CDFII Top Quark Physics Group Public Page

Approved CDF Top Group Results LEP Electroweak Working Group and Tevatron Electroweak Working Group and D0 Top Group and TeV4LHC workshop

CDF II Top Quark Group Physics Results top quark mass, pair & single production, top quark properties	Color Key
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Latest CDF results and Recent talks by CDF speakers

Archive of conference notes and past results

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CDF Run 2 Top papers - 09/12/2006 24 and counting...
CDF Run 1 Top papers

Information about the CDF Vertex b-tag algorithm

Last updated February 18 2005 with 15% higher b-tag efficiency

Information about the CDF jet energy scale.

Last updated February 22 2005 with about 50% reduction in total uncertainty from previous Run II estimate. This is the majority of the work needed for the world's best top quark mass measurement released by CDF on March 31 2005.
Determination of the Jet Energy Scale at the Collider Detector at Fermilab A. Bhatti et al. Submitted to Nucl. Instr. Meth. A October 18 2005. Accepted 24-May-2006 (NIMA45490) Recieved at Elsevier 30-May-2006. hep-ex/0510047 and online DOI link for NIMA .

Tevatron March 2007 combination of CDF+D0 Run I+II results:
Top quark mass = 170.9 +- 1.8 GeV/c²

Effect on global electroweak fit and Standard Model Higgs boson

Effect on MSSM

CDF measurements (Updated 03/15/2007)	Top quark mass Tevatron combination CDF prospects		CDF and D0 best (Updated 03/15/2007)
Channel	Description (Link to web-page)	Measurement	Integrated Luminosity (pb-1)	Date Approved
Winter '07: Tevatron combination	TeV Combination	170.9 +- 1.1(stat) +- 1.5(syst) GeV/c² 170.9 +- 1.8 GeV/c²	1 fb^-1	03/15/2007 hep-ex/0703034
winter '07: CDF best single measurement in each channel	Combination Future prospects	170.5 +-1.3(stat) +- 1.8(syst) GeV/c² 170.9+-2.3 GeV/c²	~1 fb^-1	03/17/2007 Preliminary Conf. Note 8743
lepton+jets	Matrix Element with in-situ W->jj jet energy scale calibration >=1 Vertex b-tags == 4jets	170.9 +-2.2 (stat+JES) +- 1.4 (syst) GeV/c² 170.9 +- 1.6 (stat) +- 2.0(JES+syst) GeV/c² = 170.9 +- 2.6 GeV/c²	940	07/06/2006 Preliminary Conf. Note 8375
lepton+jets CDF best	Multivariate Method with matrix element >=1 vertex b-tags	172.7 +/-1.8(stat+JES) +/-1.2(syst) GeV/c² Best single measurement in the world!	1.7 fb^-1	09/06/07 Preliminary Conf. Note 9025 Prev. 1 fb^-1 Result
lepton+jets	M^top_reco Template using 3 Best Chi2 Combinations	168.9 +-2.2 (stat) +- 4.2 (syst) GeV/c²	1000	12/14/2006 Preliminary Conf. Note 8669
lepton+jets	M^top_recowith in-situ W->jj jet energy scale calibration (JES) 1 or 2 Vertex b-tags	171.6 +- 2.1 (stat+JES) +- 1.1(syst) GeV/c²	1.7 fb^-1	08/08/2007 Preliminary Conf. Note 8949 680 pb^-1Conf. Note 318 pb^-1 result PRL 96 022004 PRD 73 032003
lepton+jets	L_xy of bjet >=1 Vertex b-tags	blessed: 183.9 +15.7-13.9 (stat) +- 5.6 (syst) GeV/c² PRD: 180.7 +15.5-13.4 (stat) +- 8.6 (syst) GeV/c²	695	02/16/2006 Prelim. Conf. Note 8133 PRD 75 071102
lepton+jets	Dynamic Likelihood >=1 Vertex b-tags == 4 jets	173.2 + 2.6 -2.4 (stat) +- 3.2 (syst) GeV/c²	318	05/26/2005 FINAL! PRL 96 022004 PRD 73 092002
lepton+jets	Multivariate >=1 Vertex b-tags	179.6 +6.4-6.3 (stat) +- 6.8 (syst) GeV/c²	162	05/13/2004 Preliminary Conf. Note 7102
dilepton e-e,e-mu,mu-mu CDF Best	Matrix Element	170.4 +- 3.1 (stat) +- 3.0 (syst) GeV/c²	1.8 fb^-1	08/08/2007 Preliminary Conf. Note 8951 1 fb^-1 Result PRD 75 031105 340 pb^-1 Result PRL 96 152002 PRD 74 032009
dilepton e-e,e-mu,mu-mu	Matrix Element as above with Vertex b-tags	167.3 + 4.6 (stat) +- 3.8 (syst) GeV/c²	955	07/20/2006 Preliminary Conf. Note 8401
dilepton e-e,e-mu,mu-mu	M_reco template + &nu weighting	172.0 +5.0 -4.9(stat) +/- 3.6(syst) GeV/c²	1.8 fb^-1	08/08/2007 Preliminary Conf. Note 8955
dilepton e-e,e-mu,mu-mu	Lepton P_T	156 +/- 20(stat) +/- 4.6(syst) GeV/c²	1.8 fb^-1	08/08/2007 Preliminary Conf. Note 8959
dilepton e-e,e-mu,mu-mu	Dynamic Likelihood Method	166.6 + 7.3 -6.7 (stat) +- 3.2 (syst) GeV/c²	340	12/1/2005
dilepton e-e,e-mu,mu-mu	Combination	167.9 +- 5.2 (stat) +- 3.7 (syst) GeV/c²	340	11/03/2005 FINAL! PRL 96 152002
dilepton lepton+isolated track	&nu weighting	170.7 + 6.9- 6.5 (stat) +- 4.6 (syst) GeV/c²	359	06/28/2005 FINAL! PRL 96 152002 PRD 73 112006
dilepton e-e,e-mu,mu-mu	M_reco template + ttbar P_z	169.7 + 5.2- 4.9 (stat) +- 3.1 (syst) GeV/c²	1.2 fb^-1	04/26/2007 Preliminary Conf. Note 8803 Previous 1020pb^-1 result 360pb^-1 result PRL 96 152002 PRD 73 112006
dilepton e-e, e-mu, mu-mu	M_reco template + ttbar Pz with Cross Section constraint	170.7 +4.2 -3.9(stat) +- 2.6(syst) +- 2.4(theory) GeV/c²	1.2 fb^-1	06/14/2007 Preliminary Conf. Note 8869
dilepton e-e,e-mu,mu-mu	M_reco template + &phi of &nu₁ and &nu₂	169.7 + 8.9 -9.0 (stat) +- 4.0 (syst) GeV/c²	340	07/14/2005 FINAL! PRL 96 152002 PRD 73 112006
all hadronic	Ideogram Method	177.1 +-4.9 (stat) +- 4.7 (syst) GeV/c²	310 pb^-1	3/30/2006 Preliminary Conf. Note 8233
all hadronic	Template Method	174.0 +-2.2 (stat) +- 4.8 (syst) GeV/c²	1020 pb^-1	7/23/2006 Preliminary Conf. Note 8420
all hadronic CDF best	Matrix Element Assisted Template Method	171.1 +-3.7 (stat+JES) +-2.1 (syst) GeV/c²	943 pb^-1	1/4/2007 Preliminary Conf. Note 8709
met + jets (orthogonal to lepton+jets, high acceptance for taus)	H_T Template Fit	172.3 ^+10.8_-9.6 (stat) +- 10.8 (syst) GeV/c²	310 pb^-1	10/12/2006 Conf.Note 8573 PRD75, 111103(R),2007
Top quark pair production: cross-section Results quoted here for an assumed top quark mass of 175 GeV/c² (last updated 04/30/2007 - combo still for 760 pb^-1 and mass dependence set at 172.0+-2.7 GeV) Summary (eps) Mass dependence (eps) sqrt{s} dependence (eps)
Combination	all channels	7.3 +- 0.5 (stat) +- 0.6 (syst) +- 0.4 (lumi) pb	760	02/23/2006 Preliminary Conf. Note 8148
dilepton e-e, e-mu, mu-mu CDF best	two identified leptons	6.2 +- 1.1(stat) +- 0.7(syst) +- 0.4(lumi) pb	1.2 fb^-1	04/26/2007 Preliminary Conf. Note 8802 Previous 750 pb^-1 Result
dilepton	lepton+isolated track	8.3 +- 1.3(stat) +- 0.7(syst) +- 0.5(lumi) pb	1.07 fb^-1	06/21/2007 Preliminary Conf. Note 8770 Previous 360 pb^-1 Result
dilepton	lepton+isolated track + b-tag	10.1 +- 1.8(stat) +- 1.1(syst) +- 0.6(lumi) pb	1.0 fb^-1	7/05/2007 Preliminary Conf. Note 8912
dilepton	inclusive	8.5 + 2.6 - 2.2 (stat) +0.7-0.3 (syst) pb for top mass of 178 GeV	360	04/20/2006 Conf.Note8146 hep-ex/xxxxxx PRD-RC
lepton+jets	neural network (fit)	6.0 +- 0.6 (stat) +- 0.9 (syst) pb	760	02/14/2006 Preliminary Conf. Note 8092
lepton+jets CDF best	Secondary vertex b-tag	8.2 +- 0.5(stat) +- 0.8(syst) +- 0.5(lumi) pb	1.12 fb^-1	04/26/2007 Preliminary Conf. Note 8795 Previous 695 pb^-1 Result ~300 pb^-1 Result, PRL 97 082004
lepton+jets	Secondary vertex b-tag + NN-btagger	8.5 +- 0.6 (stat) +-1.0 (syst) pb cross check of the Secondary Vertex tag xs	695	04/20/2006 Pleriminary Conf. Note 8272
lepton+jets	Jet probability b-tag	8.9 +- 1.0 (stat) +- 1.1 (syst) pb (mtop= 178 GeV)	318	FINAL! 08/04/2005 PRL 97 082004 PRD 74, 072006 & hep-ex of PRD
lepton+jets	Vertex b-tag + lead jet Et (fit)	6.0 +- 1.6 (stat) +- 1.2 (syst) pb	162	FINAL 09/10/2004 PRD 71, 072005
lepton+jets	Soft muon b-tag	7.8 + 1.7 (stat) +1.1 - 1.0 (syst) pb	760 pb^-1	9/28/06 Preliminary Conf. Note 8565 ~200 pb^-1 Result: PRD 72, 032002
MET+jets	Vertex b-tag	6.1 +- 1.2 (stat) + 0.9 - 0.7 (syst) pb	311	FINAL! 03/23/2006 PRL 96 202002
all-hadronic	Vertex b-tag	8.3 +- 1.0 (stat) + 2.0 - 1.5 (syst) +- 0.5 (lum) pb	1020	07/20/2006 Conf.Note8402 hep-ex/07063790v1 Submitted to PRD 300 pb^-1 Result: hep-ex & PRD 74 072005
W+jets
lepton+jets	xs of c-jet with W boson in W+1,2 jet	28.5 +/- 8.2(stat) +4.1 -4.4(sys) +/-1.7(lum) pb	1.8 fb^-1	08/09/2007 Preliminary Conf. Note 8962
lepton+jets	xs of b-jet with W boson in W+1,2 jet	0.90 +- 0.20 (stat) +- 0.26 (syst) pb	695	07/06/2006 Preliminary Conf. Note 8410
lepton+jets	W+jets with Vertex and soft muon b-tags	No discrepancy seen	162	05/26/2005 FINAL! PRD 73 051101
Search for Single Top Quark production Future
lepton+jets	Neural Network	s+t channel <2.6 pb @ 95% C.L. t-channel = 0.2 +1.1 -0.2 pb s-channel = 0.7 +1.5 -0.7 pb (2-d most probable values)	955 pb^-1	12/14/2006 Preliminary Conf. Note 8677 03/16/2006 Previous Conf. Note 8185 with 695 pb^-1
lepton+jets	Multivariate Likelihood Function	s+t channel = 2.7 +1.3 -1.1 pb t-channel = 1.3 +1.2 -1.0 pb s-channel = 1.1 +1.4 -1.1 pb Obs p-value = 0.3% (2.7 sigma) \|Vtb\| = 0.97 +0.21 -0.19(exp) +/- 0.07(theory)	1.5 fb^-1	08/09/2007 Conf. Note 8964 1 fb^-1 Conf. Note 695 pb^-1 Conf. Note
lepton+jets	Matrix Element Discriminant	s+t channel = 3.0 +1.2 -1.1 pb Obs p-value(1-CL_b)=0.09% (3.1 sigma) \|Vtb\| = 1.02 +/- 0.18(exp) +/- 0.07(theory)	1.5 fb^-1	08/09/2007 Conf. Note 8968 1 fb^-1 Conf. Note
lepton+jets	Compatibility Studies for Single Top Results	Compatibility of NN (both 1D and 2D), LF and ME data results is 0.65%	955 pb^-1	2/15/2007 Conference Note coming soon
lepton+jets	Search for W'->tb using single top sample	M_W'>760 GeV/c² for M_W' > M_{&nu_R} and M_W'>790 GeV/c² for M_W' < M_{&nu_R} at 95% CL	955 pb^-1	3/21/2007 Preliminary Conf. Note 8747
Top quark production and decay properties
Z+jets	Search for FCNC t->Zq	BR(t->Zq) < 10.6% at 95% C.L.	1.12 fb^-1	6/28/2007 Preliminary Conf. Note 8888
lepton+jets	Search for resonances in ttbar mass spectrum, template method	95% C.L. on &sigma ×BR(X->ttbar)	955 pb^-1	10/13/2006 Preliminary Conf. Note 8675
lepton+jets	Search for resonances in ttbar mass spectrum, matrix element + template	95% C.L. on &sigma ×BR(X->ttbar)	680 pb^-1	02/14/2006 Preliminary Conf. Note 8087
lepton+jets	Search for a Massive t' Quark	t' mass > 256 GeV at 95% CL	760 pb^-1	03/16/2006 Preliminary Conf. Note 8495 previous result Note 8003
lepton+jets	Top Quark Width	&Gamma_top < 12.7 GeV at 95% C.L.	1 fb^-1	08/02/2007 Preliminary Conf. Note 8953
lepton+jets	Top Quark Lifetime	cτ_top < 52.5 μm @ 95% C.L.	318	02/14/2006 Preliminary Conf. Note 8104
dilepton	Search for Anomalous Kinematics	1.0-4.5%	194	FINAL 12/10/2004 PRL 95 022001
lepton+tau	t->&tau &nuq	5 obs vs 2.7+-0.4 bkg p-value 15%, or 1sigma excess	350	4/20/2006 Preliminary Conf. Note 8376 previous result PLB 639 172
dilepton, lepton+jets, single and double Vertex b-tags	BR(t->Wb)/BR(t->Wq)	1.12 + 0.21 - 0.19 (stat) + 0.17 -0.13 (syst) > 0.61 @ 95% C.L.	162	FINAL 05/27/2005 PRL 95, 102002
dilepton, lepton+tau, lepton+jets single and double Vertex b-tags	Search for Charged Higgs in top decays	Limits on BR(t->H⁺b)	194,162	FINAL 10/24/2005 PRL 96, 042003
lepton+jets	Top Production Mechanism using low Pt Tracks	0.07+-0.14(stat)+-0.07(syst) for xs(gg->ttbar)/xs(ppbar->ttbar)	950 pb^-1	03/05/2007 Preliminary Conf. Note 8724 (updated 07/2007) Previous 330 pb^-1 Result
lepton+jets	Top Production Mechanism using a Neural Network	Fraction of ttbar events produced by gluon fusion < 0.33 at 68% CL	955 pb^-1	05/10/2007 Preliminary Conf. Note 8811 Previous 695pb^-1 Result
lepton+jets, dilepton	Top Charge	Observed p-value = 0.31 Exclude top charge of -4/3 with 87% C.L. Bayes Factor value very strongly favors SM	1.5 fb^-1	08/09/2007 Preliminary Conf. Note 8967 Prev. 1 fb^-1 result
lepton+jets	Charge Asymmetry A_FB	A_FB = 0.28 +/- 0.13(stat) +/-0.05(syst)	1.7 fb^-1	08/09/2007 Preliminary Conf. Note 8963
W Helicity Plain English explanation
lepton+jets	cos&theta *	1-parameter fit: F₀= 0.57 +/-0.11(stat) +/-0.04 (syst) F₊= -0.04 +/-0.04(stat) +/-0.03(syst) F₊ < 0.07 @ 95% C.L. 2-parameter fit: F₀= 0.61 +/-0.20(stat) +/-0.03(syst) F₊= -0.02 +/- 0.08(stat) +/-0.03(syst)	1.7 fb^-1	08/09/2007 Preliminary Conf. Note 8971 Prev. 1 fb^-1 result
dilepton, lepton+jets (Run II)	M_lb²	F₊< 0.09 @ 95% C.L.	750	05/11/2006 Preliminary Conf. Note 8280 PRL 98, 072001(2007) hep-ex/0608062
lepton+jets	cos&theta * (full reco)	1-parameter fit: F₀= 0.65 +/-0.10(stat) +/-0.06(syst) F₊= 0.01 +/-0.05(stat) +/-0.03(syst) F₊ < 0.12 @ 95% C.L. 2-parameter fit: F₀= 0.38 +/-0.22(stat) +/-0.07(syst) F₊= 0.15 +/-0.10(stat) +/-0.04(syst)	1.7 fb^-1	07/19/2007 Preliminary Conf. Note 8938 Previous 1 fb^-1 result 320 pb^-1 publication hep-ex/0612011
lepton+jets	Combined cos&theta * and Lepton Pt spectrum	F₀= 0.74 +0.22 -0.34 (stat+syst) F₊ < 0.27 @ 95% C.L.	162	FINAL 11/08/2005 PRD 73 111103
dilepton, lepton+jets Run I	M_lb²	F₊< 0.18 @ 95% C.L.	109	FINAL 05/23/2004 PRD 71, 031101 (2005)