2007 article
QCD Coulomb gauge approach to exotic hadrons
Cotanch, S. R., General, I. J., & Wang, P. (2007, March). EUROPEAN PHYSICAL JOURNAL A, Vol. 31, pp. 656–661.
open access via arxiv.org (repository)
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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).