Physical Review Letters: proposed a theory about the origin of dark matter from ordinary 
ordinary (baryonic) matter and is also capable of creating more dark matter from ordinary matter. This is reported in an article published in the journal Physical Review Letters.
According to the new theory, a certain amount of dark matter was created in a “thermal bath” when a primary plasma of ordinary matter gave rise to dark matter particles. At some point, new dark matter particles began to produce even more dark matter particles from ordinary particles. This process continued until dark matter reached the amount that is observed today.
It is noted that in such a scenario of “infection”, in the end, nothing could remain in the Universe except dark matter particles. However, scientists suggest that the reason this did not happen is the rapid expansion of the universe. Since the universe was smaller and denser early in its existence, dark matter could easily come into contact with ordinary matter and transform it. The expansion led to the fact that space objects moved further and further from each other, and therefore dark matter met with ordinary matter less and less.
Simulation results showed that such a theory can explain the amount of dark matter, which is believed , currently exists. If their ideas are correct, then traces of the process of transformation of baryonic matter should remain in the cosmic background radiation, which will prove the theory.