Physics Letters B
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.
Original Publication Citation
Göckeler, M., Horsley, R., Pleiter, D., Rakow, P. E. L., Schierholz, G., Maynard, C. M., & Richards, D. G. (2002). Negative-parity baryon masses using an O(a)-improved fermion action. Physics Letters B, 532(1–2), 63-70. doi:https://doi.org/10.1016/S0370-2693(02)01492-2
Göckeler, M.; Horsley, R.; Pleiter, D.; Rakow, P. E. L.; Schierholz, G.; Maynard, C. M.; and Richards, D. G., "Negative-Parity Baryon Masses Using an O(a)-Improved Fermion Action" (2002). Physics Faculty Publications. 108.