  We derive the Lagrangian and Feynman rules up to bilinear scalar fields for
the mixed Higgs-radion eigenstates interacting with Standard Model particles
confined to a 3-brane in Randall-Sundrum warped geometry. We use the results to
compute precision electroweak observables and compare theory predictions with
experiment. We characterize the interesting regions of parameter space that
simultaneously enable a very heavy Higgs mass and a very heavy radion mass,
both masses being well above the putative Higgs boson mass limit in the
Standard Model derived from the constraints of precision electroweak
observables. For parameters consistent with the precision constraints the Higgs
boson physical eigenstate is typically detectable, but its properties may be
difficult to study at the Large Hadron Collider. In contrast, masses and
couplings are allowed for the physical radion eigenstate that make it
unobservable at the LHC. A Linear Collider will significantly improve our
ability to study the Higgs eigenstate, and will typically allow detection of
the radion eigenstate if it is within the machine's kinematical reach.
