Exact evaluation of box diagram in the elastic electron-proton scattering
Abstract
We present an exact method for evaluation of box diagram in the elastic electron-proton scattering. Using analytic properties of the proton form factors, we express the amplitude via twofold integral, which involves the form factors in the space-like region only. Therefore experimentally measured form factors can be used in the calculations directly. The numerical calculation is done with the form factors extracted by Rosenbluth as well as by polarization transfer methods. The dependence of the results on the form factor choice is small for Q^2 < 6 GeV^2, but becomes sizable at higher Q^2.Keywords
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