Predictions of polarization observables in by eight- and ten-resonance U&A models

Polarization effects in e + e − → p p ̄ process for longitudinally polarized proton/antiproton in the final state are reinvestigated and analyzed by eight- and ten-resonance unitary and analytic (U&A) models of nucleon electromagnetic structure. Explicit forms of components of the single-spin and double-spin polarization of the created proton/antiprotons are presented and their sensitivity of behavior is demonstrated graphically by using eight- and ten-resonance U&A models of the nucleon electromagnetic structure.