Zusammenfassung
We resent 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 ...
Zusammenfassung
We resent 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. (C) 2002 Elsevier Science B.V. All rights reserved.
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