  We examine a model with a fermionic dark matter candidate having pseudoscalar
interaction with the standard model particles where its direct detection
elastic scattering cross section at tree level is highly suppressed. We then
calculate analytically the leading loop contribution to the spin independent
scattering cross section. It turns out that these loop effects are sizable over
a large region of the parameter space. Taking constraints from direct detection
experiments, the invisible Higgs decay measurements, observed DM relic density,
we find viable regions which are within reach in the future direct detection
experiments such as XENONnT.
