The two steps in the gluing of matter—quarks into nucleons, and nucleons into nuclei—remain mysterious, and both will be investigated at cebaf. A series of experiments on hadronic excitations will probe the consistent quark model; others will look for gluonic states or for strange quarks inside the proton or neutron.
Source: wiktionary
GlueX is an experiment located at the Jefferson Lab, whose purpose is to study nuclear confinement by mapping the spectrum of exotic mesons generated by the excitation of the gluonic field binding the quarks.
Source: wiktionary
A hybrid meson is one with that strong gluonic field being excited. We hope to show that this ‘excited’ gluonic field is an important constituent of matter.
Source: wiktionary