Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/124255
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dc.contributor.author | Aad, G. | - |
dc.contributor.author | Abbott, B. | - |
dc.contributor.author | Abbott, D.C. | - |
dc.contributor.author | Abed Abud, A. | - |
dc.contributor.author | Abeling, K. | - |
dc.contributor.author | Abhayasinghe, D.K. | - |
dc.contributor.author | Abidi, S.H. | - |
dc.contributor.author | AbouZeid, O.S. | - |
dc.contributor.author | Abraham, N.L. | - |
dc.contributor.author | Abramowicz, H. | - |
dc.contributor.author | Abreu, H. | - |
dc.contributor.author | Abulaiti, Y. | - |
dc.contributor.author | Acharya, B.S. | - |
dc.contributor.author | Achkar, B. | - |
dc.contributor.author | Adachi, S. | - |
dc.contributor.author | Adam, L. | - |
dc.contributor.author | Adam Bourdarios, C. | - |
dc.contributor.author | Adamczyk, L. | - |
dc.contributor.author | Adamek, L. | - |
dc.contributor.author | Adelman, J. | - |
dc.contributor.author | et al. | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | Physics Letters B: Nuclear Physics and Particle Physics, 2020; 800:1-21 | - |
dc.identifier.issn | 1873-2445 | - |
dc.identifier.issn | 1873-2445 | - |
dc.identifier.uri | http://hdl.handle.net/2440/124255 | - |
dc.description.abstract | A search for flavour-changing neutral current (FCNC) events via the coupling of a top quark, a photon, and an up or charm quark is presented using 81 fb−1of proton–proton collision data taken at a centre-of-mass energy of 13 TeV with the ATLAS detector at the LHC. Events with a photon, an electron or muon, a b-tagged jet, and missing transverse momentum are selected. A neural network based on kinematic variables differentiates between events from signal and background processes. The data are consistent with the background-only hypothesis, and limits are set on the strength of the tqγcoupling in an effective field theory. These are also interpreted as 95% CL upper limits on the cross section for FCNC tγproduction via a left-handed (right-handed) tuγcoupling of 36 fb (78 fb) and on the branching ratio for t→γuof 2.8 ×10−5(6.1 ×10−5). In addition, they are interpreted as 95% CL upper limits on the cross section for FCNC tγproduction via a left-handed (right-handed) tcγcoupling of 40 fb (33 fb) and on the branching ratio for t→γcof 22 ×10−5(18 ×10−5). | - |
dc.description.statementofresponsibility | G. Aad, B. Abbott, D.C. Abbott, A. Abed Abud ... Paul Jackson ... Abhishek Sharma ... et al. (The Atlas Collaboration) | - |
dc.language.iso | en | - |
dc.publisher | Elsevier | - |
dc.rights | © 2019 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP³ | - |
dc.source.uri | http://dx.doi.org/10.1016/j.physletb.2019.135082 | - |
dc.title | Search for flavour-changing neutral currents in processes with one top quark and a photon using 81 fb¯¹ of pp collisions at √s=13 TeV with the ATLAS experiment | - |
dc.title.alternative | Search for flavour-changing neutral currents in processes with one top quark and a photon using 81 fb -bar(1) of pp collisions at root s=13 TeV with the ATLAS experiment | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1016/j.physletb.2019.135082 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Jackson, P. [0000-0002-0847-402X] | - |
dc.identifier.orcid | White, M. [0000-0001-5474-4580] | - |
Appears in Collections: | Aurora harvest 4 Physics publications |
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File | Description | Size | Format | |
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hdl_124255.pdf | Published version | 1.44 MB | Adobe PDF | View/Open |
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