Solution to the matter-antimatter asymmetry problem

The matter-antimatter asymmetry problem is solved by simply considering the number densities of various
species of non-interacting massive fermions and antifermions, the equations of which are presented and
explained in this article in the context of the evolution of the universe. Their respective number densities
depend on temperature and also on chemical potential of the respective species. Of great importance here is
the change in sign of the non-zero chemical potential of the respective fermion species as well as the dipping
in temperature of the matter due to the expansion of the universe when comparing the equations of the
number densities of fermions and antifermions of the respective species. This explains the initially slight and
later significant predominance of fermions over antifermions in cosmic evolution as well as the almost
complete disappearance of antimatter in today’s universe.