Amplitude of Elastic Scattering for the Region of Large Impact Parameters

The work is dedicated to consequences of analyticity and unitarity of the scattering amplitude. Using the Gaussian quasipotential an equation for the scattering amplitude matrix is obtained and formula is derived for the cross sections. The dependence of the cross section and ratio of the real part of the amplitude in the forward scattering to its imaginary part of on the momentum are discussed. The steep Gaussian peak for cross section at small angles is followed by the exponential (Orear) regime. Results from theoretical approach are compared with experimental data