QCD Amplitudes in the High-Energy Limit
arXiv:hep-ph/9902211
Abstract
Dijet production with a rapidity gap between the jets is considered as a test ground for the production of a heavy Higgs boson via weak-boson fusion at hadron supercolliders. It is argued that in order to perform a detailed analysis of dijet production with a rapidity gap we need an ${\cal O}(\al_s^4)$ calculation including the relevant collinear enhancements which give structure to the jets. Such a calculation needs not be exact, but must include the full leading power in of the rate of dijet production in the high-energy limit. The QCD amplitudes must be determined to the corresponding accuracy. Accordingly, the scattering amplitudes necessary to compute the full leading power in of dijet production to ${\cal O}(\al_s^3)$ are analysed.
LaTeX, 18 pages. To appear in the Proceedings of LISHEP98, Rio, Brasil, February 1998