The hadron mass spectrum is calculated in lattice QCD using a novel fat-link clover fermion action in which only the irrelevant operators in the fermion action are constructed using smeared links. The simulations are performed on a 16^3 x 32 lattice with a lattice spacing of a=0.125 fm. We compare actions with n=4 and 12 smearing sweeps with a smearing fraction of 0.7. The n=4 Fat-Link Irrelevant Clover (FLIC) action provides scaling which is superior to mean-field improvement, and offers advantages over nonperturbative 0(a) improvement, including a reduced exceptional configuration problem.
@article{arxiv.hep-lat/0110216,
title = {Hadron Masses From Novel Fat-Link Fermion Actions},
author = {J. M. Zanotti and S. Bilson-Thompson and F. D. R. Bonnet and P. D. Coddington and D. B. Leinweber and A. G. Williams and J. B. Zhang and W. Melnitchouk and F. X. Lee},
journal= {arXiv preprint arXiv:hep-lat/0110216},
year = {2008}
}
Comments
12 pages, 4 figures, new simulation with mean-field improved clover, further discussion of action