Model-independent determination of the hadron elastic scattering at high energy and small momentum transfer

It is shown that the measurement of the polarization together with the hadron elastic dNdt distribution in the Coulomb-nuclear interference region allows to extract directly from the data both the real and imaginary parts of the spin non-flip nuclear amplitude, independently from each other and without any arbitrary theoretical assumption. The crucial parameter ϱ = Re FIM F will be therefore known as a function of t at fixed s and will allow us to detect new phenomena in hadron physics.