  Radion couplings are almost identical to Higgs boson couplings, making it
very difficult to distinguish the two states when the radion mass and vacuum
expectation value are similar to those of the Higgs boson. The only real
difference lies in the fact that the coupling of radions to off-shell fermions
is proportional to the momentum rather than the mass of the fermion. This extra
contribution gets cancelled in all tree-level processes and shows up only in
loop-induced processes like Phi -> gamma gamma and Phi -> gg. We perform a
careful calculation of the branching ratios and establish that they can prove
crucial in clearly distinguishing a radion from a Higgs boson. This claim is
made concrete by evaluating the exclusive cross-sections in a radiative process
involving elementary scalars.
