Utilizing an effective QCD Coulomb gauge Hamiltonian with linear confinement specified by lattice, we report a relativistic many-body calculation for the light exotic and charmed hybrid mesons. The Hamiltonian successfully describes both quark and gluon sectors, with vacuum and quasiparticle properties generated by a BCS transformation and more elaborate TDA and RPA diagonalizations for the meson (q (q) over bar) and glueball (gg) masses. Hybrids entail a computationally intense relativistic three quasiparticle (q (q) over barg) calculation with the 9-dimensional Hamiltonian matrix elements evaluated variationally by Monte Carlo techniques. Our new TDA (RPA) spectrum for the nonexotic 1(--) charmed (c (c) over bar and c (c) over barg) system provides an explanation for the overpopulation of the observed J/psi states. For the important 1(-+) light exotic channel we obtain hybrid masses above 2 GeV, in broad agreement with lattice and flux tube models, indicating that the recently observed resonances at 1.4 and 1.6 GeV are of different, perhaps four quark, structure. (C) 2001 Published by Elsevier Science B.V. [References: 23]
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