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Measurement of the Single-Top-Quark Production Cross Section at CDF

Aaltonen, T; Adelman, J; Akimoto, T; Albrow, MG; Alvarez Gonzalez, B; Amerio, S; Amidei, D; ... Zucchelli, S; + view all (2008) Measurement of the Single-Top-Quark Production Cross Section at CDF. PHYS REV LETT , 101 (25) , Article 252001. 10.1103/PhysRevLett.101.252001. Green open access

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Abstract

We report a measurement of the single-top-quark production cross section in 2.2 fb(-1) of p (p) over bar collision data collected by the Collider Detector at Fermilab at root s = 1.96 TeV. Candidate events are classified as signal-like by three parallel analyses which use likelihood, matrix element, and neural network discriminants. These results are combined in order to improve the sensitivity. We observe a signal consistent with the standard model prediction, but inconsistent with the background-only model by 3.7 standard deviations with a median expected sensitivity of 4.9 standard deviations. We measure a cross section of 2.2(-0.6)(+0.7)(stat + syst) pb, extract the Cabibbo-Kobayashi-Maskawa matrix-element value vertical bar V-tb vertical bar 0.88(-0.12)(+0.13)(stat + syst) +/- 0.07(theory), and set the limit vertical bar V-tb vertical bar > 0.66 at the 95% C.L.

Type: Article
Title: Measurement of the Single-Top-Quark Production Cross Section at CDF
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.101.252001
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.101.252001
Language: English
Additional information: © 2008 The American Physical Society
Keywords: COLLIDER DETECTOR, FERMILAB TEVATRON, COLLISIONS, PHYSICS
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/131651
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