@misc{10481/95851, year = {2017}, month = {10}, url = {https://hdl.handle.net/10481/95851}, abstract = {This article presents a search for flavour-changing neutral currents in the decay of a top quark into an up-type (q = c, u) quark and a Higgs boson, where the Higgs boson decays into two photons. The proton-proton collision data set analysed amounts to 36.1 fb−1 at √s = 13 TeV collected by the ATLAS experiment at the LHC. Top quark pair events are searched for, where one top quark decays into qH and the other decays into bW . Both the hadronic and leptonic decay modes of the W boson are used. No significant excess is observed and an upper limit is set on the t → cH branching ratio of 2.2 × 10−3 at the 95% confidence level, while the expected limit in the absence of signal is 1.6 × 10−3. The corresponding limit on the tcH coupling is 0.090 at the 95% confidence level. The observed upper limit on the t → uH branching ratio is 2.4 × 10−3.}, organization = {CERN}, organization = {MINECO}, organization = {EPLANET}, organization = {ERC}, organization = {ERDF}, organization = {FP7}, organization = {Horizon 2020}, organization = {Marie Skłodowska-Curie Actions}, organization = {CERCA Programme Generalitat de Catalunya}, organization = {Generalitat Valenciana}, publisher = {Springer Nature}, keywords = {Flavour Changing Neutral Currents}, keywords = {Hadron-Hadron scattering (experiments)}, keywords = {Higgs physics}, title = {Search for top quark decays t → qH, with H → γγ, in √s = 13 TeV pp collisions using the ATLAS detector}, doi = {10.1007/JHEP10(2017)129}, author = {Aaboud, M. and Aguilar Saavedra, Juan Antonio and Atlas Collaboration, /}, }