Proton-proton and proton-deuteron elastic scattering has been measured for incident laboratory energy from 50 to 400 GeV; minimum |*| values were, for p-p, 0.0005 (GeV/ c) 2 , and for p-d, 0.0008 (GeV/c) 2 . From the differential cross sections we have determined the ratios of the real to imaginary parts of the forward scattering amplitude, ppp and p pd , for p-p and p-d scattering. Using a Glauber approach and a sum-of-exponentials form factor we obtain p pn for p-n scattering.Dubna,

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