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

• Published in: Physical review letters 2015-10, Vol.115 (15)
• Main Authors: Aaltonen, T., Grivaz, J.-F., Guillemin, T., Jaffré, M., Pétroff, P., Sajot, G., Stark, J., Grenier, G., Kurca, T., Lebrun, P., Cousinou, M.-C., Duperrin, A., Geng, W., Kajfasz, E., Kermiche, S., Nagy, E., Osman, N.
• Format: Article
• Language: English
• Subjects: High Energy Physics - Experiment; Physics; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/PhysRevLett.115.152003

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.