Light vector meson decay constants and the renormalization factor from a tadpole-improved action

Details Light vector meson decay constants and the renormalization factor from a tadpole-improved action Light vector meson decay constants and the renormalization factor from a tadpole-improved action

1996-10-18

arxiv.org/abs/hep-lat/9610027v1

Phys.Rev. D56 (1997) 1571-1578

Physics

High Energy Physics

High Energy Physics - Lattice

16 pages of Revtex, including 9 figures which use epsf

Scientific paper

10.1103/PhysRevD.56.1571

The rho, K* and phi decay constants and the vector current renormalization factor are studied by using an O(a^2) classically-improved, tadpole-improved action. Tree-level calculations are used to show how the classical improvement of the action, involving next-nearest-neighbour timesteps, is transferred to the matrix elements. Simulations are performed on coarse lattices and compared to Wilson results from both coarse and fine lattices. The improved action data are found to resemble Wilson data obtained at 1/3 of the lattice spacing, which is the same degree of improvement that is seen by comparing the mass spectra.

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