Dark Matter –“Is Disappearing Since the Big Bang”

Dark Matter in Early Universe


“Let’s imagine that dark matter consists of several components, as in ordinary matter (protons, electrons, neutrons, neutrinos, photons). And one component consists of unstable particles with a rather long lifespan: in the era of the formation of hydrogen hundreds of thousands of years after the Big Bang they are still in the Universe, but by now billions of years later, they have disappeared, having decayed into neutrinos or hypothetical relativistic particles.