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Article: Search for flavour-changing neutral currents in processes with one top quark and a photon using 81fb−1 of pp collisions at √s=13 TeV with the ATLAS experiment
Title | Search for flavour-changing neutral currents in processes with one top quark and a photon using 81fb−1 of pp collisions at √s=13 TeV with the ATLAS experiment |
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Authors | |
Keywords | Collisions Jets Proton–proton collisions |
Issue Date | 2020 |
Publisher | Elsevier: SCOAP3. The Journal's web site is located at http://www.elsevier.com/locate/physletb |
Citation | Physics Letters B, 2020, v. 800, p. 135082:1-135082:21 How to Cite? |
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−1 of 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 tqγ coupling in an effective field theory. These are also interpreted as 95% CL upper limits on the cross section for FCNC tγ production via a left-handed (right-handed) tuγ coupling of 36 fb (78 fb) and on the branching ratio for t→γu of 2.8×10−5 (6.1×10−5). In addition, they are interpreted as 95% CL upper limits on the cross section for FCNC tγ production via a left-handed (right-handed) tcγ coupling of 40 fb (33 fb) and on the branching ratio for t→γc of 22×10−5 (18×10−5). © 2019 The Author(s) |
Persistent Identifier | http://hdl.handle.net/10722/280385 |
ISSN | 2023 Impact Factor: 4.3 2023 SCImago Journal Rankings: 1.593 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | LO, CY | - |
dc.contributor.author | Paredes Hernandez, D | - |
dc.contributor.author | Salvucci, A | - |
dc.contributor.author | Tu, Y | - |
dc.contributor.author | The ATLAS Collaboration | - |
dc.contributor.author | Pizzimento, L | - |
dc.date.accessioned | 2020-02-07T07:40:16Z | - |
dc.date.available | 2020-02-07T07:40:16Z | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | Physics Letters B, 2020, v. 800, p. 135082:1-135082:21 | - |
dc.identifier.issn | 0370-2693 | - |
dc.identifier.uri | http://hdl.handle.net/10722/280385 | - |
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−1 of 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 tqγ coupling in an effective field theory. These are also interpreted as 95% CL upper limits on the cross section for FCNC tγ production via a left-handed (right-handed) tuγ coupling of 36 fb (78 fb) and on the branching ratio for t→γu of 2.8×10−5 (6.1×10−5). In addition, they are interpreted as 95% CL upper limits on the cross section for FCNC tγ production via a left-handed (right-handed) tcγ coupling of 40 fb (33 fb) and on the branching ratio for t→γc of 22×10−5 (18×10−5). © 2019 The Author(s) | - |
dc.language | eng | - |
dc.publisher | Elsevier: SCOAP3. The Journal's web site is located at http://www.elsevier.com/locate/physletb | - |
dc.relation.ispartof | Physics Letters B | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.subject | Collisions | - |
dc.subject | Jets | - |
dc.subject | Proton–proton collisions | - |
dc.title | Search for flavour-changing neutral currents in processes with one top quark and a photon using 81fb−1 of pp collisions at √s=13 TeV with the ATLAS experiment | - |
dc.type | Article | - |
dc.identifier.email | Paredes Hernandez, D: dparedes@hku.hk | - |
dc.identifier.email | Tu, Y: yanjuntu@hku.hk | - |
dc.identifier.authority | Tu, Y=rp01971 | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1016/j.physletb.2019.135082 | - |
dc.identifier.scopus | eid_2-s2.0-85075235650 | - |
dc.identifier.hkuros | 309064 | - |
dc.identifier.volume | 800 | - |
dc.identifier.spage | 135082:1 | - |
dc.identifier.epage | 135082:21 | - |
dc.identifier.isi | WOS:000503832500051 | - |
dc.publisher.place | Netherlands | - |
dc.identifier.issnl | 0370-2693 | - |