General analysis of polarization phenomena in e++e- N+ N for axial parametrization of two--photon exchange
G. I. Gakh, E. Tomasi-Gustafsson
Abstract
General properties of the differential cross section and of the polarization observables are derived for the e++e- N+ N reaction, in presence of two--photon exchange. Polarization effects are investigated for longitudinally polarized electron and polarized antinucleon and/or polarized nucleon in the final state. The single--spin asymmetry induced by the transverse polarization of the electron beam is also discussed.
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