  A search for flavor-changing neutral current (FCNC) processes in associated
production of a top quark and Higgs boson, with the Higgs boson decaying to a
pair of b quarks, is presented. To experimentally probe the top-Higgs FCNC
couplings, for the first time the single-top production is considered as a
signal process. One isolated lepton and at least three reconstructed jets,
among which at least two are identified as b quark jets, are found in the final
state. The data sample corresponds to an integrated luminosity of
$35.9\,\mathrm{fb^{-1}}$ recorded by the CMS experiment at the LHC in
proton-proton collisions at $\sqrt{s}\,=\,13\,\mathrm{TeV}$ in 2016, and the
final results are presented in the form of the observed and expected 95\% CL
upper limits on the branching ratio of top quark decays.
