Higgs Partner Searches and Dark Matter Phenomenology in a Classically
  Scale Invariant Higgs Boson Sector
  In a previous work, a classically scale invariant extension of the standard
model was proposed, as a potential candidate for resolving the hierarchy
problem, by minimally introducing a complex gauge singlet scalar, and
generating radiative electroweak symmetry breaking by means of the Coleman-
Weinberg Mechanism. Postulating the singlet sector to respect the CP-symmetry,
the existence of a stable pseudoscalar dark matter candidate with a mass in the
TeV range was demonstrated. More- over, the model predicted the presence of
another physical CP-even Higgs boson (with suppressed tree-level couplings), in
addition to the 125 GeV scalar discovered by the LHC. The viable region of the
parameter space was determined by various theoretical and experimental
considerations. In this work, we continue to examine the phenomenological
implications of the proposed minimal sce- nario by considering the constraints
from the dark matter relic density, as determined by the Planck collaboration,
as well as the direct detection bounds from the LUX experiment. Furthermore, we
investigate the implications of the collider Higgs searches for the additional
Higgs boson. Our results are comprehensively demonstrated in unified exclusion
plots, which analyze the viable region of the parameter space from all relevant
angles, demonstrating the testability of the proposed scenario.
