Fermi National Accelerator Laboratory
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چکیده
We present the final combinations of CDF and D0 measurements of the cross section for single-top-quark production in proton-antiproton collisions at a center-of-mass energy of 1.96 TeV. The data correspond to total integrated luminosities of up to 9.7 fb per experiment. The t-channel cross section is measured to be σt = 2.25 +0.29 −0.31 pb. We also present the simultaneously measured sand t-channel cross sections and the s+t combined cross section measurement resulting in σs+t = 3.30 +0.52 −0.40 pb, without assuming the SM ratio of σs/σt. The modulus of the CKM matrix element obtained from the s+ t-channel measurement is |Vtb| = 1.02 −0.05 and its value is used to set a lower limit of |Vtb| > 0.92 at 95% C.L. The Tevatron Electroweak Working Group can be contacted at [email protected]. More information can be found at http://tevewwg.fnal.gov.
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