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Baryon operators and spectroscopy in lattice QCD

โœ 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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โœฆ 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.


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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 ร—40 lattice, we compute (point-to-point) quark propagators for 30 quark masses in the range 67 MeV โ‰ค m q โ‰ค 1790 MeV. For