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

Differential cross sections σ(θ) and analyzing powers A(θ) for 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 pp scattering amplitudes. The ratio ρ 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 σ(0) 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 sinθ 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.NUCLEAR REACTIONS ¹H(p, p)¹H, $E=800$ MeV, measured σ(θ) and A(θ). Deduced zero-degree scattering amplitudes.