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Model independent properties of two-photon exchange in elastic electron proton scattering

Michail P. Rekalo, Egle Tomasi-Gustafsson

nucl-tharXiv:nucl-th/0307066

Abstract

We derive from first principles, as the C-invariance of the electromagnetic interaction and the crossing symmetry, the general properties of two-photon exchange in electron-proton elastic scattering. We show that the presence of this mechanism destroys the linearity of the Rosenbluth separation.

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