Excited Baryons from the FLIC Fermion Action

Details Excited Baryons from the FLIC Fermion Action Excited Baryons from the FLIC Fermion Action

2002-10-24

arxiv.org/abs/hep-lat/0210042v1

Nucl.Phys.Proc.Suppl.119:293-295,2003

Physics

High Energy Physics

High Energy Physics - Lattice

3 pages, 3 figures, Lattice2002(QCD Spectrum and Quark Masses)

Scientific paper

10.1016/S0920-5632(03)01542-1

Masses of positive and negative parity excited nucleons and hyperons are calculated in quenched lattice QCD using an O(a^2) improved gluon action and a fat-link clover fermion action in which only the irrelevant operators are constructed with fat links. The results are in agreement with earlier N* simulations with improved actions, and exhibit a clear mass splitting between the nucleon and its parity partner, as well as a small mass splitting between the two low-lying J^P={1/2}^- N* states. Study of different Lambda interpolating fields suggests a similar splitting between the lowest two {1/2}^- Lambda* states, although the empirical mass suppression of the Lambda*(1405) is not seen.

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