QCD Phase Shifts and Rising Total Cross-Sections
Abstract
Description
An attempt is made in QCD to explain the growth of total cross-sections with energy, without violating the Froissart bound. This is achieved by computing the phase shifts of elastic scatterings of partons rather than their amplitudes. To render that possible a general formalism of phase-shifts in QCD is developed. Computed to two-loop order, agreements with hadronic and virtual-photon total cross-sections are quite satisfactory. Predications for the slower rate of growth at higher energies are also presented.
13 pages with three postscript figures, composed in the Revtex preprint format. Some misprints of a previous version have been corrected here
13 pages with three postscript figures, composed in the Revtex preprint format. Some misprints of a previous version have been corrected here