The Two-Boson-Exchange Correction to Parity-Violating Elastic Electron-Proton Scattering

2009/01/15 by Shin Nan Yang, Yang, Shin Nan, Keitaro Nagata +5
Physics and Astronomy · #Atomic and Subatomic Physics Research #FOS: Physical sciences #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.0901.2320

openalex publication_date 2009/01/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We calculate the two-boson-exchange (TBE) corrections to the parity-violating asymmetry of the elastic electron-proton scattering in a simple hadronic model including the nucleon and the Δ(1232) intermediate states. We find that Δ contribution δ_Δ is, in general, comparable with the nucleon contribution δ_N and the current experimental measurements of strange-quark effects in the proton neutral weak current. The total TBE corrections to the current extracted values of G^s_E+βG^s_M in recent experiments are found to lie in the range of -7∼ +7%.

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