Deeply Inelastic Proton-Proton Collisions

We measured the differential cross section for 12.4-GeV/c proton-proton inelastic scattering on circles of fixed energy loss in the c.m. system. We varied the inelasticity from 8 to 94% and covered much of the angular range. For essentially all inelasticities the dependence on ${P_{\perp }}^2$ is approximately $e^{-3\mathrm{}{P_{\perp }}^2}$. The absolute value of $\frac{d^2\sigma }{d\Omega \mathrm{dp}}$ also depends only weakly on energy loss.