Tevatron Combination of Single-Top-Quark Cross Sections and Determination of the Magnitude of the Cabibbo-Kobayashi-Maskawa Matrix Element Vtb

T. Aaltonen et al. (CDF Collaboration, D0 Collaboration)
Phys. Rev. Lett. 115, 152003 – Published 7 October 2015

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 9.7fb1 per experiment. The t-channel cross section is measured to be σt=2.250.31+0.29pb. We also present the combinations of the two-dimensional measurements of the s- vs t-channel cross section. In addition, we give the combination of the s+t channel cross section measurement resulting in σs+t=3.300.40+0.52pb, 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|=1.020.05+0.06, corresponding to |Vtb|>0.92 at the 95% C.L.

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  • Received 19 March 2015

DOI:https://doi.org/10.1103/PhysRevLett.115.152003

© 2015 American Physical Society

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Vol. 115, Iss. 15 — 9 October 2015

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