Aad, G;
Abbott, B;
Abdallah, J;
Abdinov, O;
Abeloos, B;
Aben, R;
Abolins, M;
... Zwalinski, L; + view all
(2016)
Search for single production of vector-like quarks decaying into Wb in pp collisions at root s=8 TeV with the ATLAS detector.
The European Physical Journal C
, 76
(8)
, Article 442. 10.1140/epjc/s10052-016-4281-8.
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Abstract
A search for singly produced vector-like Q quarks, where Q can be either a T quark with charge +2/3 or a Y quark with charge −4/3, is performed in proton– proton collisions recorded with the ATLAS detector at the LHC. The dataset corresponds to an integrated luminosity of 20.3 fb−1 and was produced with a centre-of-mass energy of √s = 8 TeV. This analysis targets Q → W b decays where the W boson decays leptonically. A veto on massive largeradius jets is used to reject the dominant tt ¯ background. The reconstructed Q-candidate mass, ranging from 0.4 to 1.2 TeV, is used in the search to discriminate signal from background processes. No significant deviation from the Standard Model expectation is observed, and limits are set on the Q → W b cross-section times branching ratio. The results are also interpreted as limits on the QWb coupling and the mixing with the Standard Model sector for a singlet T quark or a Y quark from a doublet. T quarks with masses below 0.95 TeV are excluded at 95 % confidence level, assuming a unit coupling and a BR(T → W b) = 0.5, whereas the expected limit is 1.10 TeV.
| Type: | Article |
|---|---|
| Title: | Search for single production of vector-like quarks decaying into Wb in pp collisions at root s=8 TeV with the ATLAS detector |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1140/epjc/s10052-016-4281-8 |
| Publisher version: | http://doi.org/10.1140/epjc/s10052-016-4281-8 |
| Language: | English |
| Additional information: | © CERN for the benefit of the ATLAS collaboration 2016. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
| Keywords: | Science & Technology, Physical Sciences, Physics, Particles & Fields, Physics, COMPOSITE HIGGS, PARTON DISTRIBUTIONS, VACUUM MISALIGNMENT, BREAKING, PHENOMENOLOGY, MODELS, SU(2), MASS, LHC |
| 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/1508607 |
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