Two-photon exchange in elastic electron-proton scattering : QCD factorization approach
High Energy Physics - Phenomenology
2009-09-02 v1
Abstract
We estimate the two-photon exchange contribution to elastic electron-proton scattering at large momentum transfer . It is shown that the leading two-photon exchange amplitude behaves as relative to the one-photon amplitude, and can be expressed in a model independent way in terms of the leading twist nucleon distribution amplitudes. Using several models for the nucleon distribution amplitudes, we provide estimates for existing data and for ongoing experiments.
Cite
@article{arxiv.0905.0282,
title = {Two-photon exchange in elastic electron-proton scattering : QCD factorization approach},
author = {Nikolai Kivel and Marc Vanderhaeghen},
journal= {arXiv preprint arXiv:0905.0282},
year = {2009}
}
Comments
4 pages, 4 figures