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Tevatron combination of single-top-quark cross sections and determination of the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element Vtb

Abstract : We present the final combination of CDF and D0 measurements of cross sections 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−1 per experiment. The t-channel cross section is measured to be σt=2.25+0.29−0.31 pb. We also present the combinations of the two-dimensional measurements of the s- vs. t-channel cross sections and of the s+t channel cross section measurement resulting in σs+t=3.30+0.52−0.40 pb, without assuming the standard-model value for the ratio σs/σt. The resulting value of the magnitude of the top-to-bottom quark coupling is |Vtb| = 1.02+0.06−0.05, corresponding to |Vtb|>0.92 at the 95% C.L.
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http://hal.in2p3.fr/in2p3-01133058
Contributor : Sabine Starita <>
Submitted on : Wednesday, March 18, 2015 - 2:30:48 PM
Last modification on : Thursday, November 19, 2020 - 12:59:12 PM

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T. Aaltonen, J.-F. Grivaz, T. Guillemin, M. Jaffré, P. Pétroff, et al.. Tevatron combination of single-top-quark cross sections and determination of the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element Vtb. Physical Review Letters, American Physical Society, 2015, 115, pp.152003. ⟨10.1103/PhysRevLett.115.152003⟩. ⟨in2p3-01133058⟩

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