Baryon Operators and Baryon Spectroscopy

Details Baryon Operators and Baryon Spectroscopy Baryon Operators and Baryon Spectroscopy

2006-01-26

arxiv.org/abs/hep-lat/0601034v1

Nucl.Phys.Proc.Suppl.153:242-249,2006

Physics

High Energy Physics

High Energy Physics - Lattice

Invited talk at Workshop on Computational Hadron Physics, Cyprus, Sept. 14-17, 2005

Scientific paper

10.1016/j.nuclphysbps.2006.01.04

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.

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