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Type: Journal article
Title: Precision electromagnetic structure of octet baryons in the chiral regime
Author: Boinepalli, S.
Leinweber, D.
Williams, A.
Zanotti, J.
Zhang, J.
Citation: Physical Review. D. Particles, Fields, Gravitation and Cosmology, 2006; 74(9):093005-1-093005-29
Publisher: American Physical Soc
Issue Date: 2006
ISSN: 1550-7998
Statement of
S. Boinepalli, D. B. Leinweber, A. G. Williams, J. M. Zanotti, and J. B. Zhang
Abstract: The electromagnetic properties of the baryon octet are calculated in quenched QCD on a 203×40 lattice with a lattice spacing of 0.128 fm using the fat-link irrelevant clover (FLIC) fermion action. FLIC fermions enable simulations to be performed efficiently at pion masses as low as 300 MeV. By combining FLIC fermions with an improved-conserved vector current, we ensure that discretization errors occur only at [script O](a2) while maintaining current conservation. Magnetic moments and electric and magnetic radii are extracted from the electric and magnetic form factors for each individual quark sector. From these, the corresponding baryon properties are constructed. Our results are compared with the predictions of quenched chiral perturbation theory. We detect substantial curvature and environment sensitivity of the quark contributions to electric charge radii and magnetic moments in the low quark-mass region.
Rights: ©2006 American Physical Society
RMID: 0020061941
DOI: 10.1103/PhysRevD.74.093005
Appears in Collections:Physics publications

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