Speaker
Description
Non-minimal composite Higgs (CH) models, with additional Goldstone
bosons (GB) beside the Higgs, do not only present a solution to the
hierarchy problem but could also shed light on the dark matter (DM)
puzzle. A realization of this scenario was presented in
(arXiv:1707.07685): The symmmetry breaking structure is SO(7)/SO(6) and
the DM is a complex GB, stabilized by an exact U(1). The couplings of
the top quark break explicitly both the Higgs and the DM shift
symmetries, linking the DM and Higgs potentials and predicting direct
detection signals of the size currently tested by XENON1T.
In this talk we shortly review the main results of (arXiv:1707.07685)
and present a new class of CH models, where the main breaking of the DM
shift symmetry comes either from the light quarks or from the gauging of
the stabilizing U(1) symmetry. This naturally explains the null results
of direct detection experiments, while featuring an interesting
complementary phenomenology.
