Search for dark Higgs inflaton with curvature couplings at LHC
  experiments
  We analyse the dark Higgs inflation model with curvature corrections and
explore the possibility to test its predictions by the particle physics
experiments at LHC.
  We show that the dark Higgs inflation model with curvature corrections is
strongly favoured by the present cosmological observations. The cosmological
predictions of this model, including the quantum corrections of dark Higgs
coupling constants and the uncertainty in estimation of the reheating
temperature, lead to the dark Higgs mass $m_{\phi}=0.919 \pm$ 0.211 GeV and the
mixing angle $\theta =1.492 \pm$ 0.045 (at 68\% CL). We evaluate the FASER and
MAPP-1 experiments reach for dark Higgs inflaton mass and mixing angle in the
95\% CL cosmological confidence region for an integrated luminosity of
3ab$^{-1}$ at 13 TeV LHC, assuming 100\% detection efficiency.
  We conclude that the dark Higgs inflation model with curvature corrections is
a compelling inflation scenario based on particle physics theory favoured by
the present cosmological measurements that leaves imprints in the dark Higgs
boson searchers at LHC.
