Abstract.
The Coulomb gauge Hamiltonian model is used to calculate masses for selected JPC states consisting of exotic combinations of quarks and gluons: ggg glueballs (oddballs), q¯g hybrid mesons and q¯q¯ tetraquark systems. An odderon Regge trajectory is computed for the J- glueballs with intercept much smaller than the pomeron, explaining its nonobservation. The lowest 1-+ hybrid-meson mass is found to be just above 2.2GeV while the lightest tetraquark state mass with these exotic quantum numbers is predicted around 1.4GeV consistent with the observed π(1400).
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Cotanch, S.R., General, I.J. & Wang, P. QCD Coulomb gauge approach to exotic hadrons. Eur. Phys. J. A 31, 656–661 (2007). https://doi.org/10.1140/epja/i2006-10234-2
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DOI: https://doi.org/10.1140/epja/i2006-10234-2