Real Part of the Proton-Proton Forward-Scattering Amplitude from 50 to 400 GeV
Abstract
From measurements of proton-proton elastic scattering at very small momentum transfers where the nuclear and Coulomb amplitudes interfere, we have deduced values of ρ, the ratio of the real to the imaginary forward nuclear amplitude, for energies from 50 to 400 GeV. We find that ρ increases from -0.157 +/- 0.012 at 51.5 GeV to +0.039 +/- 0.012 at 393 GeV, crossing zero at 280 +/- 60 GeV.
- Publication:
-
Physical Review Letters
- Pub Date:
- November 1973
- DOI:
- 10.1103/PhysRevLett.31.1367
- Bibcode:
- 1973PhRvL..31.1367B