After 50 Years, Physicists May Have Finally Found a Particle Made of Pure Force

Gluons are the quantum ‘Gorilla Glue’ involved in binding quarks together, ScienceAlert reminds us. But for nearly 50 years, physicists have hunted for “glueballs”, exotic particles predicted by this theory of the strong interaction — the only type of particle in nature composed entirely of force mediators: Now, a collaboration working at a collider in Beijing says it has the clearest evidence yet that a known particle called X(2370) is dominated by one of these elusive states… Physicists sifted through the wreckage of high-energy particle collisions to find strong evidence of this glueball,