| Resumen |
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 σ t =2.25 +0.29 −0.31 pb. 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 σ s+t =3.30 +0.52 −0.40 pb, without assuming the standard model value for the ratio σ s /σ t. The resulting value of the magnitude of the top-to-bottom quark coupling is |V tb |=1.02 +0.06 −0.05, corresponding to |V tb |>0.92 at the 95% C.L. |
