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Many-Body Coulomb Gauge Exotic and Charmed Hybrids | | Felipe J. Llanes-Estrada
; Stephen R. Cotanch
; | | Date: |
31 Aug 2000 | | Journal: | Phys.Lett. B504 (2001) 15-20 | | Subject: | hep-ph | | Abstract: | Utilizing a 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 ($qar{q}$) and glueball ($gg$) masses. Hybrids entail a computationally intense relativistic three quasiparticle ($qar{q}g$) calculation with the 9 dimensional Hamiltonian matrix elements evaluated variationally by Monte Carlo techniques. Our new TDA (RPA) spectrum for the nonexotic $1^{--}$ charmed ($car{c}$ and $car{c}g$) 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. | | Source: | arXiv, hep-ph/0008337 | | Services: | Forum | Review | PDF | Favorites | |
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