Our progress in computing the spectrum of excited baryons and mesons in lattice QCD is described. Sets of spatially-extended hadron operators with a variety of different momenta are used. A new method of stochastically estimating the low-lying effects of quark propagation is utilized which allows reliable determinations of temporal correlations of both single-hadron and multi-hadron operators. The method is tested on the isoscalar mesons in the scalar, pseudoscalar, and vector channels, and on the two-pion system of total isospin I=0,1,2.
@article{arxiv.1103.2783,
title = {Progress Report on Computing Excited-State Hadron Masses in Lattice QCD},
author = {C. Morningstar and A. Bell and J. Bulava and J. Foley and K. J. Juge and D. Lenkner and C. H. Wong},
journal= {arXiv preprint arXiv:1103.2783},
year = {2015}
}
Comments
7 pages, 4 figures, talk given at the International Conference on the Structure of Baryons, Osaka, Japan, Dec 7-11, 2010