Baryon Operators and Baryon Spectroscopy
arXiv:hep-lat/0601034 · doi:10.1016/j.nuclphysbps.2006.01.040
Abstract
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 outlined. We find that the use both of quark-field smearing and link-field smearing in the operators is essential firstly to reduce the coupling of operators to high-frequency modes and secondly to reduce the gauge-field fluctuations in correlators. We conclude with a status report of our current investigation of baryon spectroscopy.
Invited talk at Workshop on Computational Hadron Physics, Cyprus, Sept. 14-17, 2005