The assertion in a recent letter by Saperstein of the failure of the Glauber scattering formalism in describing forward angle $p-{}_{}{}^4{}_{}{}^{}\mathrm{He}$ elastic scattering is pointed out to be incorrect. The single scattering optical potential described there is at best no better than the Glauber formalism in describing elastic $p$-nucleus scattering at high energies.

NUCLEAR REACTIONS ${}_{}{}^4{}_{}{}^{}\mathrm{He}\mathrm{}(p,p)\mathrm{}$; $E=1\mathrm{}$ GeV, $\sigma \left(\theta \right)$. Watson single scattering potential and Glauber multiple scattering amplitude analyses equivalent.

• Received 18 October 1973

DOI:https://doi.org/10.1103/PhysRevC.10.928