Physicists propose early-universe theory with a forgotten particle

Scientists have put forward a new theory of the cosmos's birth in which an ancient particle, overlooked for decades, shaped the early universe. The idea may explain why matter dominates over antimatter.

• The theory ties early-universe evolution to a long-ignored particle
• It aims to explain the matter-antimatter imbalance
• The work is reported by Phys.org and awaits experimental testing