Complementarity of DM Searches in a Consistent Simplified Model: the
  Case of Z'
  We analyze the constraints from direct and indirect detection on fermionic
Majorana Dark Matter (DM). Because the interaction with the Standard Model (SM)
particles is spin-dependent, a priori the constraints that one gets from
neutrino telescopes, the LHC, direct and indirect detection experiments are
comparable. We study the complementarity of these searches in a particular
example, in which a heavy $Z'$ mediates the interactions between the SM and the
DM. We find that for heavy dark matter indirect detection provides the
strongest bounds on this scenario, while IceCube bounds are typically stronger
than those from direct detection. The LHC constraints are dominant for smaller
dark matter masses. These light masses are less motivated by thermal relic
abundance considerations. We show that the dominant annihilation channels of
the light DM in the Sun and the Galactic Center are either $b\bar b$ or $t\bar
t$, while the heavy DM annihilation is completely dominated by $Zh$ channel.
The latter produces a hard neutrino spectrum which has not been previously
analyzed. We study the neutrino spectrum yielded by DM and recast IceCube
constraints to allow proper comparison with constraints from direct and
indirect detection experiments and LHC exclusions. Note that the original
version of the paper contains an important error: the contribution of the
$Z$-mediated processes was overlooked. This changes some of the results of the
paper. For the details and the correct results please see the erratum attached
to this file as an appendix.
