Differential cross sections and analyzing powers forppelastic scattering at 1.46 GeV/cin the Coulomb-nuclear interference region

Differential cross sections $\sigma \left(\theta \right)$ and analyzing powers $A\left(\theta \right)$ for $\mathrm{pp}$ elastic scattering have been measured in the Coulomb-nuclear interference region at 800 MeV. The measurements, which extend down to 0.5 deg in the laboratory, have been analyzed to deduce the zero-degree $\mathrm{pp}$ scattering amplitudes. The ratio $\rho$ of the real to imaginary parts of the spin-independent amplitude was found to be -0.04±0.04; the contribution of the double-spin-flip amplitudes to $\sigma \mathrm{}\left(0\right)\mathrm{}$ was found to be 0.16±0.03 times that of the spin-independent amplitude; while the ratios of the imaginary and real parts of the single spin-flip amplitude to $sin\theta$ were found to be 0.74±0.04 and -0.03±0.08 fm, respectively. Except for the last, these experimental values agree with the predictions of forward dispersion relations and phase shift analyses.