Ratios of the Real to Imaginary Part of the p(4)He and pn Elastic Scattering Amplitudes at 0.7 GeV

摘要

The ratios rho(pHe) and rho(pn) of the real to imaginary part of the forward proton-He-4 and proton-neutron elastic scattering amplitudes have been determined from the data on proton-helium elastic scattering cross sections at 0.7 GeV in the Coulomb-nuclear interference region to be rho(pHe) = -0.06 +/- 0.06 and rho(pn) = -0.28 +/- 0.12. The existing experimental values of rho(pHe) are compared in a wide range of energies with the corresponding values calculated by means of the Glauber model using the ratios rho(pp) and rho(pn) evaluated with the help of the dispersion relations.