Observation of s-Channel Production of Single Top Quarks at the Tevatron

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 (2014) Observation of s-Channel Production of Single Top Quarks at the Tevatron. PHYSICAL REVIEW LETTERS, 112 (23). ISSN 0031-9007

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Abstract

We report the first observation of single-top-quark production in the s channel through the combination of the CDF and D0 measurements of the cross section 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 measured cross section is σs = 1.29+0.26 −0.24 pb. The probability of observing a statistical fluctuation of the background to a cross section of the observed size or larger is 1.8 × 10−10, corresponding to a significance of 6.3 standard deviations for the presence of an s-channel contribution to the production of single-top quarks.

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