Isospin violation in the vector form factors of the nucleon

Abstract

A quantitative understanding of isospin violation is an increasingly important ingredient for the extraction of the nucleon's strange vector form factors from experimental data. We calculate the isospin violating electric and magnetic form factors in chiral perturbation theory to leading and next-to-leading order respectively, and we extract the low-energy constants from resonance saturation. Uncertainties are dominated largely by limitations in the current knowledge of some vector meson couplings. The resulting bounds on isospin violation are sufficiently precise to be of value to on-going experimental studies of the strange form factors.

arXiv comment13 pages, 8 figures, uses RevTeX

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• Charge Symmetry Violation in the Electromagnetic Form Factors of the Proton
• Charge Symmetry Breaking and Parity Violating Electron Scattering
• The Beauty of Spin
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• Charge Symmetry Breaking in Electromagnetic Nucleon Form Factors in Elastic Parity-Violating Electron-Nucleus Scattering
• Future Directions in Parity Violation: From Quarks to the Cosmos
• Charge symmetry violation in the determination of strangeness form factors
• Theory of QED radiative corrections to neutrino scattering at accelerator energies
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