Progress in determining the spectrum of excited baryons and mesons in lattice QCD is described. Large sets of carefully-designed hadron operators have been studied and their effectiveness in facilitating the extraction of excited-state energies is demonstrated. A new method of stochastically estimating the low-lying effects of quark propagation is proposed which will allow reliable determinations of temporal correlations of single-hadron and multi-hadron operators.
@article{arxiv.1002.0818,
title = {The excited hadron spectrum in lattice QCD using a new method of estimating quark propagation},
author = {C. Morningstar and A. Bell and J. Bulava and E. Engelson and J. Foley and K. J. Juge and D. Lenkner and M. Peardon and S. Wallace and C. H. Wong},
journal= {arXiv preprint arXiv:1002.0818},
year = {2015}
}
Comments
5 pages, 4 figures, talk given at Hadron 2009, Tallahassee, Florida, December 1, 2009