arXiv:1401.2544·v1·High Energy Physics — Lattice
Excited states in lattice QCD with the stochastic LapH method
John Bulava🇮🇪 · Brendan Fahy🇺🇸 · Justin Foley🇺🇸 · You-Cyuan Jhang🇺🇸 · Keisuke J. Juge🇺🇸 · David Lenkner🇺🇸 · Colin Morningstar🇺🇸 · Chik Him Wong🇺🇸
Abstract
Progress in computing the spectrum of excited baryons and mesons in lattice QCD is described. Results in the zero-momentum bosonic I=1/2, S=1, T1u symmetry sector of QCD using a correlation matrix of 58 operators are presented. 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 using probe operators is discussed.
Comments: 4 pages, 3 figures, talk presented at the 13th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU 2013), Sept 30 - Oct 4, 2013, Rome, Italy