Baryon Asymmetry Why More Matter Than Antimatter Still Defies Physics

Описание: The universe should have erased itself in a clean flash of symmetry. Instead, a tiny imbalance survived, and everything solid in the cosmos traces back to that split-second advantage.

This episode unpacks Baryon Asymmetry Why More Matter Than Antimatter through the physics of the early universe, when the Big Bang should have produced equal amounts of matter and antimatter. We follow the evidence from CP violation first seen in 1964 by James Cronin and Val Fitch, then into Andrei Sakharov’s 1967 conditions: baryon number violation, C and CP violation, and a departure from thermal equilibrium. From kaons and B mesons to sphalerons, electroweak phase transitions, and leptogenesis driven by heavy neutrinos, the central problem remains that Standard Model effects appear far too weak to explain the observed excess of roughly one extra baryon per billion pairs. Planck measurements of the cosmic microwave background and Big Bang nucleosynthesis both pin that asymmetry to about 6 × 10^-10, while proton decay searches, neutrino experiments, and collider data continue testing where the missing antimatter really went. #Physics #ParticlePhysics #BigBang #Antimatter #CPViolation #Neutrinos #Cosmology #EarlyUniverse