Researchers at CERN have observed an exceptionally rare particle decay event, potentially paving the way to uncover new physics beyond the current understanding of fundamental particles and their interactions.
This decay is extraordinarily uncommon—according to the Standard Model (SM) of particle physics, which describes particle interactions, fewer than one in every 10 billion kaons undergo this specific decay.
The NA62 experiment was developed and optimized precisely to detect and study this elusive kaon decay process.
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