Estimate of the charmed 0-- hybrid meson spectrum from quenched lattice QCD

Details Estimate of the charmed 0-- hybrid meson spectrum from quenched lattice QCD Estimate of the charmed 0-- hybrid meson spectrum from quenched lattice QCD

2005-11-06

arxiv.org/abs/hep-lat/0511015v2

Phys.Rev.D73:054510,2006

Physics

High Energy Physics

High Energy Physics - Lattice

Version accepted for publication in Physical Review D

Scientific paper

10.1103/PhysRevD.73.054510

We compute from quenched lattice QCD the ground state masses of the charmed hybrid mesons cbar c g, with exotic quantum numbers JPC=1-+, 0+- and 0--. The 0-- hybrid meson spectrum has never been provided by lattice simulations due to the difficulties to extract high gluonic excitations from noise. We employ improved gauge and fermion actions on the anisotropic lattice, which reduce greatly the lattice artifacts, and lead to very good signals. The data are extrapolated to the continuum limit, with finite size effects under well control. For 1-+ and 0+- hybrid mesons, the ground state masses are 4.405(38) GeV and 4.714(52) GeV. We predict for the first time from lattice QCD, the ground state mass of 0-- to be 5.883(146) GeV.

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