Coulomb corrections in the extraction of the proton radius

2012/10/09 by J. Arrington, John Arrington, Arrington, John · 1 citation
Engineering · Physics and Astronomy · #Atomic and Molecular Physics #FOS: Physical sciences #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #Particle Accelerators and Free-Electron Lasers #Solar and Space Plasma Dynamics #nucl-ex #nucl-th

paper · pdf · doi:10.48550/arxiv.1210.2677

4 pages, 3 figures, submitted to J. Phys. G

openalex publication_date 2012/10/09 · arxiv created 2013/09/06 · arxiv updated 2013/09/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

Multi-photon exchange contributions are important in extracting the proton charge radius from elastic electron--proton scattering. So far, only diagrams associated with the exchange of a second photon have been evaluated. At the very low Q² values relevant to the radius extraction, higher order contributions may become important. We evaluate these corrections in the Effective Momentum Approximation, which includes the Coulomb interaction to all orders, and find small corrections with a strong Q² dependence at low Q² and large scattering angles. This suggests that the higher order terms may be important in the evaluation of the proton magnetic radius.

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• Proton Charge Radius and Precision Tests of QED

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