Shrinkage of the Diffraction Pattern and Short-Range Forces

Abstract

ABS>The observed shrinkage of the diffraction pattern in p-p, but not in pi /sup -/--p, scattering is considered. Representation of the pi /sup -/-p differential cross section in terms of the Pomeranchuk trajectory alone is shown to give good agreement with diffraction data. In p-p scattering the Pomeranchuk term determines the low momentum transfer behavior of the cross section, while at about 10 Bev/c the term due to omega exchange (not present in pi /sup -/-p) becomes important. omega -exchange is also present in K/sup plus or minus /-p scattering; this diffraction pattern should show shrinkage similar to the p-p and p-p shrinkage. (D.C.W.)