2007 journal article
Coulomb gauge approach to (qqg)over-bar hybrid mesons
EUROPEAN PHYSICAL JOURNAL C, 51(2), 347–358.
open access via arxiv.org (repository)
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An effective Coulomb gauge Hamiltonian, H_eff, is used to calculate the light (u-ubar-g), strange (s-sbar-g) and charmed (c-cbar-g) hybrid meson spectra. For the same two parameter H_eff providing glueball masses consistent with lattice results and a good description of the observed u,d,s and c quark mesons, a large-scale variational treatment predicts the lightest hybrid has J^{PC}=0^{++} and mass 2100 MeV. The lightest exotic 1^{-+} state is just above 2200 MeV, near the upper limit of lattice and Flux Tube predictions. These theoretical formulations all indicate the observed 1^{-+} pi_1(1600) and, more clearly, pi_1(1400) are not hybrid states. The Coulomb gauge approach further predicts that in the strange and charmed sectors, respectively, the ground state hybrids have 1^{+-} with masses 2125 and 3830 MeV, while the first exotic 1^{-+} states are at 2395 and 4020 MeV. Finally, using our hybrid wavefunctions, dimensional counting rules and the Franck-Condon principle, novel experimental signatures are presented to assist light and heavy hybrid meson searches.