Highenergy scattering of quarks in gauge theories
Abstract
Highenergy quarkquark scattering is calculated in quantum chromodynamics (QCD) using the infrared equation of Cornwall and Tiktopoulos. In contrast to ordinary quantum electrodynamics, the highenergy behavior is determined by the infrared structure. The infrared divergence is regulated by introduction of a small gluon mass; the amplitudes obtained agree with previous perturbation calculations (for t fixed, s>∞) in QCD modified by the addition of a Higgs meson in the limit of small gluon mass. A proposal to calculate the infraredfinite behavior at fixed angle using asymptotic freedom is made, based on the hypothesis that the infrared divergence can be factored from an infraredfinite and renormalizationpointdependent part. The latter is calculable for the colorless exchange amplitude but not for the color exchange amplitude.
 Publication:

Physical Review D
 Pub Date:
 June 1977
 DOI:
 10.1103/PhysRevD.15.3675
 Bibcode:
 1977PhRvD..15.3675C