Extraction of two-photon contributions to the proton form factors
- 7 January 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review C
- Vol. 71 (1) , 015202
- https://doi.org/10.1103/physrevc.71.015202
Abstract
Significant discrepancies have been observed between proton form factors as measured by Rosenbluth separation and polarization transfer techniques. There are indications that this difference may be caused by corrections to the one-photon exchange approximation that are not taken into account in standard radiative correction procedures. In this paper, we constrain the two-photon amplitudes by combining data from Rosenbluth, polarization transfer, and positron-proton scattering measurements. This allows a rough extraction of these two-photon effects in elastic electron-proton scattering and provides an improved extraction of the proton electromagnetic form factors.Keywords
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This publication has 19 references indexed in Scilit:
- Measurements of electron-proton elastic cross sections forPhysical Review C, 2004
- Evidence for two-photon exchange contributions in electron-proton and positron-proton elastic scatteringPhysical Review C, 2004
- Implications of the discrepancy between proton form factor measurementsPhysical Review C, 2004
- Quasielasticreaction on, andPhysical Review C, 2003
- Two-Photon Exchange and Elastic Electron-Proton ScatteringPhysical Review Letters, 2003
- How to Reconcile the Rosenbluth and the Polarization Transfer Methods in the Measurement of the Proton Form FactorsPhysical Review Letters, 2003
- How well do we know the electromagnetic form factors of the proton?Physical Review C, 2003
- Measurement ofintoPhysical Review Letters, 2002
- Ratio by Polarization Transfer inPhysical Review Letters, 2000
- Radiative Corrections to Elastic and InelasticandScatteringReviews of Modern Physics, 1969