leptogenesis

Leptogenesis is a theoretical process that explains how the universe ended up with more matter than antimatter. In the early universe, certain particles called leptons (like electrons and neutrinos) may have behaved asymmetrically—favoring matter over antimatter—due to specific interactions and decays involving high energies. This imbalance in leptons then led to a similar imbalance in other particles, ultimately resulting in the matter-dominated universe we observe today, enabling stars, planets, and life to exist. Leptogenesis is a compelling idea connecting particle physics and cosmology to explain our cosmic origins.