Negative-parity baryon masses using an /O(a)-improved fermion action
Abstract
We present a calculation of the mass of the lowest-lying negative-parity J=1/2- state in quenched QCD. Results are obtained using a non-perturbatively O(a)-improved clover fermion action, and a splitting is found between the mass of the nucleon, and its parity partner. The calculation is performed on two lattice volumes and at three lattice spacings, enabling a study of both finite-volume and finite lattice-spacing uncertainties. A comparison is made with results obtained using the unimproved Wilson fermion action.
- Publication:
-
Physics Letters B
- Pub Date:
- April 2002
- DOI:
- arXiv:
- arXiv:hep-lat/0106022
- Bibcode:
- 2002PhLB..532...63G
- Keywords:
-
- High Energy Physics - Lattice;
- High Energy Physics - Phenomenology;
- Nuclear Theory
- E-Print:
- 13 pages, 8 figures, revtex Version accepted for publication in Physics Letters B. Some changes to discussion of chiral extrapolations
