DØ's Top Quark Physics Results

Conveners:   Yvonne Peters (Manchester)
Slava Sharyy (CEA-Saclay)
Zhenyu Ye (Fermilab)
 
Mass
 		 tt Cross Section Properties New Particles Single Top

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DZero's top mass combination plot  
• DØ's top quark mass  
combination  
January 2012  
 Tevatron average top mass plot  
• Tevatron combination  
top quark mass  
July 2011  
 Top Quark Mass
    Higgs boson mass allowed range
• LEP EW Working Group
  July 2011  
 Constraints on Higgs boson mass from top and W masses
• More plots
  July 2011
Lepton+jets,
dileptons,
and alljets		 Many methods Tevatron Combination
173.18 ±0.56 (stat) ±0.75 (syst) GeV
= 173.18 ± 0.94 GeV		 ±0.54% ≤ 5.8 7/27/11
arXiv:1107.5255
Figures
Lepton+jets
and dileptons		 Many methods DØ Combination
175.08 ±0.77 (stat) ±1.25 (syst) GeV
= 175.1 ± 1.5 GeV		 ±0.84% ≤ 5.4 4/25/11
Conference note
Figures
Lepton+jets Matrix elements 174.94 ± 0.83(stat) ±0.78(JES) ±1.02(syst) GeV ±0.87% 3.6 PRD 84, 032004 (2011)
8/9/11
Figures
Matrix elements with
in-situ JES calibration
(NN b-tagging)		 171.5 ± 1.8 (stat+JES) ± 1.1 (syst) GeV ± 1.2% 1.0 PRL 101, 182001 (2008)
10/29/08
Figures
Determined from
ttbar cross section		 170 ± 7 GeV ± 4.1% 0.9 PRL 100, 192004 (2008)
5/15/08
Figures
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
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
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%
Lepton+jets Pole and MS Masses
from cross section		 Pole mass between 163.0 and 167.5 GeV
MS mass between 154.5 and 160.0 GeV
depending on Xsec calculation		 5.3 PLB 703, 422 (2011)
8/11/11
Figures
Lepton+jets,
dileptons, and
tau+lepton		 Determined from
ttbar cross section		 169.1  +5.9 –5.2 GeV +3.5% –3.1% 1.0 PRD 80, 071102 (2009)
10/19/09
Figures
Dileptons Neutrino weighting 174.0 ± 2.4 (stat) ± 1.4 (syst) GeV ±1.6% 5.3 Submitted to PRL
1/25/12
Figures
Matrix elements 174.0 ± 1.8 (stat) ± 2.4 (syst) GeV ±1.8% 5.4 PRL 107, 082004 (2011)
8/19/11
Figures
Neutrino weighting and
Matrix weighting		 174.7 ± 4.4 (stat) ± 2.0 (syst) GeV
(includes lepton+track)		 ±2.8% 1.0 PRD 80, 092006 (2009)
11/20/09
Figures
Determined from
ttbar cross section		 171.5 +9.9 –8.8 (stat+syst) GeV
(includes lepton+tau)		 +5.8% –5.1% 1.0 PLB 679, 177 (2009)
7/21/09
Figures
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
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%
DZero's top pair cross section plot  
• July 2011         
 DZero's cross section versus mass plot for dileptons  
• Dileptons, March 2010		 Top Pair Production Cross Section

Results quoted for mtop = 175 GeV		    DZero's cross section versus mass plot
   • (l+jets)+(dileptons)+(lepton+tau)
        March 2009
Combinations NN b-tagging
and topological		 7.56  +0.63 –0.56 (stat+syst+lumi) pb
(mtop=172.5 GeV)		 +8.3% –7.4% 5.4 PLB 704, 403 (2011)
9/17/11
Figures
NN b-tagging
and topological		 8.18  +0.98 –0.87 pb     (mtop = 170 GeV) +12% –11% 1.0 PRD 80, 071102 (2009)
10/19/09
Figures
Lepton+jets NN b-tagging
and topological		 7.78  +0.77 –0.64 (stat+syst+lumi) pb
(mtop=172.5 GeV)		 +9.9% –8.2% 5.3 PRD 84, 012008 (2011)
7/25/11
Figures
NN b-tagging
and topological		 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
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
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
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
Lifetime tagging 6.6  ± 0.9 (stat+syst) ± 0.4 (lumi) pb ± 15% 0.42 PRD 74, 112004 (2006)
12/26/06
Figures
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
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
Lepton+jets Differential cross section
in top quark pT		 Differential cross section and ratios with theory 1.0 PLB 693, 515 (2010)
9/15/10
Figures
Dileptons Topological
NN b-tagging		 7.36  +0.90 –0.79 (stat+syst+lumi) pb
(mtop=172.5 GeV)		 +12% –11% 5.4 PLB 704, 403 (2011)
9/14/11
Figures
NN b-tagging
and topological		 7.09  +0.98 –0.92 (stat) +0.78 –0.57 (syst) +0.62 –0.49 (lumi)
(includes lepton+tau) pb		 +20% –17% 1.0 PLB 679, 177 (2009)
7/21/09
Figures
Topological 7.4  ± 1.4 (stat) ± 0.9 (syst) ± 0.5 (lumi) pb ± 23% 0.42 PRD 76, 052006 (2007)
9/28/07
Figures
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
Alljets NN b-tagging 6.9  ±1.3 (stat) ±1.4 (syst) ±0.4 (lumi) pb ±29% 1.0 PRD 82, 032002 (2010)
8/20/10
Figures
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
Tau+jets NN b-tagging 6.30  +1.15 −1.09 (stat) +0.72 −0.67 (syst) ±0.40 (lumi) pb +38% −20% 1.0 PRD 82, 071102 (2010)
10/27/10
Figures
Tau+lepton NN b-tagging 7.3  +1.3 –1.2 (stat) +1.2 –1.1 (syst) ± 0.5 (lumi) pb +25% –23% 2.1 7/9/08
Conference note
Figures
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
Lepton+track NN b-tagging 5.1  +1.6 –1.4 (stat) +0.9 –0.8 (syst) ± 0.3 (lumi) pb +36% –32% 1.0 8/9/07
Conference note
Figures
 
Other Properties
 
    Properties of the Top Quark
Lepton+jets
 Width and lifetime
(from tqb Xsec and
B(t→Wb)/B(t→Wq))		 Top quark width = 2.00 +0.47 −0.43 GeV
Top quark lifetime = (3.29 +0.90 –0.63 ) × 10-25 s
0.81 < |Vtb| < 1    at 95% CL
|Vtb′| < 0.59    at 95% CL		 5.4 Submitted to PRD
1/20/12
Figures
Top quark width = 1.99 +0.69 −0.55 GeV
Top quark lifetime = (3.3 +1.3 –0.9 ) × 10-25 s
|Vtb′| < 0.63    at 95% CL		 2.3, 1.0 PRL 106, 022001 (2011)
1/11/11
Figures
Top and antitop
mass difference		 Mtop – Mantitop = 0.8 ± 1.8 (stat) ± 0.5 (syst) GeV 3.6 PRD 84, 052005 (2011)
9/14/11
Figures
Mtop – Mantitop = 3.8 ± 3.7 GeV 1.0 PRL 103, 132001 (2009)
9/21/09
Figures
Nature news
Physics Today news
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
    Properties of Production of tt Pairs
Lepton+jets Forward-backward
charge asymmetry		 (9.2  ± 3.7 )%   (reconstruction level)
(19.6  ± 6.5 )%   (unfolded)		 5.4 PRD 84, 112055 (2011)
11/7/11
Figures
(12  ± 8 (stat) ± 1 (syst) )% 0.9 PRL 100, 142002 (2008)
4/9/08
Figures
Lepton+jets
and dileptons		 Spin correlations Correlated fraction = 0.85 ± 0.29 (stat+syst)
using matrix elements
> 3 σ significance for correlation		 5.3 PRL 108, 032004 (2012)
1/19/12
Figures
Dileptons Correlation strength = 0.10 ± 0.45 (stat+syst)
using angular distribution templates		 5.4 PLB 702, 16 (2011)
6/29/11
Figures
Correlation strength = 0.57 ± 0.31 (stat+syst)
using matrix elements		 5.4 PRL 107, 032001 (2011)
7/14/11
Figures
    Properties of Decay of tt Pairs
Lepton+jets Color flow (Wcolor-singlet) / (Wall) = 0.56 ± 0.42
(SM = 1)		 5.3 PRD 83, 092002 (2011)
5/10/11
Figures
Top pairs →
trileptons		 tZu and tZc FCNC couplings B(t→Zq) < 3.2% at 95% CL, q = u,c 4.1 PLB 701, 313 (2011)
6/12/11
Figures
Lepton+jets
and dileptons		 B(t→Wb)/B(t→Wq)
 RWb/Wq = 0.90 +0.04 (stat+syst)
|Vtb| = 0.95 ± 0.02  (if 3x3 CKM is unitary)		 5.4 PRL 107, 121802 (2011)
9/15/11
Figures
Lepton+jets RWb/Wq = 0.97 +0.09 –0.08 (stat+syst) ,  RWb/Wq > 0.79  (95% CL)
|Vtb| > 0.89  (95% CL)  (if 3x3 CKM is unitary)		 0.9 PRL 100, 192003 (2008)
5/14/08
Figures
RWb/Wq = 1.03 +0.19 –0.17 (stat+syst)
RWb/Wq > 0.61 and |Vtb| > 0.78  (95% CL)		 0.23 PLB 639, 616 (2006)
7/24/06
Figures
Lepton+jets,
dileptons, and
tau+lepton		 σ(tt→ll)/σ(tt→l+jets)
and
σ(tt→τl)/σ(tt→ll + l+jets)		 Rll/lj = 0.86 +0.19 –0.17 (stat+syst)
Rτl/ll+lj = 0.97 +0.32 –0.29 (stat+syst)		 1.0 PRD 80, 071102 (2009)
10/19/09
Figures
Lepton+jets
and dileptons		 W boson helicity DØ and CDF Combination
f0 = 0.732 ±0.063 (stat) ±0.052 (syst)
f+ = −0.039 ±0.034 (stat) ±0.030 (syst)		 ≤ 5.4 7/22/11
Conference note
Figures
f0 = 0.669 ±0.078 (stat) ±0.065 (syst)
f+ = 0.023 ±0.041 (stat) ±0.034 (syst)		 5.4 PRD 83, 032009 (2011)
11/30/10
Figures
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
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
Lepton+jets 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
    Top Quark Couplings
Top pairs →
trileptons		 tZu and tZc FCNC couplings B(t→Zq) < 3.2% at 95% CL, q = u,c 4.1 PLB 701, 313 (2011)
6/12/11
Figures
Single top
lepton+jets		 Wtb couplings Limits set on
left-handed and right-handed
vector and tensor couplings		 5.4 PLB 703, 21 (2012)
1/16/12
Figures
Single top and
ttbar lepton+jets		 Limits set on
left-handed and right-handed
vector and tensor couplings		 0.9–2.7 2/9/09
Conference note
Figures
Limits set on
left-handed and right-handed
vector and tensor couplings		 1.0 PRL 102, 092002 (2009)
3/4/09
Figures
Single top
lepton+jets		 Limits set on
left-handed and right-handed
vector and tensor couplings		 0.9 PRL 101, 221801 (2008)
11/25/08
Figures
Single top
lepton+jets		 tgu and tgc FCNC couplings σtgu < 0.20 pb,   B(t→gu) < 2.0 × 10-4
σtgc < 0.27 pb,   B(t→gc) < 3.9 × 10-3		 2.3 PLB 693, 81 (2010)
8/6/10
Figures
κgc/Λ < 0.15 TeV-1
κgu/Λ < 0.037 TeV-1 at 95% CL		 0.23 PRL 99, 191802 (2007)
11/6/07
Figures
 
Searches for New Particles
 
Lepton+jets tt resonances from
leptophobic Z′ bosons		 MZ′ < 835 GeV
excluded at 95% CL for ΓZ′ = 1.2% MZ′		 5.3 Submitted to PRL
11/8/11
Figures
MZ′ < 700 GeV
excluded at 95% CL for ΓZ′ = 1.2% MZ′		 0.9 PLB 668, 98 (2008)
8/22/08
Figures
Lepton+jets Fourth generation
t′t′ →WqWq		 Mt′ < 285 GeV
excluded at 95% CL		 5.3 PRL 107, 082001 (2011)
8/16/11
Figures
Lepton+jets
dileptons, and
tau+lepton		 Top decay to
charged Higgs boson		 Limits on B(t→H+b) with hadronic and tauonic decays 1.0 PLB 682, 278 (2009)
11/12/09
Figures
Limits on B(t→H+b) with tauonic and leptophobic decays 1.0 PRD 80, 071102 (2009)
10/19/09
Figures
Lepton+jets Limits on B(t→H+b) with tauonic decays 0.9 PRD 80, 051107 (2009)
9/30/09
Figures
Lepton+jets Scalar top
pair production		 Limits on scalar top masses between 130 to 190 GeV
and chargino masses of 90 to 150 GeV		 0.9 PLB 674, 4 (2009)
2/20/09
Figures
Plain-english summary
Lepton+jets SM Higgs
produced with tt,
with H0→bb		 σ(ttH) < 64 × SM value for MHiggs = 115 GeV
MH < 133 GeV for mt′= 400 GeV and MG′ = 800 GeV at 95% CL		 2.1 3/13/09
Conference note
Figures
Single top
lepton+jets		 H+→tb Type I 2HDM model excluded for
M(H+ = 180–185 GeV at 95% CL
and tan(β) = 20–70 approx
and limits on Types II and III set		 0.9 PRL 102, 191802 (2009)
5/14/09
Figures
Single top
lepton+jets		 W′→tb M(W′(left)→lν,qq) > 863 GeV
M(W′(right)→lν,qq) > 885 GeV
M(W′(left,right)→lν,qq) > 916 GeV
M(W′(right)→qq) > 890 GeV at 95% CL		 2.3 PLB 699, 145 (2011)
3/31/11
Figures
M(W′(left)→lν,qq) > 731 GeV
M(W′(right)→lν,qq) > 739 GeV
M(W′(right)→qq) > 768 GeV at 95% CL		 0.9 PRL 100, 211803 (2008)
5/30/08
Figures
M(W′(right)→ln,qq) > 630 GeV
M(W′(right)→qq) > 670 GeV at 95% CL		 0.23 PLB 641, 423 (2006)
9/28/06
Figures
Plain-english summary
Analysis details
DZero's cross section measurements
• March 2009        
 Mainly DZero's cross section measurements
• December 2009          		  
Single Top Quark
Production

 DZero's s-channel xsec versus t-channel xsec
     • May 2011
 DZero's and CDF's combined cross section measurements
      • December 2009
Lepton+jets Width and lifetime
from tqb Xsec and
B(t→Wb)/B(t→Wq)		 Top quark width = 2.00 +0.47 −0.43 GeV
Top quark lifetime = (3.29 +0.90 –0.63 ) × 10-25 s
0.81 < |Vtb| < 1    at 95% CL
|Vtb′| < 0.59    at 95% CL		 +24% −22%
+27% −19% 		5.4 Submitted to PRD
1/20/12
Figures
Wtb couplings Limits set on
left-handed and right-handed
vector and tensor couplings		 95% C.L. Accepted in PLB
1/16/12
Figures
t+s channels together and separately and |Vtb| σ(tqb+tb) = 3.43 +0.73 −0.74 pb
0.79 < |Vtb| ≤ 1 at 95% CL		 ± 21% PRD 84, 112001 (2011)
12/5/11
Figures
t-channel and s-channel
Xsec measurements
and t vs. s 2d plot		 σ(tqb) = 2.90 ± 0.59 pb
(5.5 std. dev. significance)
σ(tb) = 0.98 ± 0.63 pb		 ± 20%

± 64%		 PLB 705, 313 (2011)
10/20/11
Figures
Tau+jets Xsec limit and
combination with
DØ's observation measurement		 σ(tb+tqb) = 3.84 +0.89 –0.83 pb
(all channels combined)		 +23% –22% 4.8 PLB 690, 5 (2010)
5/6/10
Figures
Lepton+jets Combination of DØ's and CDF's results:
cross section and |Vtb|		 σ(tb+tqb) = 2.76 +0.58 –0.47 pb

 |Vtb| > 0.77   at 95% C.L.    (prior: 0 ≤ |Vtb|2 ≤ 1)
|Vtbf1L| = 0.88 ± 0.07    (prior: |Vtb|2 ≥ 0)		  
+21% –17%
 
 		 2.3, 3.2 8/15/09
Technical memo
Figures
W′→tb search M(W′(left)→lν,qq) > 863 GeV
M(W′(right)→lν,qq) > 885 GeV
M(W′(left,right)→lνqq) > 916 GeV
M(W′(right)→qq) > 890 GeV		 95% C.L. 2.3 PLB 699, 145 (2011)
3/31/11
Figures
Width and lifetime
from tqb Xsec and
B(t→Wb)/B(t→Wq)		 Top quark width = 1.99 +0.69 −0.55 GeV
Top quark lifetime = (3.3 +1.3 –0.9 ) × 10-25 s
|Vtb′| < 0.63    at 95% CL		 +35% −28%
+39% −27% 		2.3, 1.0 PRL 106, 022001 (2011)
1/11/11
Figures
tgu and tgc FCNC couplings σtgu < 0.20 pb,   B(t→gu) < 2.0 × 10-4
σtgc < 0.27 pb,   B(t→gc) < 3.9 × 10-3		 95% C.L. 2.3 PLB 693, 81 (2010)
8/11/10
Figures
t-channel and s-channel
Xsec measurements
and t vs. s 2d plot		 σ(tqb+X) = 3.14 +0.94 –0.80 pb
(4.8 std. dev. significance)
 σ(tb+X) = 1.05 ± 0.81 pb		 +30% –25%

±77%		 PLB 682, 363 (2010)
11/19/09
Figures
Analyses with
boosted decsion trees,
Bayesian neural networks,
matrix elements,
and their combination		 σ(tb+tqb) = 3.94 ± 0.88 pb
5.0 standard deviation significance
(mtop = 170 GeV)

|Vtb| > 0.78   at 95% C.L.    (prior: 0 ≤ |Vtb|2 ≤ 1)
|Vtbf1L| = 1.07 ± 0.12    (prior: |Vtb|2 ≥ 0)		 ± 22%
 
 
 
 
"Observation of
Single Top-Quark
Production"

PRL 103, 092001 (2009)
8/24/09
Figures
Results web page (plots for talks)
SPIRES TOPCITE=100+
Lepton+jets Wtb couplings
(single top, and
tt W helicity, 2.7 fb-1)		 Limits set on
left-handed and right-handed
vector and tensor couplings		 95% C.L. 0.9 2/9/09
Conference note
Figures
H+→tb search Type I 2HDM model excluded for
M(H+ = 180–185 GeV
and tan(β) = 20–70 approx
and limits on Types II and III set		 95% C.L. PRL 102, 191802 (2009)
5/14/09
Figures
Wtb couplings
(single top and
tt W helicity)		 Limits set on
left-handed and right-handed
vector and tensor couplings		 95% C.L. PRL 102, 092002 (2009)
3/4/09
Figures
Wtb couplings Limits set on
left-handed and right-handed
vector and tensor couplings		 95% C.L. PRL 101, 221801 (2008)
11/25/08
Figures
W′→tb search M(W′(left)→lν,qq) > 731 GeV
M(W′(right)→lν,qq) > 739 GeV
M(W′(right)→qq) > 768 GeV		 95% C.L. PRL 100, 211803 (2008)
5/30/08
Figures
Combination of
DT, new-ME,
and new-BNN		 σ(tb+X,tqb+X) = 4.7 ± 1.3 pb
(3.6 std. dev. significance) 		± 28% PRD 78, 012005 (2008)
7/14/08
Figures
SPIRES TOPCITE=50+
Matrix elements  
σ(tb+X,tqb+X) = 4.8 +1.6 –1.4 pb
 		 +33% –29%
Bayesian neural networks  
σ(tb+X,tqb+X) = 4.4 +1.6 –1.4 pb
 		 +36% –32%
Boosted decision trees σ(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
SPIRES TOPCITE=100+
Matrix elements  
σ(tb+X,tqb+X) = 4.6 +1.8 –1.5 pb
 		 +39% –33%
Bayesian neural networks  
σ(tb+X,tqb+X) = 5.0 ± 1.9 pb
 		 ± 38%
Lepton+jets tgu and tgc FCNC couplings 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
W′→tb search M(W′(right)→lν,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
Cuts s-channel:  σ(tb) < 10.6 pb
t-channel:  σ(tqb) < 11.3 pb		 95% C.L. PRD 75, 092007 (2007)
5/29/07
Figures
(Includes NN result below)
Neural networks s-channel:  σ(tb) < 6.4 pb
t-channel:  σ(tqb) < 5.0 pb		 95% C.L. PLB 622, 265 (2005)
7/21/05
Figures
Plain-english summary
Analysis details
SPIRES TOPCITE=50+

This page created by Ann Heinson
Last update: February 7, 2012