Dark matter and Higgs bosons in the MSSM
  We investigate dark matter (DM) in the context of the minimal supersymmetric
extension of the standard model (MSSM). We scan through the MSSM parameter
space and search for solutions that (a) are consistent with the Higgs discovery
and other collider searches; (b) satisfy the flavor constraints from $B$
physics; (c) give a DM candidate with the correct thermal relic density; and
(d) are allowed by the DM direct detection experiments. For the surviving
models with our parameter scan, we find the following features: (1) The DM
candidate is largely a Bino-like neutralino with non-zero but less than $20\%$
Wino and Higgsino fractions; (2) The relic density requirement clearly pins
down the solutions from the $Z$ and Higgs resonances ($Z,h,H,A$ funnels) and
co-annihilations; (3) Future direct search experiments will likely fully cover
the $Z,h$ funnel regions, and $H,A$ funnel regions as well except for the
"blind spots"; (4) Future indirect search experiments will be more sensitive to
the CP-odd Higgs exchange due to its $s$-wave nature; (5) The branching
fraction for the SM-like Higgs decay to DM can be as high as $10\%$, while
those from heavier Higgs decays to neutralinos and charginos can be as high as
$20\%$. We show that collider searches provide valuable information
complementary to what may be obtained from direct detections and astroparticle
observations. In particular, the $Z$- and $h$-funnels with a predicted low LSP
mass should be accessible at future colliders. Overall, the Higgs bosons may
play an essential role as the portal to the dark sector.
