We present first results for masses of positive and negative parity excited baryons in lattice QCD using an O(a^2) improved gluon action and a Fat Link Irrelevant Clover (FLIC) fermion action in which only the irrelevant operators are constructed with fat links. The results are in agreement with earlier calculations of N^* resonances using improved actions and exhibit a clear mass splitting between the nucleon and its chiral partner, even for the Wilson fermion action. The results also indicate a splitting between the lowest J^P = 1/2^- states for the two standard nucleon interpolating fields.
Cite
@article{arxiv.hep-lat/0201005,
title = {Baryon resonances from a novel fat-link fermion action},
author = {W. Melnitchouk and S. Bilson-Thompson and F. D. R. Bonnet and P. D. Coddington and D. B. Leinweber and A. G. Williams and J. M. Zanotti and J. B. Zhang and F. X. Lee},
journal= {arXiv preprint arXiv:hep-lat/0201005},
year = {2017}
}
Comments
5 pages, 3 figures, talk given by W.Melnitchouk at LHP 2001 workshop, Cairns, Australia