The excited hadron spectrum in lattice QCD using a new variance reduction method

The excited hadron spectrum in lattice QCD using a new variance reduction method

Progress in calculating the spectrum of excited baryons and mesons in lattice QCD is described. Correlation matrices of sets of spatially-extended hadron operators have been studied and their effectiveness in facilitating the extraction of excited-state energies is demonstrated. First applications o...

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Veröffentlicht in:arXiv.org 2010-11
Hauptverfasser: Morningstar, Colin, Bell, A, Chen, C Y, Lenkner, D, Wong, C H, Bulava, J, Foley, J, Juge, K J, Peardon, M
Format: Artikel
Sprache:eng
Schlagworte:
Excitation spectra
Mesons
Quantum chromodynamics
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Zusammenfassung:Progress in calculating the spectrum of excited baryons and mesons in lattice QCD is described. Correlation matrices of sets of spatially-extended hadron operators have been studied and their effectiveness in facilitating the extraction of excited-state energies is demonstrated. First applications of the stochastic LapH method, a new method of estimating the low-lying effects of quark propagation, are presented.
ISSN:2331-8422