  The couplings of the Standard Model sector to the scale invariant degrees of
freedom can open the possibility to study dark photons (DP). The Dalitz-like
decay of the (Higgs-like) scalar boson into a single photon and DP is studied.
The interaction between DP and quarks is mediated by the derivative of the
scalar field - the dilaton, the virtual (fictitious) state. The mass of the
dilaton does not enter the final solutions. Upper limits are set on the DP
mass, the mixing strength between the standard photon and DP. The model does
allow to estimate the DP mass with the value of 4.5 MeV.
