Excited baryons from the FLIC fermion action
Date
2003
Authors
Melnitchouk, W.
Hedditch, J.
Leinweber, D.
Williams, A.
Zanotti, J.
Zhang, J.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Conference paper
Citation
Nuclear Physics B - Proceedings Supplements, 2003, vol.119, pp.293-295
Statement of Responsibility
W. Melnitchouk, J.N. Hedditch, D.B. Leinweber, A.G. Williams, J.M. Zanotti and J.B. Zhang
Conference Name
20th International Symposium on Lattice Field Theory (24 Jun 2002 - 29 Jun 2002 : MIT, CAMBRIDGE, MA)
Abstract
Masses of positive and negative parity excited nucleons and hyperons are calculated in quenched lattice QCD using an O(a^2) improved gluon action and a fat-link clover fermion action in which only the irrelevant operators are constructed with fat links. The results are in agreement with earlier N* simulations with improved actions, and exhibit a clear mass splitting between the nucleon and its parity partner, as well as a small mass splitting between the two low-lying J^P={1/2}^- N* states. Study of different Lambda interpolating fields suggests a similar splitting between the lowest two {1/2}^- Lambda* states, although the empirical mass suppression of the Lambda*(1405) is not seen.
School/Discipline
Dissertation Note
Provenance
Description
Copyright © 2003 Published by Elsevier B.V. Printed in U.S.A. Submitted to Cornell University’s online archive www.arXiv.org in 2003 by James Zanotti. Post-print sourced from www.arxiv.org.