EPJ Web of Conferences
Volume 49, 2013HCP 2012 – Hadron Collider Physics Symposium 2012
|Number of page(s)||5|
|Published online||20 May 2013|
Single top-quark production measurements with ATLAS at the LHC
Laboratoire de Physique Subatomique et de Cosmologie, Université Joseph Fourier and CNRS/IN2P3 and Institut National Polytechnique de Grenoble, Grenoble, France
We present cross-section measurements of single top-quark production in the t-channel and associated Wt production modes using pp collision data recorded with the ATLAS detector at the LHC. The t-channel total cross-section is measured at √s = 7 TeV and at √s = 8 TeV with an integrated luminosity of 1.04 fb−1 and 5.8 fb−1, respectively. The t-channel top-quark and top-antiquark production cross sections and their ratio are also measured at 7 TeV with 4.7 fb−1 of data. Evidence for the Wt associated production is found at 7 TeV in the dileptonic channel using a luminosity of 2.05 fb−1. The measured cross-sections as well as the top-antitop ratio are in good agreement with the Standard Model predictions. The coupling strength |Vtb| is determined from the ratio of the measured to the theoretically predicted cross sections assuming that |Vts| and |Vtd| are small. The extracted values are all compatible with the Standard Model and with previous measurements.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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