Abstract
A Regge eikonal model with an explicit mechanism for diffractive dissociation is compared in detail with the ISR data on pp total and differential cross sections for elastic scattering. The proton and its diffractive excitations are taken to be superpositions of “diffractive eigenstates” which scatter only elastically or non-diffractively. The eikonals for the scattering of these states are assumed to be dominated by a pomeron Regge pole with simple exponential residues. The data are consistent with a pomeron of near-zero slope and intercept 1.05 so that the characteristic features of the differential cross sections are due to absorption. The diffractive dissociation amplitudes needed to obtain agreement with the elastic data reproduce the basic features of the data on low-mass diffractive dissociation.
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