Observation of Electroweak Single Top-Quark Production

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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 . , 10.1103/PhysRevLett.103.092002

Title: Observation of Electroweak Single Top-Quark Production
Author: Aaltonen, Timo; Mehtälä, Petteri; Mäki, Tuula; Orava, Risto; Saarikko, Heimo; Österberg, Kenneth; CDF collaboration
Contributor: University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
Belongs to series: Physical Review Letters
ISSN: 0031-9007
Abstract: We report the first observation of single top quark production using 3.2 fb^-1 of pbar p collision data with sqrt{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 m_t=175 GeV/c^2, we measure a cross section of 2.3 +0.6 -0.5 (stat+syst) pb, extract the CKM matrix element value |V_{tb}|=0.91 +-0.11 (stat+syst) 0.07(theory), and set the limit |V_{tb}|>0.71 at the 95% C.L.
Peer review status: Peer reviewed
URI: http://hdl.handle.net/10138/24478
Date: 2009
Subject: hep-ex
114 Physical sciences


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