Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/102109
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Type: | Journal article |
Title: | Search for s-channel single top-quark production in proton–proton collisions at √s = 8 TeV with the ATLAS detector |
Other Titles: | Search for s-channel single top-quark production in proton-proton collisions at root s = 8 TeV with the ATLAS detector |
Author: | ATLAS Collaboration, Aad, G. |
Citation: | Physics Letters B: Nuclear Physics and Particle Physics, 2015; 740:118-136 |
Publisher: | Elsevier |
Issue Date: | 2015 |
ISSN: | 0370-2693 1873-2445 |
Statement of Responsibility: | G. Aad … P. Jackson … L. Lee … A. Petridis … N. Soni ... M. White ... et al. (ATLAS Collaboration) |
Abstract: | This Letter presents a search at the LHC for s-channel single top-quark production in proton–proton collisions at a centre-of-mass energy of 8TeV. The analyzeddata set was recorded by the ATLAS detector and corresponds to an integrated luminosity of 20.3fb−1. Selected events contain one charged lepton, large missing transverse momentum and exactly two b-tagged jets. A multivariate event classifier based on boosted decision trees is developed to discriminate s-channel single top-quark events from the main background contributions. The signal extraction is based on a binned maximum-likelihood fit of the output classifier distribution. The analysis leads to an upper limit on the s-channel single top-quark production cross-section of 14.6pb at the 95% confidence level. The fit gives a cross-section of σs=5.0 ±4.3pb, consistent with the Standard Model expectation. |
Keywords: | ATLAS; top-quark; electroweak production; s-Channel |
Rights: | © 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/). Funded by SCOAP3. |
DOI: | 10.1016/j.physletb.2014.11.042 |
Published version: | http://dx.doi.org/10.1016/j.physletb.2014.11.042 |
Appears in Collections: | Aurora harvest 7 Physics publications |
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hdl_102109.pdf | Published version | 1.32 MB | Adobe PDF | View/Open |
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