Speaker: Zhi-Wei Wang
Location: Physics 175
Time: 3:30, June 19 2014
Abstract: We consider generation of dark matter mass via radiative
electroweak symmetry breaking in an extension of the conformal Standard Model
containing a singlet scalar field with a Higgs portal interaction. Generating the mass
from a sequential process of radiative electroweak symmetry breaking followed by
a conventional Higgs mechanism can account for less than 30% of the cosmological
dark matter abundance. However in a dynamical approach where both Higgs and
scalar singlet masses are generated via radiative electroweak symmetry breaking we
obtain much higher levels of dark matter abundance: 10%-80% for a dark matter
mass of 80 GeV < Ms < 96 GeV when higher-order contributions are estimated.
The dynamical approach also predicts a small scalar-singlet self-coupling, providing
a natural explanation for the astrophysical observations that place upper bounds
on dark matter self-interaction. The predictions in both methods are within the
detection region of the next generation XENON experiment.