CDF Blessed Top Group Results for Summmer 2003 |
ttbar cross section measurements |
Cross section in the lepton+jets channel (pretag) using kinematical information: |
Cross section in the dilepton channel using fully reconstructed e,mu |
| Caption | Thumbnails | Caption | Thumbnails |
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| Ht distribution of the dilepton candidate events superimposed with the Ht distribution from tt MC. Ht cut is Ht>200 GeV. | |
Lepton Pt, two entries per event. | |
| Met for the dilepton candidates and tt MC | |
Dphi vs Met distribution of the dilepton data events (symbols) overlapped with the distribution from tt MC dilepton events (yellow dots). The plot is done after all cuts are applied. | |
| Dilepton invariant mass distribution for the candidate events superimposed with the same distribution from tt MC. | |
Jet multiplicity distribution | |
| Jet multiplicity distribution (top not shown, background uncertainty shown instead) | |
Summary table of backgrounds and signal expectations along with the number of observed events in data. | |
| Summary table of backgrounds and signal expectations along with the number of observed events in data for the different jet multiplicity bins after all cuts. | |
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Cross section in the dilepton channel using fully reconstructed lepton plus an isolated track |
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Top mass measurements |
Mass reconstruction in the lepton+jets channel with SVX btag |
| Description | Thumbnails | Description | Thumbnails |
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| Fitted Top Mass. Remember to turn off anti-aliasing (State menu) in ghostview to see the hatching! |
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Background Mass templates. Reconstructed mass distributions for W+jets (mistag) in top-left, Wbb in top-right, s-channel single top in bottom-left, and t-channel single top in bottom-right. |
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| Combined Background Mass template. |
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Pull distributions vs. Top mass. The center of mass pull distribution (left) and the width of mass pull distribution (right) from the pseudo-experiments as a function of the input top mass. Top plots use a symmetrized error, while the bottom plots make use of the reported asymmetric errors. |
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| Expected statistical uncertainties vs. Top mass using mean (top-left), median (top-right), 68% CL (bottom-left), and 90% CL (bottom-right). |
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Expected statistical uncertainty distribution with top mass of 175 GeV. |
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| Expected statistical uncertainty distribution with top mass of 180 GeV. |
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Background Estimate Table | eps |
| Uncertainties due to Jet Energy Scale Table | eps | Uncertainty Summary Table | eps |
Mass reconstruction in the dilepton channel |
| Description | Thumbnails | Description | Thumbnails |
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| Mass distribution for the data |
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Errors for MC (pseudoexperiments) and DATA |
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| Likelihood Fit |
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Table of Reconstructed mass of the 6 events |
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| Table of total systematic errors |
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Final mass estimate |
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| tt templates |
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Bacgkround templates: WW |
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| Background templates:Drell-Yan |
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Background templates: Z-->tau tau |
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Other measurements |
Single Top Cross Section |