@article{oai:tsukuba.repo.nii.ac.jp:00048505,
 author = {原, 和彦 and 金, 信弘 and 大川, 英希 and 佐藤, 構二 and 受川, 史彦 and ATLA Collaboration and Hara, K. and Kim, S.H. and Okawa, H. and Sato, K. and Ukegawa, F.},
 issue = {3},
 journal = {Physical review D},
 month = {Aug},
 note = {Flavor-changing neutral currents are not present in the Standard Model at tree level and are suppressed in loop processes by the unitarity of the Cabibbo-Kobayashi-Maskawa matrix; the corresponding rates for top quark decay processes are experimentally unobservable. Extensions of the Standard Model can generate new flavor-changing neutral current processes, leading to signals which, if observed, would be unambiguous evidence of new interactions. A data set corresponding to an integrated luminosity of 36.1??fb?1 of pp collisions at a center-of-mass energy of √s=13??TeV recorded with the ATLAS detector at the Large Hadron Collider is used to search for top quarks decaying to up or charm quarks with the emission of a Higgs boson, with subsequent Higgs boson decay to final states with at least one electron or muon. No signal is observed and limits on the branching fractions B(t→Hc)<0.16% and B(t→Hu)<0.19% at 95% confidence level are obtained (with expected limits of 0.15% in both cases).},
 title = {Search for flavor-changing neutral currents in top quark decays t→Hc and t→Hu in multilepton final states in proton-proton collisions at √s=13??TeV with the ATLAS detector},
 volume = {98},
 year = {2018}
}