Single top quark production and Vtb CKM matrix element measurement in high energy e+e- collisions

Fermi National Accelerator Laboratory

We report a combination of the CDF and D0 measurements of the inclusive single top quark production cross section in the sand t-channels, σs+t, in pp̄ collisions at a center of mass energy of 1.96 TeV. The total integrated luminosity included in CDF’s analysis is 3.2 fb−1 and D0’s analysis has 2.3 fb−1. A Bayesian analysis is used to extract the cross section from the distributions of multivaria...

Measurement of the Electroweak Top Quark Production Cross Section and the CKM Matrix Element Vtb with the DØ Experiment

Combination of Single Top Quark Production Results from CDF

Recently, the CDF experiment at the Fermilab Tevatron has used complementary methods to make multiple measurements of the singly produced top quark cross section. All analyses use the same dataset with more than 2 fb of CDF data and event selection based on W + 2 or W + 3 jet events with at least one b-tagged jet. However, due to differences in analysis techniques these results are not fully co...

Evidence for Single Top Quark Production at D0

We present evidence for the production of single top quarks at the Fermilab Tevatron pp̄ collider. Using a 0.9 fb dataset collected with D0 detector, the analysis is performed in the electron+jets and muon+jets decay modes, taking special care in modeling the large backgrounds, applying a new powerful b-quark tagging algorithm and using three multivariate techniques to extract the small signal. ...

Fermi National Accelerator Laboratory

We present the final combinations of CDF and D0 measurements of the cross section for single-top-quark production in proton-antiproton collisions at a center-of-mass energy of 1.96 TeV. The data correspond to total integrated luminosities of up to 9.7 fb per experiment. The t-channel cross section is measured to be σt = 2.25 +0.29 −0.31 pb. We also present the simultaneously measured sand t-cha...