Aad, G;
Abbott, B;
Abdallah, J;
Abdinov, O;
Aben, R;
Abolins, M;
AbouZeid, OS;
... ATLAS Collaboration, .; + view all
(2016)
Evidence for single top-quark production in the s-channel in proton-proton collisions at root s=8 TeV with the ATLAS detector using the Matrix Element Method.
Physics Letters B
, 756
pp. 228-246.
10.1016/j.physletb.2016.03.017.
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Abstract
This Letter presents evidence for single top-quark production in the s -channel using proton–proton collisions at a centre-of-mass energy of 8 TeV with the ATLAS detector at the CERN Large Hadron Collider. The analysis is performed on events containing one isolated electron or muon, large missing transverse momentum and exactly two b -tagged jets in the final state. The analysed data set corresponds to an integrated luminosity of 20.3 fb−1. The signal is extracted using a maximum-likelihood fit of a discriminant which is based on the matrix element method and optimized in order to separate single-top-quark s-channel events from the main background contributions, which are top-quark pair production and W boson production in association with heavy-flavour jets. The measurement leads to an observed signal significance of 3.2 standard deviations and a measured cross-section of View the MathML source, which is consistent with the Standard Model expectation. The expected significance for the analysis is 3.9 standard deviations.
| Type: | Article |
|---|---|
| Title: | Evidence for single top-quark production in the s-channel in proton-proton collisions at root s=8 TeV with the ATLAS detector using the Matrix Element Method |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.physletb.2016.03.017 |
| Publisher version: | http://dx.doi.org/10.1016/j.physletb.2016.03.017 |
| Language: | English |
| Additional information: | Copyright © 2016 CERN for the benefit of the ATLAS Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1477938 |
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