  On the basis of hypotheses, that a density of weakly interacting particles in
the Universe has an order of nuclear matter density or more the Lagrangian is
offered, through which one can be obtained a propagator of a vector boson with
a non-zero rest-mass. The dependence of vector bosons masses on the time allows
to explain the availability of the hot stage of the Universe evolution, not
using to the hypothesis of the Universe expansion.
