Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/79915
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Type: Journal article
Title: Chiral extrapolations for nucleon electric charge radii
Author: Hall, J.
Leinweber, D.
Young, R.
Citation: Physical Review. D. Particles, Fields, Gravitation and Cosmology, 2013; 88(1):1-9
Publisher: American Physical Soc
Issue Date: 2013
ISSN: 1550-7998
1550-2368
Organisation: Special Research Centre for the Subatomic Structure of Matter
Statement of
Responsibility: 
J. M. M. Hall, D. B. Leinweber, and R. D. Young
Abstract: Lattice simulations for the electromagnetic form factors of the nucleon yield insights into the internal structure of hadrons. The logarithmic divergence of the charge radius in the chiral limit poses an interesting challenge in achieving reliable predictions from finite-volume lattice simulations. Recent results near the physical pion mass (m(π)∼180 MeV) are examined in order to confront the issue of how the chiral regime is approached. The electric charge radius of the nucleon isovector presents a forum for achieving consistent finite-volume corrections. Newly developed techniques within the framework of chiral effective field theory (χEFT) are used to achieve a robust extrapolation of the electric charge radius to the physical pion mass and to infinite volume. The chiral extrapolations exhibit considerable finite-volume dependence; lattice box sizes of L≳7 fm are required in order to achieve a direct lattice simulation result within 2% of the infinite-volume value at the physical point. Predictions of the volume dependence are provided to guide the interpretation of future lattice results.
Rights: © 2013 American Physical Society
RMID: 0020130779
DOI: 10.1103/PhysRevD.88.014504
Grant ID: http://purl.org/au-research/grants/arc/DP110101265
http://purl.org/au-research/grants/arc/FT120100821
Appears in Collections:Special Research Centre for the Subatomic Structure of Matter publications

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