Particle Made of Pure Force

BeijingX(2370) is built from force carriers, not matter.

The BESIII Collaboration reports it as a pseudoscalar glueball, spin-parity 0⁻⁺, a 1970s QCD prediction unconfirmed for 15 years because glueballs mix with ordinary particles.

The finding was presented at the ICHEP conference in Brazil as a decomposition argument, not a final sighting.

Sources: Phys.org