2005/02/14 by Andrei Afanasev, Andrei V. Afanasev, Carl E. Carlson · 47 citations
Physics and Astronomy · #Asymmetry #Elastic scattering #Electron #Electron scattering #High-Energy Particle Collisions Research #Nuclear physics #Nucleon #Parity (physics) #Particle physics #Particle physics theoretical and experimental studies #Parton #Photon #Physics #Polarization (electrochemistry) #Proton #Quantum Chromodynamics and Particle Interactions #Quantum electrodynamics #Quantum mechanics #Quark #Scattering #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevlett.94.212301
published in Physical Review Letters 94(21), 212301 (American Physical Society) · 4 pages, 3 figures
arxiv created 2005/02/14 · openalex publication_date 2005/06/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Higher-order QED effects play an important role in precision measurements of nucleon elastic form factors in electron scattering. Here we introduce a two-photon-exchange QED correction to the parity-violating polarization asymmetry of elastic electron-proton scattering. We calculate this correction in the parton model using the formalism of generalized parton distributions, and demonstrate that it can reach several percent in certain kinematics, becoming comparable in size with existing experimental measurements of strange-quark effects in the proton neutral weak current.