Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2003-09-15
Phys.Rev. C69 (2004) 022201
Physics
Nuclear Physics
Nuclear Experiment
6 pages, 3 figures, submitted to PRC. Fixed typo in Table I
Scientific paper
10.1103/PhysRevC.69.022201
Recent polarization transfer measurements of the proton electromagnetic form factors yield very different results from previous Rosenbluth extractions. This inconsistency implies uncertainties in our knowledge of the form factors and raises questions about how to best combine data from these two techniques. If the discrepancy is due to missing correction to the cross section data, as has been suggested, then different applications will require the use of different form factors. We present two extractions of the form factors: a global fit to the world's cross section data, and a combined extraction from polarization transfer and cross section data. The former provides a parametrization of the elastic electron-proton cross section, while the latter provides a consistent extraction of the underlying form factors, under the assumption that missing terms in the radiative correction explain the difference between the cross section and polarization transfer results.
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