Total cross-sections

Abstract

A unified approach to total cross-sections, based on the QCD contribution to the rise with energy, is presented for the processes pp, pp̅, γp, γγ, e⁺e^-→ hadrons. For proton processes, a discussion of the role played by soft gluon summation in taming the fast rise due to mini-jets is presented. For photonphoton processes, a comparison with other models indicates the need for precision measurements in both the low and high energy region, likely only with measurements at future Linear Colliders.