ausblenden:
Schlagwörter:
High Energy Physics - Phenomenology, hep-ph
Zusammenfassung:
Weakly Interacting Massive Particles (WIMPs) and axions are arguably the most
compelling dark matter candidates in the literature. Could they coexist as dark
matter particles? More importantly, can they be incorporated in a well
motivated framework in agreement with experimental data? In this work, we show
that this two component dark matter can be realized in the Inert Doublet Model
in an elegant and natural manner by virtue of the spontaneous breaking of a
Peccei-Quinn $U(1)_{PQ}$ symmetry into a residual $Z_2$ symmetry. The WIMP
stability is guaranteed by the $Z_{2}$ symmetry and a new dark matter
component, the axion, arises. There are two interesting outcomes: (i)
vector-like quarks needed to implement the Peccei-Quinn symmetry in the model
act as a portal between the dark sector and the SM fields with a
supersymmetry-type phenomenology at colliders; (ii) two-component Inert Doublet
Model re-opens the phenomenologically interesting 100-500 GeV mass region. We
show that the model can plausibly have two component dark matter and at the
same time avoid low and high energy physics constraints such as monojet and
dijet plus missing energy, as well as indirect and direct dark matter detection
bounds.
