Physicists Find Strong Evidence for Elusive 'Glueball' Particle

A particle made of force: physicists say they've found mysterious 'glueball'

After nearly two decades of searching, a team at China's BESIII experiment has presented compelling evidence that a particle called X(2370) is a glueball—a particle made entirely of gluons, the force-carrying particles that bind quarks together. The findings, announced at a conference in Brazil, could confirm a key prediction of quantum chromodynamics and shed light on how mass arises.