What is "baryogenesis"

n. (context physics astronomy English) The generation of baryonic matter in the early moments of the Big Bang

In physical cosmology, baryogenesis is the generic term for the hypothetical physical processes that produced an asymmetry (imbalance) between baryons and antibaryons produced in the very early universe. The baryonic matter that remains today, following the baryonic-antibaryonic matter annihilation, makes up the universe.

Baryogenesis theories (the most important being electroweak baryogenesis and GUT baryogenesis) employ quantum field theory, and statistical physics, to describe such possible mechanisms. The difference between baryogenesis theories is the description of the interactions between fundamental particles.

The next step after baryogenesis is the much better understood Big Bang nucleosynthesis, during which light atomic nuclei began to form.