Glueball Matrix Elements on Anisotropic Lattices

Details Glueball Matrix Elements on Anisotropic Lattices Glueball Matrix Elements on Anisotropic Lattices

2003-10-03

arxiv.org/abs/hep-lat/0310013v1

Nucl.Phys.Proc.Suppl.129:203-205,2004

Physics

High Energy Physics

High Energy Physics - Lattice

3 pages, 3 figures, Lattice2003 (spectrum)

Scientific paper

10.1016/S0920-5632(03)02530-1

The glueball-to-vacuum matrix elements of local gluonic operators in scalar, tensor, and pseudoscalar channels are investigated numerically on several anisotropic lattices with the spatial lattice spacing in the range 0.1fm -- 0.2fm. These matrix elements are needed to predict the glueball branching ratios in $J/\psi$ radiative decays which will help to identify the glueball states in experiments. Two types of improved local gluonic operators are constructed for a self-consistent check, and the finite volume effects are also studied. The lattice spacing dependence of our results is very small and the continuum limits are reliably extrapolated.

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