@Article{ATLASCollaborationAaboud_etal2017, author="ATLAS Collaboration (Aaboud, M. et al and Alvarez Piqueras, D. and Barranco Navarro, L. and Cabrera Urban, S. and Castillo Gimenez, V. and Cerda Alberich, L. and Costa, M. J. and Escobar, C. and Estrada Pastor, O. and Fernandez Martinez, P. and Ferrer, A. and Fiorini, L. and Fuster, J. and Garcia, C. and Garcia Navarro, J. E. and Gonzalez de la Hoz, S. and Higon-Rodriguez, E. and Jimenez Pena, J. and Lacasta, C. and Madaffari, D. and Mamuzic, J. and Marti-Garcia, S. and Melini, D. and Mitsou, V. A. and Pedraza Lopez, S. and Rodriguez Bosca, S. and Rodriguez Rodriguez, D. and Romero Adam, E. and Salt, J. and Sanchez Martinez, V. and Soldevila, U. and Sanchez, J. and Valero, A. and Valls Ferrer, J. A. and Vos, M.", title="Search for top quark decays t -> qH,with H -> gamma gamma, in root s=13 TeV pp collisions using the ATLAS detector", journal="Journal of High Energy Physics", year="2017", publisher="Springer", volume="10", number="10", pages="129--43pp", optkeywords="Flavour Changing Neutral Currents; Hadron-Hadron scattering (experiments); Higgs physics; Top physics", 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 root s = 13TeV 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 x 10(-3) at the 95{\%} confidence level, while the expected limit in the absence of signal is 1 : 6 x 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 x 10(-3).", optnote="WOS:000413664300001", optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3352), last updated on Wed, 15 Nov 2017 11:51:01 +0000", issn="1029-8479", doi="10.1007/JHEP10(2017)129", opturl="http://arxiv.org/abs/1707.01404", opturl="https://doi.org/10.1007/JHEP10(2017)129", archivePrefix="arXiv", eprint="1707.01404", language="English" }