Progress in calculating the spectrum of excited baryons and mesons in lattice QCD is described. Correlation matrices of sets of spatially-extended hadron operators have been studied and their effectiveness in facilitating the extraction of excited-state energies is demonstrated. First applications of the stochastic LapH method, a new method of estimating the low-lying effects of quark propagation, are presented.
@article{arxiv.1011.6573,
title = {The excited hadron spectrum in lattice QCD using a new variance reduction method},
author = {Colin Morningstar and A. Bell and C. Y. Chen and D. Lenkner and C. H. Wong and J. Bulava and J. Foley and K. J. Juge and M. Peardon},
journal= {arXiv preprint arXiv:1011.6573},
year = {2010}
}
Comments
4 pages, 2 figures, talk presented at ICHEP 2010, Paris, France, July 22-28, 2010