High-Energy Elastic Proton-Proton Scattering

l) has given a descrption of the elastic pp scattering cross section at rs = 53 Ge V in terms of a G lauber 2 ) model of multiple scattering in which each proton has three internal constituents which are presumably quarks. The basic constitu· ent (i.e., quark-quark) scattering amplitude used is taken to be color independent and is parameterized to fit the observed cross sec­ tion. The purpose of this short note is to point out an error in Wakaizumi's calculation and to show that an undesirable diffraction structure associated with a second minimum not seen experimentally3) appears in his theo­ ry when neglected double- and triple-scatter­ ing terms are included. We are unable to remove this undesirable diffraction structure by a readjustment of model parameters. Wakaizumi's pop elastic scattering ampli­ tude