Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-12-15
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, 6 figures. v2: scalar singlet dark matter results changed, CMSSM results unchanged
Scientific paper
We study phenomenological implications of the ATLAS and CMS hints of a $125\pm 1$ GeV Higgs boson for the singlet, doublet and singlet plus doublet non-supersymmetric dark matter models, and for the phenomenology of the CMSSM. We show that in those scalar dark matter models the vacuum stability bound on Higgs boson mass is lower than in the standard model and the 125 GeV Higgs boson is consistent with the models being valid up the GUT or Planck scale. 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 spectra. Imposing the $(g-2)_\mu$ constraint introduces severe tension between the high SUSY scale and the experimental measurements -- 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 XENON100 but might be of measurable magnitude in the general case of light dark matter with large bino-higgsino mixing and unobservably large scalar masses.
Kadastik Mario
Kannike Kristjan
Racioppi Antonio
Raidal Martti
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