Dark Matter Theories in the Light of Diphoton Excess

A new type of dark matter (DM) theories are proposed in the light of the standard model (SM) singlet scalar $ϕ$ which is responsible for the diphoton excess at the LHC Run 2. In the so-called $ϕ$-portal DM models, after taking into account the LHC constraints and DM direct detection limits, we show that in the perturbative framework DM as either a SM singlet scalar or Dirac fermion can be allowed in a wide mass range between 400 GeV and 3 TeV. The DM can be directly detected in SM multi-jets and missing energy.

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