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Author Aaltonen, T.
Source arXiv.org
Content type Text
File Format PDF
Date of Submission 2008-09-15
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Physics
Subject Keyword High Energy Physics - Experiment ♦ physics:hep-ex
Abstract We report a measurement of the single top quark production cross section in 2.2 ~fb-1 of p-pbar collision data collected by the Collider Detector at Fermilab at sqrt{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 +0.7 -0.6(stat+sys) pb, extract the CKM matrix element value V_{tb} =0.88 +0.13 -0.12 (stat+sys) +- 0.07(theory), and set the limit V_{tb} >0.66 at the 95% C.L.
Description Reference: Phys.Rev.Lett.101:252001,2008
Educational Use Research
Learning Resource Type Article
Organization CDF Collaboration
Page Count 7


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