  A field theory is proposed where the regular fermionic matter and the dark
fermionic matter can be different states of the same "primordial" fermion
fields. In regime of the fermion densities typical for normal particle physics,
the primordial fermions split into three families identified with regular
fermions. When fermion energy density becomes comparable with dark energy
density, the theory allows transition to new type of states. The possibility of
such Cosmo-Low Energy Physics (CLEP) states is demonstrated by means of
solutions of the field theory equations describing FRW universe filled with
homogeneous scalar field and uniformly distributed nonrelativistic neutrinos.
Neutrinos in CLEP state are drawn into cosmological expansion by means of
dynamically changing their own parameters. One of the features of the fermions
in CLEP state is that in the late time universe their masses increase as
a^{3/2} (a=a(t) is the scale factor). The energy density of the cold dark
matter consisting of neutrinos in CLEP state scales as a sort of dark energy;
this cold dark matter possesses negative pressure and for the late time
universe its equation of state approaches that of the cosmological constant.
The total energy density of such universe is less than it would be in the
universe free of fermionic matter at all.
