Physicists Report Evidence of Ultrarare Particle Decay
After about 42 years of searching, physicists say they have found evidence of a particle decaying in an ultrarare way, about once in ten billion times. The result is still evidence rather than a confirmed discovery, and several science outlets are covering it.
Context
Context: A particle decay is when an unstable particle breaks into lighter ones. Physicists look for ultrarare decays because they can reveal gaps in the Standard Model, the main theory describing known particles, though a single result usually needs independent confirmation.
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