Absolute differential cross section measurements for proton-proton elastic scattering at 647 and 800 MeV

Absolute differential cross sections for elastic proton-proton scattering have been measured in the center-of-mass angular interval from 20^∘{} to 90^∘{} at 647 and 800 MeV with overall uncertainties of ±{} (3-10)% and ±{} (3-5)%, respectively. The data at 800 MeV are the most accurate so far reported at that energy. Comparison is made to earlier measurements and contemporary phase-shift analyses.NUCLEAR REACTIONS ¹H(p,p)¹H, $E=647$, 800 MeV; measured σ(θ); θ=23^∘-90^∘, Δθ=3^∘.