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Baryon operators and baryon spectroscopy

✍ Scribed by S. Basak; R.G. Edwards; G.T. Fleming; U.M. Heller; A. Lichtl; C. Morningstar; D.G. Richards; I. Sato; S. Wallace

Publisher: Elsevier Science
Year: 2006
Tongue: English
Weight: 218 KB
Volume: 153
Category: Article
ISSN: 0920-5632
DOI: 10.1016/j.nuclphysbps.2006.01.040

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✦ Synopsis

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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