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‘Impossible’ Particle Discovery Adds Key Piece to the Strong Force Puzzle
particle physicsBy Charlie WoodSeptember 27, 2021The unexpected discovery of the double-charm tetraquark has given physicists a new tool with which to hone their understanding of the strongest of nature’s fundamental forces.A simple model can explain groupings of two or three quarks, but it fails to explain tetraquarks. Samuel Velasco/Quanta MagazineThis spring, at a meeting of…