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Observation of Electroweak Single Top-Quark Production

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Title: Observation of Electroweak Single Top-Quark Production
Author: Aaltonen, Timo; Mehtälä, Petteri; Mäki, Tuula; Orava, Risto; Saarikko, Heimo; Österberg, Kenneth; CDF collaboration
Citation: Aaltonen , T , Mehtälä , P , Mäki , T , Orava , R , Saarikko , H , Österberg , K & CDF collaboration 2009 , ' Observation of Electroweak Single Top-Quark Production ' , Physical Review Letters , vol 103 , no. 9 , pp. 092002 .
Belongs to series: Physical Review Letters
ISSN: 0031-9007
Abstract: We report the observation of single top-quark production using 3.2  fb-1 of pp̅ collision data with √s=1.96  TeV collected by the Collider Detector at Fermilab. The significance of the observed data is 5.0 standard deviations, and the expected sensitivity for standard model production and decay is in excess of 5.9 standard deviations. Assuming mt=175  GeV/c2, we measure a cross section of 2.3-0.5+0.6(stat+syst)  pb, extract the CKM matrix-element value |Vtb|=0.91±0.11(stat+syst)±0.07(theory), and set the limit |Vtb|>0.71 at the 95% C.L.
Peer review status: Peer reviewed
URI: http://hdl.handle.net/10138/24478
Date: 2009

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