Heavy Neutrino Theory Proposed to Explain Universe's Matter-Antimatter Imbalance

Physicists have theorized that a previously unobserved "decoupled" heavy neutrino could account for the universe's matter dominance over antimatter. This exotic particle, decaying extremely slowly, might have temporarily increased the universe's energy density post-Big Bang, thereby influencing the fundamental asymmetry necessary for our existence. This hypothesis offers a new perspective on a long-standing cosmological mystery.