Calculation of two-photon exchange effects for $\Delta$ production in electron-proton collisions
Nuclear Theory
2008-11-26 v3
Abstract
We present an evaluation of a two-photon exchange correction to the cross section for unpolarized isobar production in electron-proton collisions, using a relativistic, crossing symmetric and gauge invariant approach. The calculated box and crossed-box diagrams include nucleon and intermediate states. We find a relation between the angular nonlinearity of the two-photon exchange contribution and the value of the coupling constant.
Keywords
Cite
@article{arxiv.nucl-th/0601063,
title = {Calculation of two-photon exchange effects for $\Delta$ production in electron-proton collisions},
author = {S. Kondratyuk and P. G. Blunden},
journal= {arXiv preprint arXiv:nucl-th/0601063},
year = {2008}
}
Comments
10 pages, 2 figures, RevTeX4; more detailed discussion, results unchanged; to be published in Nucl.Phys.A