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Type: Journal article
Title: Spin-3/2 nucleon and Δ baryons in lattice QCD
Other Titles: Spin-3/2 nucleon and Delta baryons in lattice QCD
Author: Zanotti, J.
Leinweber, D.
Williams, A.
Zhang, J.
Melnitchouk, W.
Choe, S.
Citation: Physical Review. D. Particles, Fields, Gravitation and Cosmology, 2003; 68(5):054506-1-054506-8
Publisher: American Physical Soc
Issue Date: 2003
ISSN: 1550-7998
Statement of
J. M. Zanotti, D. B. Leinweber, A. G. Williams, and J. B. Zhang, W. Melnitchouk, S. Choe
Abstract: We present the first results for masses of spin-3/2 N and Δ baryons in lattice QCD using fat-link irrelevant clover fermions. Spin-3/2 interpolating fields, providing overlap with both spin-3/2 and spin-1/2 states, are considered. In the isospin-1/2 sector we observe, after appropriate spin and parity projection, a strong signal for the JP=3/2- state together with a weak but discernible signal for the 3/2+ state with a mass splitting near that observed experimentally. We also find good agreement between the 1/2± masses and earlier nucleon mass simulations with the standard spin-1/2 interpolating field. For the isospin-3/2 Δ states, clear mass splittings are observed between the various 1/2± and 3/2± channels, with the calculated level orderings in good agreement with those observed empirically.
Rights: ©2003 American Physical Society
RMID: 0020030892
DOI: 10.1103/PhysRevD.68.054506
Appears in Collections:Physics publications

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