Light vector meson decay constants and the renormalization factor from a tadpole-improved action
High Energy Physics - Lattice
2009-10-28 v1
Abstract
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.
Cite
@article{arxiv.hep-lat/9610027,
title = {Light vector meson decay constants and the renormalization factor from a tadpole-improved action},
author = {Randy Lewis and R. M. Woloshyn},
journal= {arXiv preprint arXiv:hep-lat/9610027},
year = {2009}
}
Comments
16 pages of Revtex, including 9 figures which use epsf