  This study focuses on a combined analysis of various available inputs to
constrain the parameter spaces of a simplified dark matter (SDM) model
featuring a spin-0 mediator and fermionic dark matter (DM). The spin-0 mediator
interacts with standard model (SM) fermions, SM gauge bosons, and DM. We
constrain the parameter spaces of different relevant couplings, DM mass, and
the mediator mass, using the data from flavour-changing charged and neutral
current processes, CKM matrices, $W$ and $Z$-pole observables, DM relic
density, direct and indirect detection bounds. We have calculated bounds on the
couplings from both separate and simultaneous analyses of the mentioned
processes. We identify correlated parameter spaces for all the relevant
parameters which include the couplings and the masses. For the DM and mediator
masses, we have scanned the region between 100 GeV and 1000 GeV. Using our
results, we have obtained bounds on the couplings of possible higher
dimensional operators from which we can formulate our SDM.
