hadronenes
Hadronenes are a theoretical class of composite particles proposed in extensions of quantum chromodynamics to describe bound states that extend conventional hadrons. In these models, a hadronene is a color-neutral bound object assembled from quarks and gluonic fields in configurations not possible for ordinary mesons or baryons, for example by including an explicit gluonic excitation or an additional constituent that carries color in a confined manner. As a result, hadronenes can exhibit quantum numbers that lie outside the standard meson (quark-antiquark) and baryon (three-quark) patterns, making them a type of exotic hadron.
The proposed internal structure varies by model, but common themes include a valence set of quarks combined
Status: Hadronenes have not been observed in confirmed experiments to date. They are part of ongoing discussions
See also: exotic hadrons, hybrids, glueballs, tetraquarks, pentaquarks.