Box diagram in the elastic electron-proton scattering

Details Box diagram in the elastic electron-proton scattering Box diagram in the elastic electron-proton scattering

2006-06-19

arxiv.org/abs/nucl-th/0606030v3

Phys.Rev.C74:065203,2006

Physics

Nuclear Physics

Nuclear Theory

Misprints corrected, two Appendices with technical details added

Scientific paper

10.1103/PhysRevC.74.065203

We present an evaluation of box diagram for the elastic $ep$ scattering with proton in the intermediate state. 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 $Q^2$.

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