Calculation of the real part of the nuclear amplitude at high s and   small t from the Coulomb amplitude
  A new method for the determination of the real part of the elastic scattering amplitude is examined for high energy proton-proton at small momentum transfer. This method allows us to decrease the number of model assumptions, to obtain the real part in a narrow region of momentum transfer and to test different models. The possible non-exponential behavior of the real part was found on the base of the analysis of the ISR experimental data. 
P. Gauron, B. Nicolescu, O.V. Selyugin