Chiral extrapolations for nucleon electric charge radii

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dc.contributor.authorHall, J.
dc.contributor.authorLeinweber, D.
dc.contributor.authorYoung, R.
dc.contributor.organisationSpecial Research Centre for the Subatomic Structure of Matter
dc.date.issued2013
dc.description.abstractLattice 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.
dc.description.statementofresponsibilityJ. M. M. Hall, D. B. Leinweber, and R. D. Young
dc.identifier.citationPhysical Review D: Particles, Fields, Gravitation and Cosmology, 2013; 88(1):1-9
dc.identifier.doi10.1103/PhysRevD.88.014504
dc.identifier.issn1550-7998
dc.identifier.issn1550-2368
dc.identifier.orcidHall, J. [0000-0002-7719-1103]
dc.identifier.orcidLeinweber, D. [0000-0002-4745-6027]
dc.identifier.orcidYoung, R. [0000-0002-4527-1811]
dc.identifier.urihttp://hdl.handle.net/2440/79915
dc.language.isoen
dc.publisherAmerican Physical Soc
dc.relation.granthttp://purl.org/au-research/grants/arc/DP110101265
dc.relation.granthttp://purl.org/au-research/grants/arc/FT120100821
dc.relation.granthttp://purl.org/au-research/grants/arc/FT120100821
dc.rights© 2013 American Physical Society
dc.source.urihttps://doi.org/10.1103/physrevd.88.014504
dc.titleChiral extrapolations for nucleon electric charge radii
dc.typeJournal article
pubs.publication-statusPublished

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