Seesaw Mechanism

The Seesaw Mechanism is a concept in particle physics that explains why neutrinos (tiny, nearly massless particles) have such small masses compared to other particles. It proposes that neutrinos gain their small mass through a "balancing act" involving a heavy, unseen partner particle. Imagine a seesaw with a tiny weight and a very heavy weight on opposite ends; the tiny weight’s position (neutrino mass) is affected by the heavy one. This mechanism naturally accounts for the tiny observed neutrino masses by linking them to much heavier, hidden particles, providing insight into the fundamental structure of matter.