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Title
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Measurement of the single-top-quark production cross section at CDF
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Author
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Institution/Organisation
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CDF Collaboration
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Abstract
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| We report a measurement of the single-top-quark production cross section in 2.2 fb-1 of pp̅ collision data collected by the Collider Detector at Fermilab at √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 |Vtb|=0.88-0.12+0.13(stat+syst)±0.07(theory), and set the limit |Vtb|>0.66 at the 95% C.L. |
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Language
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English
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Source (journal)
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Physical review letters. - New York, N.Y., 1958, currens
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Publication
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New York, N.Y.
:
American Physical Society
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2008
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ISSN
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0031-9007
[print]
1079-7114
[online]
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Volume/pages
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101
:25
(2008)
, p. 252001,1-252001,8
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ISI
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000261891200017
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Full text (Publisher's DOI)
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Full text (open access)
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