Glueball spectrum and matrix elements on anisotropic lattices
Abstract
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 ranging from 0.1-0.2 fm. These matrix elements are needed to predict the glueball branching ratios in J/ψ radiative decays which will help 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 studied. We find that lattice spacing dependence of our results is very weak and the continuum limits are reliably extrapolated, as a result of improvement of the lattice gauge action and local operators. We also give updated glueball masses with various quantum numbers.
- Publication:
-
Physical Review D
- Pub Date:
- January 2006
- DOI:
- 10.1103/PhysRevD.73.014516
- arXiv:
- arXiv:hep-lat/0510074
- Bibcode:
- 2006PhRvD..73a4516C
- Keywords:
-
- 12.38.Gc;
- 11.15.Ha;
- 12.39.Mk;
- Lattice QCD calculations;
- Lattice gauge theory;
- Glueball and nonstandard multi-quark/gluon states;
- High Energy Physics - Lattice;
- High Energy Physics - Phenomenology
- E-Print:
- 22 pages, 16 figures, revtex4