  Convincing and direct evidence for dark matter (DM) on galactic scales comes
from the observation of the rotation curves of galaxies. At particle colliders,
searches for DM involve the production of a pair of stable electrically neutral
and weakly interacting particles with a signature of missing transverse energy
($E^{\rm T}_{\rm miss}$) recoiling against a SM particle. The resulting
signature yields a final state denoted as X+$E^{\rm T}_{\rm miss}$, where the
SM particle X is emitted as initial state radiation. The Higgs boson discovery
at the LHC opens a new window into the searches for new physics processes
beyond the SM through the h+$E^{\rm T}_{\rm miss}$ signature, as a direct probe
of the interaction involving DM particles. Due to the small Yukawa couplings to
quarks and gluons, the initial state radiation of the Higgs boson is
suppressed, but it can be produced in the case of a new interaction with DM
particles. Searches for DM particles produced in association with the Higgs
boson are discussed. They are based on proton-proton collision data at the LHC
in different final states.
