Heavy Neutrino Theory Offers Clue to Matter's Cosmic Survival

A theoretical study proposes that a heavy right-handed neutrino, long dismissed as irrelevant, could explain why matter survived the Big Bang. Researchers Rishav Roshan and Sudipta Show argue the slowly decaying particle briefly dominated the early Universe's energy density, altering conditions for leptogenesis and the matter-antimatter imbalance. The scenario remains untested but could be probed via neutrino experiments and gravitational waves.