Two-Loop Formfactors in Theories with Mass Gap and Z-Boson Production
Abstract
The two-loop formfactor both for a U(1)xU(1) and a SU(2)xU(1) gauge theory with massive and massless gauge bosons respectively is evaluated at arbitrary momentum transfer q2. The asymptotic behaviour for q2->∈finity is compared to a recent calculation of Sudakov logarithms. The result is an important ingredient for the calculation of radiative corrections to Z-boson production at hadron and lepton colliders.
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