low KK mode masses is to include large-ish kinetic terms for the gauge fields on the IR brane [@Davoudiasl:2002ua]. Such terms repell the KK mode wave functions from the brane, and have a large effect on the phenomenology of the KK modes [@Carena:2002me]. Brane terms are a class of higher dimensional operators of the 5d theory, - d\^5x { F\_[MN]{}\^[a]{}F\^[MN a]{}} 2 r\_[IR]{} ( z - z\_v ) \[eq:actionbk\] and will be induced by the orbifold boundary conditions and localized fields [@Georgi:2000ks]. Their magnitude $r_{IR}$ is a free parameter of the effective theory. While the size of the IR boundary kinetic term for the gluon is not closely connected to the quality of the electroweak fit, one would expect that if the UV physics is such that there are large IR kinetic terms for the electroweak bosons, such terms are probably also large for the gluon as well. Thus, if one could infer the presence of large gluon terms, it would at least suggest that a similar term is present in the electroweak sector, and responsible for the success of the SM in explaining the electroweak fit.

The IR boundary kinetic term does not affect the form of the bulk 