The CMS collaboration at CERN has observed an unexpected feature in data produced by the Large Hadron Collider (LHC), which could point to the existence of the smallest composite particle yet observed ...
Molecular pentaquark Artist’s impression of how five quarks could bind together to form an exotic hadron. Such particles have been spotted at CERN, Fermilab and SLAC. (Image: Daniel Dominguez/CERN) ...
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