Flavour changing neutral current searches in single Higgs boson production

Higgs boson anomalous FCNC interactions with $u$, $c$, $d$, $s$ and $b$ quarks is considered using the effective field theory framework. Constraints on anomalous couplings are derived from experimental results on Higgs boson production with decay into $b \bar{b}$ pair at LHC in proton-proton collsions at $\sqrt{s} = 13 $~ТэВ. Upper limits on the branching fractions of $H \to b\bar{s}$ and $H \to b\bar{d}$ are set by performing a realistic detector simulation and accurately reproducing selections of the CMS Higgs boson measurement in the four-lepton final state at $\sqrt{s} = 13$ ТэВ. The searches are projected into operation conditions of HL-LHC. Sensitivity at FCC-hh to anomalous FCNC interactions is studied based on Higgs boson production with $H \rightarrow \gamma \gamma$ decay channel. It is shown that at FCC-hh machine one can expect to set the upper limits of the order of $10^{-2}$ at $95\%$ CL for $\mathcal{B}(H \rightarrow b\bar{s})$ and $\mathcal{B}(H \rightarrow b\bar{d})$.