Physicists Observe Ultra-Rare Kaon Decay, Potentially Challenging Standard Model

The discovery of a one-in-10-billion kaon decay could reveal new physics beyond our current understanding.

Scientists at CERN have observed the ultra-rare decay of a kaon into a pion and a neutrino-antineutrino pair.
This discovery is the first experimental observation of this decay, which occurs about 13 times in 100 billion kaon decays.
The observed decay rate is about 50% higher than the Standard Model of particle physics predicts.
Researchers suggest the discrepancy could indicate new, previously unknown subatomic particles or forces.
Further experiments are underway to confirm these findings and explore their implications for modern physics.