  Precision data generally require the threshold for physics beyond the
Standard Model to be at the deca-TeV (10 TeV) scale or higher. This raises the
question of whether there are interesting deca-TeV models for which the LHC may
find direct clues. A possible scenario for such physics is a 5D warped model of
fermion masses and mixing, with Kaluza-Klein masses m_KK ~ 10 TeV, allowing it
to avoid tension with stringent constraints, especially from flavor data.
Discovery of a Standard-Model-like Higgs boson, for which there are some hints
at ~125 GeV at the LHC, would also require the KK masses to be at or above 10
TeV. These warped models generically predict the appearance of a much lighter
radion scalar. We find that, in viable warped models of flavor, a radion with a
mass of a few hundred GeV and an inverse coupling of order m_KK ~ 10 TeV could
typically be accessible to the LHC experiments -- with sqrt(s) = 14 TeV and 100
fb^-1 of data. The above statements can be applied, mutatis mutandis, to 4D
dual models, where conformal dynamics and a dilaton replace warping and the
radion, respectively. Detection of such a light and narrow scalar could thus
herald the proximity of a new physical threshold and motivate experiments that
would directly probe the deca-TeV mass scale.
