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

Aaltonen, T. and Abazov, V. M. and Abbott, B. and Acharya, B. S. and Adams, M. and Adams, T. and Agnew, J. P. and Alexeev, G. D. and Alkhazov, G. and Alton, A. and Amerio, S. and Amidei, D. and Anastassov, A. and Annovi, A. and Antos, J. and Apollinari, G. and Appel, J. A. and Arisawa, T. and Artikov, A. and Asaadi, J. and Ashmanskas, W. and Askew, A. and Atkins, S. and Auerbach, B. and Augsten, K. and Aurisano, A. and Avila, C. and Azfar, F. and Badaud, F. and Badgett, W. and Nagai, Yoshikazu (2015) Tevatron Combination of Single-Top-Quark Cross Sections and Determination of the Magnitude of the Cabibbo-Kobayashi-Maskawa Matrix Element V-tb. PHYSICAL REVIEW LETTERS, 115 (15). ISSN 0031-9007

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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 section. In addition, we give the combination 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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