Leptogenesis

Leptogenesis is a theory that attempts to explain the dominance of matter over antimatter in the universe. It is based on the idea that the asymmetry between matter and antimatter particles originated in the early moments of the universe’s formation, when the universe was incredibly hot and dense. According to this theory, the excess of leptons (a class of elementary particles that includes electrons, muons, and tau particles) over antileptons was generated through a series of out-of-equilibrium processes, which in turn produced the observed matter-antimatter asymmetry.

A crucial aspect of leptogenesis is the role played by neutrinos, which are neutral, weakly interacting particles with a tiny mass. These elusive particles come in three flavors: electron neutrinos, muon neutrinos, and tau neutrinos.