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Dark Matter from Conformal Sectors
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We show that a conformal-invariant dark sector, interacting conformally with the Standard Model (SM) fields through the Higgs portal, provides a viable framework where cold dark matter (CDM) and invisible Higgs decays can be addressed concurrently. Conformal symmetry naturally subsumes the Z_2 symmetry needed for stability of the CDM. It also guarantees that the weaker the couplings of the dark sector fields to the SM Higgs field, the smaller the masses they acquire through elektroweak breaking. The model comfortably satisfies the bounds from Large Hadron Collider (LHC) and Planck Space Telescope (Planck 2013).
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Cited by 1 Pith paper
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Minimal Scale-Invariant Dark Matter
In the minimal scale-invariant singlet model, freeze-in dark matter is viable only in a narrow window around 2.6 MeV, with direct-detection signals unobservably small.
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