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

Dark Matter Theories in the Light of Diphoton Excess