  We study electroweak Sudakov corrections in high energy scattering, and the
cancellation between real and virtual Sudakov corrections. Numerical results
are given for the case of heavy quark production by gluon collisions involving
the rates $gg \to t \bar t, b \bar b, t \bar b W, t \bar t Z, b \bar b Z, t
\bar t H, b \bar b H$. Gauge boson virtual corrections are related to real
transverse gauge boson emission, and Higgs virtual corrections to Higgs and
longitudinal gauge boson emission. At the LHC, electroweak corrections become
important in the TeV regime. At the proposed 100 TeV collider, electroweak
interactions enter a new regime, where the corrections are very large and need
to be resummed.
