The issues involved in a determination of the baryon resonance spectrum in lattice QCD are discussed. The variational method is introduced and the need to construct a sufficient basis of interpolating operators is emphasised. The construction of baryon operators using group-theory techniques is outl
Baryon operators and spectroscopy in lattice QCD
โ Scribed by S. Basak; R. Edwards; R. Fiebig; G. Fleming; U.M. Heller; C. Morningstar; D. Richards; I. Sato; S. Wallace
- Publisher
- Elsevier Science
- Year
- 2004
- Tongue
- English
- Weight
- 555 KB
- Volume
- 128
- Category
- Article
- ISSN
- 0920-5632
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โฆ Synopsis
The construction of the operators and correlators required to determine the excited baryon spectrum is presented, with the aim of exploring the spatial and spin structure of the states while minimizing the number of propagator inversions. The method used to construct operators that transform irreducibly under the symmetries of the lattice is detailed, and the properties of example operators is studied using domain-wall fermion valence propagators computed on MILC asqtad dynamical lattices.
๐ SIMILAR VOLUMES
We investigate the baryon mass spectrum in quenched lattice QCD with exact chiral symmetry. For 100 gauge configurations generated with Wilson gauge action at ฮฒ = 6.1 on the 20 3 ร40 lattice, we compute (point-to-point) quark propagators for 30 quark masses in the range 67 MeV โค m q โค 1790 MeV. For