The two-photon exchange contribution to elastic electron-nucleon scattering at large momentum transfer

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dc.creatorAfanasev, Andrei V.
dc.creatorBrodsky, Stanley J.
dc.creatorCarlson, Carl E.
dc.creatorChen, Yu-Chun
dc.creatorVanderhaeghen, Marc
dc.date2005-02-01
dc.date.accessioned2026-07-07T11:31:45Z
dc.date.available2026-07-07T11:31:45Z
dc.descriptionWe estimate the two-photon exchange contribution to elastic electron-proton scattering at large momentum transfer by using a quark-parton representation of virtual Compton scattering. We thus can relate the two-photon exchange amplitude to the generalized parton distributions which also enter in other wide angle scattering processes. We find that the interference of one- and two-photon exchange contribution is able to substantially resolve the difference between electric form factor measurements from Rosenbluth and polarization transfer experiments. Two-photon exchange has additional consequences which could be experimentally observed, including nonzero polarization effects and a positron-proton/electron-proton scattering asymmetry. The predicted Rosenbluth plot is no longer precisely linear; it acquires a measurable curvature, particularly at large laboratory angle.
dc.description38 pages, 22 figures
dc.identifierhttps://arxiv.org/abs/hep-ph/0502013
dc.identifierhttp://arxiv.org/abs/hep-ph/0502013
dc.identifierPhys.Rev.D72:013008,2005
dc.identifierdoi:10.1103/PhysRevD.72.013008
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/197369
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleThe two-photon exchange contribution to elastic electron-nucleon scattering at large momentum transfer
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