QCD Coulomb gauge approach to exotic hadrons
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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).
PACS.12.38.Lg Other nonperturbative calculations 12.39.Ki Relativistic quark model 12.39.Mk Glueball and nonstandard multi-quark/gluon states 12.40.Yx Hadron mass models and calculations
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