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flag CERN scientists confirmed the discovery of toponium, the most massive composite particle ever observed.

flag CERN researchers using the Large Hadron Collider have provided strong evidence for toponium, a bound state of a top quark and its antiquark. flag This discovery marks the most massive composite particle ever observed, surpassing the heaviest known atomic nucleus. flag Scientists used an AI-assisted technique to detect rare signals from high-energy collisions, confirming the finding with statistical significance meeting the gold standard for discovery.

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