Two-Loop Formfactors in Theories with Mass Gap and Z-Boson Production

Kotikov, A.; Kuhn, J. H.; Veretin, O.

Two-Loop Formfactors in Theories with Mass Gap and Z-Boson Production

Authors

Kotikov, A.

Kuhn, J. H.

Veretin, O.

Description

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 q^2. The asymptotic behaviour for q^2->\infinity 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.
16 pp., 2 ff