In this paper we propose a model of production of ordinary and dark matter in the decay of a hypothetical antigravitating medium in the form of a condensate of ( zero-momentum ) spinless massive particles ( denoted as \phi ) which fills the universe .
The decays of \phi -particles into baryons , leptons , and dark matter particles are caused by some ( after-GUT ) interaction with the mass scale between the electroweak and grand unification .
The observed dark energy is identified with a portion of a condensate which has not decayed up to the instant of measurement .
The decay rate of \phi -particles \Gamma _ { \phi } is expressed through the three parameters - the coupling constant \alpha _ { X } , the mass scale M _ { X } which defines the mass of X -particle as the mediator of after-GUT interaction , and the energy imparted to the decay products .
We show that the masses of dark matter particle m _ { \chi } \approx 5 GeV and \phi -particle m _ { \phi } \approx 15 GeV can be extracted from the 7-year WMAP and other astrophysical data about the contributions of baryon , dark matter , and dark energy densities to the total matter-energy density budget in our universe .
Such a mass of light WIMP dark matter agrees with the recent observations of CoGeNT , DAMA , and CDMS .
The obtained masses of \phi - and dark matter particle are concordant with the coupling constant of after-GUT interaction \alpha _ { X } \sim \frac { 1 } { 70 } at M _ { X } \sim 6 \times 10 ^ { 10 } GeV , and the decay rate \Gamma _ { \phi } \approx 2 \times 10 ^ { -18 } \mbox { s } ^ { -1 } .
The cross-sections of the reactions in which dark matter particles can be produced are calculated .