Composite Dark Sectors
  We introduce a new paradigm in Composite Dark Sectors, where the full
Standard Model (including the Higgs boson) is extended with a
strongly-interacting composite sector with global symmetry group $\mathcal{G}$
spontaneously broken to $\mathcal{H}\subset \mathcal{G}$. We show that, under
well-motivated conditions, the lightest neutral pseudo Nambu-Goldstone bosons
are natural dark matter candidates for they are protected by a parity symmetry
not even broken in the electroweak phase. These models are characterized by
only two free parameters, namely the typical coupling $g_D$ and the scale $f_D$
of the composite sector, and are therefore very predictive. We consider in
detail two minimal scenarios, $SU(3)/[SU(2)\times U(1)]$ and $[SU(2)^2\times
U(1)]/[SU(2)\times U(1)]$, which provide a dynamical realization of the Inert
Doublet and Triplet models, respectively. We show that the radiatively-induced
potential can be computed in a five-dimensional description with modified
boundary conditions with respect to Composite Higgs models. Finally, the dark
matter candidates are shown to be compatible, in a large region of the
parameter space, with current bounds from dark matter searches as well as
electroweak and collider constraints on new resonances.
