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2026-08-12 · science.org

Behold the ‘glueball,’ a strange new form of matter

Collider in China forges elusive particle, made of force-carrying gluons

Note: Matter is like a Russian doll. Molecules are made of atoms, atoms of electrons and nuclei, and nuclei of protons and neutrons. Protons and neutrons, in turn, consist of quarks held together by a swarm of gluons. A glueball would be different: a particle whose mass comes almost entirely from gluons bound to one another, with little or no quark content.