Excited-State Hadron Masses from Lattice QCD

Details Excited-State Hadron Masses from Lattice QCD Excited-State Hadron Masses from Lattice QCD

2011-09-01

arxiv.org/abs/1109.0308v1

Physics

High Energy Physics

High Energy Physics - Lattice

3 pages, 4 figures, talk presented at the 19th Particles & Nuclei International Conference (PANIC 2011), Massachusetts Institu

Scientific paper

Progress in computing the spectrum of excited baryons and mesons in lattice QCD is described. Large sets of spatially-extended hadron operators are used. The need for multi-hadron operators in addition to single-hadron operators is emphasized, necessitating the use of a new stochastic method of treating the low-lying modes of quark propagation which exploits Laplacian Heaviside quark-field smearing. A new glueball operator is tested, and computing the mixing of this glueball operator with a quark-antiquark operator and multiple two-pion operators is shown to be feasible.

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