M. Kadastik, K. Kannike, A. Racioppi, M. Raidal
We study phenomenological implications of the ATLAS and CMS hints for $125\pm
1$ GeV Higgs boson for the singlet, doublet and singlet plus doublet
non-supersymmetric dark matter models, and on the phenomenology of the CMSSM.
We show that the scalar DM models cannot lower the vacuum stability bounds of
the standard model and the 125 GeV Higgs implies the triviality $\lambda=0$ to
occur several orders of magnitude below the GUT scale exactly as in the
standard model. We perform a detailed study of the full CMSSM parameter space
keeping the Higgs boson mass fixed to $125\pm 1$ GeV, and study in detail the
freeze-out processes that imply the observed amount of dark matter. After
imposing all phenomenological constraints except for the muon $(g-2)_\mu,$ we
show that the CMSSM parameter space is divided into well separated regions with
distinctive but in general heavy sparticle mass spectrum. Imposing the
$(g-2)_\mu$ constraint introduces severe tension between the high SUSY scale
and the experimental measurement and only the slepton co-annihilation region
survives with potentially testable sparticle masses at the LHC. In the latter
case the spin-independent DM-nucleon scattering cross section is predicted to
be below detectable limit at the XENON 100 but might be of measurable magnitude
in the general case of light dark matter with large gaugino-higgsino mixing and
unobservably large scalar masses.
View original:
http://arxiv.org/abs/1112.3647
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