2011/12/01 by John Bulava, Bulava, John · 1 citation
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat
paper · pdf · doi:10.48550/arxiv.1112.0212
14 pages, 13 figures, Proceedings from Lattice 2011, Lake Tahoe, CA, USA
openalex publication_date 2011/12/01 · arxiv created 2011/12/06 · arxiv updated 2011/12/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The study of excited hadron spectra using Lattice QCD is currently evolving. An important step toward obtaining resonance parameters from Lattice QCD is the calculation of finite volume energy spectra. Somewhat more rigorous studies of finite volume spectra are currently possible and should be completed in the near future. The inclusion of disconnected diagrams is increasingly commonplace and the simplest systems which involve mixing between single- and multi-hadron interpolating fields are being studied. Advances in all-to-all algorithms which have been crucial in this progress are reviewed and a survey of current results is given. Nevertheless, such results are preliminary and a thorough discussion of systematic errors is required. We discuss several such sources of error, focusing on excited state contamination and the use of the generalized eigenvalue problem. Also, the calculation of matrix elements between finite volume Hamiltonian eigenstates is discussed.