Testing the efficiency of different improvement programs
High Energy Physics - Lattice
2011-07-19 v1
Abstract
We study the finite-size behaviour of a tree-level on-shell improved action for the N-vector model. We present numerical results for N=3 and analytic results in the large-N limit for the mass gap. We also report a perturbative computation at one loop of the mass gap for states of spatial momentum p. We present a detailed comparison of the behaviour of this action with that of other formulations, including the perfect action, and a critical discussion of the different approaches to the problem of action improvement.
Cite
@article{arxiv.hep-lat/9812014,
title = {Testing the efficiency of different improvement programs},
author = {Sergio Caracciolo and Andrea Montanari and Andrea Pelissetto},
journal= {arXiv preprint arXiv:hep-lat/9812014},
year = {2011}
}
Comments
LaTex2e, 34 pages, 5 ps figures, uses epsf, epsfig, amsfont, cite.sty