THE PROCESS (P)OVER-BAR-P-]E-E-FACTORS IN TIME-LIKE REGION( WITH POLARIZED INITIAL PARTICLES AND PROTON FORM)

The process ppBAR --> e- e+ is considered in the general case of polar ized initial particles. A relation between the difference of the phase s of the electromagnetic form factors G(M) and G(E) in the time-like r egion and measurable asymmetries is derived. It is shown that the modu li of the form factors can be determined from measurements of the tota l unpolarized cross section and of the integral asymmetry for longitud inally polarized (or transversely polarized) pBAR and p. The behaviour of the proton form factors at high q2 in the time-like region is also discussed. From the Phragmen-Lindelof's theorem it follows that the a symptotical behaviour of the form factors in the space-like and time-l ike regions must be the same. An analysis of experimental data in both regions based on perturbative QCD is presented.