Abstract
We propose an extended version of the gauge-mediated SUSY breaking models where extra SU(2)L doublets and singlet field are introduced. These fields are assumed to be parity-odd under an additional matter parity. In this model, the lightest parity-odd particle among them would be dark matter in the Universe. In this Letter, we discuss direct detection of the dark matter and the collider signatures of the model.
Highlights
Supersymmetry (SUSY) is one of the best-motivated physics beyond the standard model (SM) since it naturally solves the gauge-hierarchy problem
The relic abundance of the gravitino in the Universe depends on the reheating temperature after inflation, and a stringent upper bound on the reheating temperature is obtained so that the gravitino does not exceed the present dark matter (DM) abundance [3]
In this paper we extend the gauge-mediated SUSY breaking (GMSB) models to include a candidate for WIMP DM
Summary
Supersymmetry (SUSY) is one of the best-motivated physics beyond the standard model (SM) since it naturally solves the gauge-hierarchy problem. We discuss about Hc′ and Hc′ in Eq (1), which are introduced in order to maintain the successful gauge coupling unification They have color and electric charges, and their masses are expected to be order of electroweak scale.. When DM is singlet-like boson, the decay of the triplet fermion is suppressed by the mixing between the singlet and doublet states The feature of these long-lived colored particles are constrained from the viewpoint of cosmology. Their relic abundance would be determined by geometrical cross sections of order of 10 mb effectively at temperatures below the QCD phase transition, and they annihilate efficiently before the Big Bang nucleosynthesis (BBN) if their masses are lighter than about 1011 GeV [24].
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