Physicists discover elusive 'glueball' particle

Solving a 50-year mystery, BESIII physicists found strong evidence for a 'glueball', a particle made entirely of force-carrying gluons. The particle, X(2370), matches theoretical predictions for mass, decay, and quantum numbers. Though not definitively proven as a perfectly pure state, this glueball-dominated discovery marks a major milestone in understanding quantum chromodynamics.