%0 Journal Article
%T Spectrum of excited states using the stochastic LapH method
%A John Bulava
%A Brendan Fahy
%A Justin Foley
%A You-Cyuan Jhang
%A Keisuke J. Juge
%A David Lenkner
%A Colin Morningstar
%A Chik Him Wong
%J Physics
%D 2013
%I arXiv
%X Progress in computing the spectrum of excited baryons and mesons in lattice QCD is described. Our first results in the zero-momentum bosonic I=1, S=0, T1u+ symmetry sector of QCD using a correlation matrix of 56 operators are presented. In addition to a dozen spatially-extended meson operators, 44 two-meson operators are used, involving a wide variety of light isovector, isoscalar, and strange meson operators of varying relative momenta. All needed Wick contractions are efficiently evaluated using a stochastic method of treating the low-lying modes of quark propagation that exploits Laplacian Heaviside quark-field smearing. Level identification is discussed.
%U http://arxiv.org/abs/1310.7887v1