and alljets |
Many methods | World average measurement 172.4 ±0.7 (stat) ±1.0 (syst) GeV |
±0.7% | ≤ 2.1 | 8/3/08 arXiv:0808.1089 |
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| Lepton+jets and dileptons |
Many methods | DØ's measurements combined 172.8 ± 0.9 (stat) ± 1.3 (syst) GeV |
±0.9% | ≤ 2.8 | 7/25/08 Conference note Figures |
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| Lepton+jets | Matrix elements with in-situ JES calibration (NN b-tagging) |
DØ's most precise single measurement 172.2 ± 1.0 (stat) ± 1.4 (syst) GeV |
±1.0% | 2.1 | 7/25/08 Conference note Figures |
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| Electron+muon | Matrix elements (topological) |
172.9 ± 3.6 (stat) ± 2.3 (syst) GeV | ±2.5% | 2.8 | 7/25/08 Conference note Figures |
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| Dileptons | Neutrino weighting (NN b-tagging and topological selection) |
176.0 ± 5.3 (stat) ± 2.0 (syst) GeV | ±3.2% | 1.0 | 7/25/08 Conference note Figures |
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| Lepton+jets, dileptons, and tau+lepton |
From the ttbar cross section |
169.6 +5.4 5.5 (stat+syst) GeV | ± 3.2% | 1.0 | 7/25/08 Conference note Figures |
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| Dileptons | Matrix weighting (topological) |
175.2 ± 6.1 (stat) ± 3.4 (syst) GeV | ± 4.0% | 1.0 |
8/9/07 Conference note Figures |
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| Lepton+jets | Matrix elements with in-situ JES calibration (NN b-tagging) |
171.5 ± 1.8 (stat+JES) ± 1.1 (syst) GeV | ± 1.2% | 1.0 | Submitted to
PRL 7/14/08 Figures |
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| Lepton+jets | Determined from l+jets cross section |
170 ± 7 GeV | ± 4.1% | 0.9 |
PRL 100, 192004 (2008) 5/15/08 Figures |
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| Lepton+jets | Ideogram (lifetime b-tagging and topological selection) |
173.7 ± 4.4 (stat+JES) +2.1 2.0 (syst) GeV | ± 2.8% | 0.42 |
PRD 75, 092001 (2007) 5/11/07 Figures |
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| Dileptons | Matrix weighting (lifetime b-tagging and untagged) |
176.2 ± 9.2 (stat) ± 3.9 (syst) GeV | ± 5.7% | 0.37 |
PLB 655, 7 (2007) 9/6/07 Figures Plain-english summary |
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| Neutrino weighting (topological selection and lepton+track) |
179.5 ± 7.4 (stat) ± 5.6 (syst) GeV | ± 5.2% | |||||||||||||||||||||||||||
| Combination of the above two results (various) |
178.1 ± 6.7 (stat) ± 4.8 (syst) GeV | ± 4.6% | |||||||||||||||||||||||||||
| Lepton+jets | Matrix element with in-situ JES calibration (lifetime b-tagging) |
170.3 +4.1 4.5 (stat+JES) +1.2 1.8 (syst) GeV | +2.5% 2.8% | 0.37 |
PRD 74, 092005 (2006) 11/27/06 Figures |
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| Matrix element with in-situ JES calibration (topological selection) |
169.2 +5.0 7.4 (stat+JES) +1.5 1.4 (syst) GeV | +3.1% 4.5% | |||||||||||||||||||||||||||
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| Lepton+jets, dileptons, and tau+lepton |
NN b-tagging and topological |
7.83 +0.46 0.45 (stat) +0.64 0.53 (syst) ± 0.48 (lumi) pb | +12% 11% | 1.0 | 7/25/08 Conference note Figures |
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| Tau+lepton | NN b-tagging | 7.3 +1.3 1.2 (stat) +1.2 1.1 (syst) ± 0.5 (lumi) pb | +25% 23% | 2.2 | 7/9/08 Conference note Figures |
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| Lepton+track and dileptons |
NN b-tagging and topological |
6.2 ± 0.9 (stat) +0.8 0.7 (syst) ± 0.4 (lumi) pb | +20% 19% | 1.0 | 8/9/07 Conference note Figures |
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| Lepton+jets | Muon b-tagging | 7.3 +2.0 1.8 (stat+syst) ± 0.4 (lumi) pb | +28% 25% | 0.42 |
10/27/06 Conference note Figures |
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| Tau+jets | Lifetime tagging | 5.1 +4.3 3.5 (stat) ± 0.7 (syst) ± 0.3 (lumi) pb | +86% 70% | 0.35 |
9/13/06 Conference note Figures |
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| Lepton+jets | NN b-tagging and topological |
World's most precise measurement 7.62 ± 0.85 pb for mtop = 172.6 GeV 7.42 ± 0.53 (stat) ± 0.46 (syst) ± 0.45 (lumi) pb for mtop = 175 GeV |
± 11% | 0.9 |
PRL 100, 192004 (2008) 5/15/08 Figures |
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| Lepton+jets | NN b-tagging and topological (simultaneous with B(t→Wb)/B(t→Wq), see below) |
8.18 +0.90 0.84 (stat + syst) ± 0.50 (lumi) pb | +13% 12% | 0.9 |
PRL 100, 192003 (2008) 5/14/08 Figures |
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| Dileptons | Topological | 7.4 ± 1.4 (stat) ± 0.9 (syst) ± 0.5 (lumi) pb | ± 23% | 0.42 |
PRD 76, 052006 (2007) 9/28/07 Figures |
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| Lepton+jets | Topological | 6.4 +1.3 1.2 (stat) ± 0.7 (syst) ± 0.4 (lumi) pb | +24% 23% | 0.42 |
PRD 76, 092007 (2007) 11/27/07 Figures |
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| Alljets | Lifetime tagging | 4.5 +2.0 1.9 (stat) +1.4 1.1 (syst) ± 0.3 (lumi) pb | +55% 49% | 0.41 |
PRD 76, 072007 (2007) 10/19/07 Figures |
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| Lepton+jets | Lifetime tagging | 6.6 ± 0.9 (stat+syst) ± 0.4 (lumi) pb | ± 15% | 0.42 |
PRD 74, 112004 (2006) 12/26/06 Figures |
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| Lepton+jets | Lifetime tagging | 8.6 +1.6 1.5 (stat+syst) ± 0.6 (lumi) pb | +20% 19% | 0.23 |
PLB 626, 35 (2005) 9/15/05 Figures Plain-english summary |
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| Lepton+jets | Topological | 6.7 +1.4 1.3 (stat) +1.6 1.1 (syst) ± 0.4 (lumi) pb | +32% 26% | 0.23 |
PLB 626, 45 (2005) 9/15/05 Figures Plain-english summary |
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| Dileptons | Topological | 8.6 +3.2 2.7 (stat) ± 1.1 (syst) ± 0.6 (lumi) pb | +40% 35% | 0.23 |
PLB 626, 55 (2005) 9/15/05 Figures Plain-english summary |
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| Other Top Quark Properties |
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| Lepton+jets, dileptons, and tau+lepton |
Decay to charged Higgs boson |
B(t→H+b) < 0.20 (95% CL)
(leptophobic H+) B(t→H+b) < 0.12 to 0.20 (95% CL) (tauonic H+) |
1.0 | 7/25/08 Conference note Figures |
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| Lepton+jets and dileptons |
Right-handed W's | f0 = 0.490
±0.106 (stat) ±0.085 (syst) f+ = 0.110 ±0.059 (stat) ±0.052 (syst) |
2.7 | 7/25/08 Conference note Figures |
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| Lepton+jets | Search for tt resonances from leptophobic Z' bosons |
MZ' < 760 GeV excluded at 95% CL for ΓZ' = 1.2% MZ' |
2.1 |
3/7/08 Conference note Figures |
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| Lepton+jets | Scalar top pair production |
| 0.9 | 7/19/07 Conference note Figures Plain-english summary |
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| Lepton+jets | Search for tt resonances from leptophobic Z' bosons |
MZ' < 700 GeV excluded at 95% CL for ΓZ' = 1.2% MZ' |
0.9 | Accepted in
PLB 8/13/08 Figures |
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| Lepton+jets | Measurement of R = B(t→Wb)/B(t→Wq) (simultaneous with tt cross section, see above) |
R = 0.97
+0.09 0.08 (stat+syst)
, R > 0.79 (95% CL) |Vtb| > 0.89 (95% CL) (if 3x3 CKM is unitary) |
0.9 |
PRL 100, 192003 (2008) 5/14/08 Figures |
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| Lepton+jets | Forward-backward charge asymmetry in tt production and Z' resonance limit |
(12 ± 8 (stat) ± 1 (syst) )% | 0.9 |
PRL 100, 142002 (2008) 4/9/08 Figures |
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| Lepton+jets and dileptons |
Right-handed W's | f0 = 0.425
±0.166 (stat) ±0.102 (syst) f+ = 0.119 ±0.090 (stat) ±0.053 (syst) |
1.0 |
PRL 100, 062004 (2008) 2/14/08 Figures Plain-english summary |
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| Lepton+jets and dileptons |
Right-handed W's | f+ = 0.056
±0.080 (stat) ±0.057 (syst) f+ < 0.23 (95% CL) |
0.37 |
PRD 75, 031102(R) (2007) 2/5/07 Figures |
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| Lepton+jets | Top quark charge |
4e/3 excluded at 92% CL Fraction of exotic quark pairs < 0.80 (90% CL) |
0.37 |
PRL 98, 041801 (2007) 1/22/07 Figures Clarification |
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| Lepton+jets | Measurement of R = B(t→Wb)/B(t→Wq) |
R = 1.03
+0.19 0.17 (stat+syst) R > 0.61 and |Vtb| > 0.78 (95% CL) |
0.23 |
PLB 639, 616 (2006) 7/24/06 Figures |
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| Lepton+jets | Right-handed W's (topological and lifetime) |
Fraction of right-handed W's in top decays = f+ f+= 0.00 ± 0.13 (stat) ± 0.07 (syst) f+ < 0.25 (95% CL) |
0.23 |
PRD 72, 011104 (2005) 7/29/05 Figures Plain-english summary |
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| Lepton+jets | Wtb couplings | Limits set on left-handed and righthanded vector and tensor couplings |
95% C.L. | 0.9 | Submitted to
PRL 7/10/08 Figures |
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| H+→tb search | Type I 2HDM model excluded for M(H+ = 180185 GeV and tan(β) = 2070 approx and limits on Types II and III set |
95% C.L. | Submitted to
PRL 7/8/08 Figures |
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| W'→tb search | M(W'(left)→ln,qq) > 731 GeV M(W'(right)→ln,qq) > 739 GeV M(W'(right)→qq) > 768 GeV |
95% C.L. |
PRL 100, 211803 (2008) 5/30/08 Figures |
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| Combination of DT, new-ME, and new-BNN |
sigma(tb+X,tqb+X) = 4.7
± 1.3
pb (3.6 std. dev. significance) | ± 28% |
PRD 78, 012005 (2008) 7/14/08 Figures |
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| Matrix elements | sigma(tb+X,tqb+X) = 4.8 +1.6 1.4 pb |
+33% 29% | |||||||||||||||||||||||||||
| Bayesian neural networks | sigma(tb+X,tqb+X) = 4.4 +1.6 1.4 pb |
+36% 32% | |||||||||||||||||||||||||||
| Boosted decision trees | sigma(tb+X,tqb+X) = 4.9
± 1.4
pb (3.4 std. dev. significance) s-channel: σ(tb+X) = 1.0 ± 0.9 pb t-channel: σ(tqb+X) = 4.2 +1.8 1.4 pb |
± 29% ±90% +43% 33% |
"Evidence for production of single top quarks" PRL 98, 181802 (2007) 5/1/07 Figures Plain-english summary Analysis details |
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| Matrix elements | sigma(tb+X,tqb+X) = 4.6 +1.8 1.5 pb |
+39% 33% | |||||||||||||||||||||||||||
| Bayesian neural networks | sigma(tb+X,tqb+X) = 5.0 ± 1.9 pb |
± 38% | |||||||||||||||||||||||||||
| Lepton+jets | FCNC search | κgc/Λ < 0.15 TeV-1 κgu/Λ < 0.037 TeV-1 |
95% C.L. | 0.23 |
PRL 99, 191802 (2007) 11/6/07 Figures |
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| W' search | M(W'(right)→ln,qq) > 630 GeV M(W'(right)→qq) > 670 GeV |
95% C.L. |
PLB 641, 423 (2006) 9/28/06 Figures Plain-english summary Analysis details |
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| Cuts | s-channel: sigma(tb) < 10.6 pb t-channel: sigma(tqb) < 11.3 pb |
95% C.L. |
PRD 75, 092007 (2007) 5/29/07 Figures (Includes NN result below) |
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| Neural networks | s-channel: sigma(tb) < 6.4 pb t-channel: sigma(tqb) < 5.0 pb |
95% C.L. |
PLB 622, 265 (2005) 7/21/05 Figures Plain-english summary Analysis details |
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