Negative-parity Baryon Masses using an O(a)-improved Fermion Action
High Energy Physics - Lattice
2012-08-27 v2 High Energy Physics - Phenomenology
Nuclear Theory
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.
Keywords
Cite
@article{arxiv.hep-lat/0106022,
title = {Negative-parity Baryon Masses using an O(a)-improved Fermion Action},
author = {LHPC Collaboration and QCDSF Collaboration and UKQCD Collaboration and M. Gockeler and R. Horsley and C. M. Maynard and D. Pleiter and P. E. L. Rakow and D. G. Richards and G. Schierholz},
journal= {arXiv preprint arXiv:hep-lat/0106022},
year = {2012}
}
Comments
13 pages, 8 figures, revtex Version accepted for publication in Physics Letters B. Some changes to discussion of chiral extrapolations; primary results unchanged