Negative-Parity Baryon Spectroscopy

Details Negative-Parity Baryon Spectroscopy Negative-Parity Baryon Spectroscopy

1998-09-14

arxiv.org/abs/hep-lat/9809095v2

Nucl.Phys.Proc.Suppl.73:258-260,1999

Physics

High Energy Physics

High Energy Physics - Lattice

LATTICE98(spectrum), 3 pages, 1 figure; minor typos corrected

Scientific paper

10.1016/S0920-5632(99)85041-5

Results are reported for the first calculation of the low-lying spin-1/2 odd-parity octet baryon masses using ${\cal O}(a^2)$ improved gluon and fermion actions. Methods for removing even-parity ground-state contaminations from the two-point correlation functions at zero and finite momenta are outlined. We investigate the properties of two odd-parity interpolating fields based on the established interpolating fields for the nucleon ground state. Isolation of the lowest-lying odd-parity state appears to be sufficient to begin exploring odd-parity $N \to N^*$ electromagnetic transition form factors.

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