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 |V(tb)| 0.88(-0.12)(+0.13)(stat + syst) +/- 0.07(theory), and set the limit |V(tb)| > 0.66 at the 95% C.L.

T., A., J., A., T., A., M. G., A., B. A., G., S., A., et al. (2008). Measurement of the Single-Top-Quark Production Cross Section at CDF. PHYSICAL REVIEW LETTERS, 101(25), 252001-1-252001-8 [10.1103/PhysRevLett.101.252001].

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

CIOCCI, MARIA AGNESE;
2008-01-01

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 |V(tb)| 0.88(-0.12)(+0.13)(stat + syst) +/- 0.07(theory), and set the limit |V(tb)| > 0.66 at the 95% C.L.
2008
T., A., J., A., T., A., M. G., A., B. A., G., S., A., et al. (2008). Measurement of the Single-Top-Quark Production Cross Section at CDF. PHYSICAL REVIEW LETTERS, 101(25), 252001-1-252001-8 [10.1103/PhysRevLett.101.252001].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/37055
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