Search for flavour-changing neutral-current couplings between the top quark and the photon with the ATLAS detector at $\sqrt{s} = 13$ TeV

The ATLAS collaboration
Aad, Georges , Abbott, Braden Keim , Abbott, Dale , Abed Abud, Adam , Abeling, Kira , Abidi, Haider , Aboulhorma, Asmaa , Abramowicz, Halina , Abreu, Henso , Abulaiti, Yiming
Phys.Lett.B 842 (2023) 137379, 2023.

Abstract (data abstract)
Search for flavour-changing neutral-current couplings between the top-quark and the photon with the ATLAS detector at $\sqrt{s} = 13$ TeV The analysis uses data collected in $pp$ collisions at $\sqrt{s} = 13$~TeV during the LHC Run 2 corresponding to an integrated luminosity of 139~fb$^{-1}$. Both FCNC top-quark production and decay are considered. The final state consists of a charged lepton, missing transverse momentum, a $b$-tagged jet, one high momentum photon and possibly additional jets. A multiclass deep neural network is used to classify events as either one of the two signal categories, FCNC production or decay, or as background. # hepdata_doi: 10.17182/hepdata.105039.v1

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