Charge Radii of the Meson and Baryon Octets in Quenched and Partially Quenched Chiral Perturbation Theory

Abstract

We calculate the electric charge radii of the SU(3) pseudoscalar mesons and the SU(3) octet baryons in quenched and partially quenched chiral perturbation theory. We work in the isospin limit, up to next-to-leading order in the chiral expansion, and to leading order in the heavy baryon expansion. The results are necessary for the extrapolation of future lattice calculations of meson and baryon charge radii. We also derive expressions for the nucleon and pion charge radii in SU(2) flavor away from the isospin limit.

arXiv comment19 pages, 4 eps figures, revtex4; minor changes, typos corrected, version to appear in Physical Review D

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• The pion's electromagnetic form factor at small momentum transfer in full lattice QCD
• High-precision calculation of the strange nucleon electromagnetic form factors
• Electromagnetic and spin polarisabilities in lattice QCD
• Twist-two matrix elements at finite and infinite volume
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• Decuplet Baryon Masses in Partially Quenched Chiral Perturbation Theory
• Chiral extrapolation of octet-baryon charge radii
• Baryons with Ginsparg-Wilson quarks in a staggered sea
• Universality of Mixed Action Extrapolation Formulae
• Strange Baryon Electromagnetic Form Factors and SU(3) Flavor Symmetry Breaking
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• Chiral extrapolation of nucleon magnetic moments at next-to-leading-order
• Connected Parts of Decuplet Electromagnetic Properties
• Flavor Twisted Boundary Conditions in the Breit Frame
• Lattice Results on the Connected Neutron Charge Radius
• Finite Volume Effects on the Extraction of Form Factors at Zero Momentum
• Hadronic Electromagnetic Properties at Finite Lattice Spacing
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• Chiral Perturbation Theory on the Lattice and its Applications
• Light-Front Dynamics and Generalized Parton Distributions