Scientists find evidence of rarest particle decay after 42-year hunt at CERN

UK physicists at CERN's Large Hadron Collider (LHC) have found the first evidence of an extremely rare particle decay, known as 'Bd to mu mu', where a beauty particle decays into two muons. This discovery, after a 42-year search, brings physicists closer to exploring the 'Zeptoverse'—a realm of extremely small distances where new particles and fundamental forces may be hiding. The finding was made by the upgraded Large Hadron Collider beauty experiment (LHCb), which can now collect data at up to five times its previous rate, enhancing the study of rare particle processes.