gluonides
Gluonides are hypothetical hadronic bound states in QCD-inspired theories. They are envisioned as systems in which gluons—the carriers of the strong force—bind with each other and with quarks. A gluonide may be purely gluonic (glueball-like) or contain quark content, classed as a gluonic hybrid. The term is used in speculative contexts to describe resonances that do not fit neatly into conventional meson or baryon categories.
Theoretical background: Nonperturbative QCD allows self-interacting gluons to form bound states. Lattice QCD studies predict a
Typical properties: Gluonides would carry quantum numbers determined by their constituents. They are expected to be
Experimental status: No unambiguous gluonide has been observed. Several resonances in high-energy collisions and in e+e−