Decay {#sec:xsec}
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The details of production of KK gluons at the LHC will depend on how they couple to the relevant partons at LHC energies, and these differences will give us a powerful way to discriminate between models. Note that the vertex with two gluons and a KK gluon is zero at tree-level, meaning that the dominant production mode is $q\bar q$ annihilation. As is well-known, in the standard RS framework the KK gluon coupling to all fermions aside from $t_R$ is suppressed. As we saw above, models with brane kinetic terms can increase couplings to UV-localized fields, which increases the rate and affect the branching ratios. In addition, the models with custodial symmetry have a large coupling to $Q_3$, turning on a new production mode from bottom fusion, but have a smaller branching ratio because the decay into the custodial partner KK modes may compete with top. In Figure \[fig:xsec\], we plot the cross section, calculated at leading order by MADGRAPH [@Alwall:2007st], $pp \rightarrow g^1$ for $\sqrt{S} = 14$ TeV, as a function of $g^1$ mass for the models considered above, including the channels initiated by light quark fusion and bottom fusion.

![\[fig:xsec\] Cross section for $pp \rightarrow 