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

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

2003-07-02

arxiv.org/abs/hep-lat/0307003v2

Phys.Rev. D68 (2003) 094501

Physics

High Energy Physics

High Energy Physics - Lattice

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

Scientific paper

10.1103/PhysRevD.68.094501

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.

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