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Search for flavour-changing neutral currents in processes with one top quark and a photon using 81 fb−1 of pp collisions at s=13TeV with the ATLAS experiment

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Search for flavour-changing neutral currents in processes with one top quark and a photon using 81 fb−1 of pp collisions at s=13TeV with the ATLAS experiment. / Collaboration, ATLAS; Barton, A.E.; Bertram, I.A. et al.
In: Physics Letters B, Vol. 800, 135082, 10.01.2020.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Collaboration, ATLAS, Barton, AE, Bertram, IA, Borissov, G, Bouhova-Thacker, EV, Fox, H, Henderson, RCW, Jones, RWL, Kartvelishvili, V, Long, RE, Love, PA, Muenstermann, D, Parker, AJ, Smizanska, M, Tee, AS, Walder, J, Wharton, AM, Whitmore, BW, Sanderswood, I & Yexley, M 2020, 'Search for flavour-changing neutral currents in processes with one top quark and a photon using 81 fb−1 of pp collisions at s=13TeV with the ATLAS experiment', Physics Letters B, vol. 800, 135082. https://doi.org/10.1016/j.physletb.2019.135082

APA

Collaboration, ATLAS., Barton, A. E., Bertram, I. A., Borissov, G., Bouhova-Thacker, E. V., Fox, H., Henderson, R. C. W., Jones, R. W. L., Kartvelishvili, V., Long, R. E., Love, P. A., Muenstermann, D., Parker, A. J., Smizanska, M., Tee, A. S., Walder, J., Wharton, A. M., Whitmore, B. W., Sanderswood, I., & Yexley, M. (2020). Search for flavour-changing neutral currents in processes with one top quark and a photon using 81 fb−1 of pp collisions at s=13TeV with the ATLAS experiment. Physics Letters B, 800, Article 135082. https://doi.org/10.1016/j.physletb.2019.135082

Vancouver

Collaboration ATLAS, Barton AE, Bertram IA, Borissov G, Bouhova-Thacker EV, Fox H et al. Search for flavour-changing neutral currents in processes with one top quark and a photon using 81 fb−1 of pp collisions at s=13TeV with the ATLAS experiment. Physics Letters B. 2020 Jan 10;800:135082. Epub 2019 Nov 13. doi: 10.1016/j.physletb.2019.135082

Author

Collaboration, ATLAS ; Barton, A.E. ; Bertram, I.A. et al. / Search for flavour-changing neutral currents in processes with one top quark and a photon using 81 fb−1 of pp collisions at s=13TeV with the ATLAS experiment. In: Physics Letters B. 2020 ; Vol. 800.

Bibtex

@article{4691ca8a53ee40d786f9e404babda49a,
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=13TeV with the ATLAS experiment",
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 x 10-5 ( 6.1 x 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 x 10-5 ( 18 x 10-5).",
author = "ATLAS Collaboration and A.E. Barton and I.A. Bertram and G. Borissov and E.V. Bouhova-Thacker and H. Fox and R.C.W. Henderson and R.W.L. Jones and V. Kartvelishvili and R.E. Long and P.A. Love and D. Muenstermann and A.J. Parker and M. Smizanska and A.S. Tee and J. Walder and A.M. Wharton and B.W. Whitmore and Izaac Sanderswood and Melissa Yexley",
year = "2020",
month = jan,
day = "10",
doi = "10.1016/j.physletb.2019.135082",
language = "English",
volume = "800",
journal = "Physics Letters B",
issn = "0370-2693",
publisher = "ELSEVIER SCIENCE BV",

}

RIS

TY - JOUR

T1 - Search for flavour-changing neutral currents in processes with one top quark and a photon using 81 fb−1 of pp collisions at s=13TeV with the ATLAS experiment

AU - Collaboration, ATLAS

AU - Barton, A.E.

AU - Bertram, I.A.

AU - Borissov, G.

AU - Bouhova-Thacker, E.V.

AU - Fox, H.

AU - Henderson, R.C.W.

AU - Jones, R.W.L.

AU - Kartvelishvili, V.

AU - Long, R.E.

AU - Love, P.A.

AU - Muenstermann, D.

AU - Parker, A.J.

AU - Smizanska, M.

AU - Tee, A.S.

AU - Walder, J.

AU - Wharton, A.M.

AU - Whitmore, B.W.

AU - Sanderswood, Izaac

AU - Yexley, Melissa

PY - 2020/1/10

Y1 - 2020/1/10

N2 - 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 x 10-5 ( 6.1 x 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 x 10-5 ( 18 x 10-5).

AB - 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 x 10-5 ( 6.1 x 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 x 10-5 ( 18 x 10-5).

U2 - 10.1016/j.physletb.2019.135082

DO - 10.1016/j.physletb.2019.135082

M3 - Journal article

VL - 800

JO - Physics Letters B

JF - Physics Letters B

SN - 0370-2693

M1 - 135082

ER -