the right-handed coupling.](g1ffl.pdf "fig:")   ![\[fig:gffmpcoup\] Coupling of the First KK mode of the gluon to the light KK modes of the custodial partners of the right-handed up-type quark as a function of the bulk mass parameter $c$. The left panel shows the left-handed coupling whereas the right panel the right-handed coupling.](g1ffr.pdf "fig:")
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A Warped Higgsless Model
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A final variant of the warped theory has no Higgs, and breaks the electroweak symmetry by boundary conditions [@Csaki:2003dt]. The need for the KK modes of the weak vector bosons to unitarize $WW$ scattering implies that the scale of KK mode masses is at most several hundred GeV, whereas the need to be consistent with precision electroweak data and realize a large top mass requires [@Cacciapaglia:2006mz][^1] g\_[t]{} = 2.5 g\_S  ,   g\_[Q3]{} = 2 g\_S  ,   g\_[b]{} = -0.32 g\_S  ,\
g\_[[other RH]{}]{} = -0.33 g\_S  ,    g\_[[other LH]{}]{} = 0.15 g\_S . \[eq:hlfermion\] We see that the basic trend is very similar to the other RS models we consider. The main distinguishing feature is the fact that the mass of the KK gluon must be less in order for the Higgsless model to remain consistent with perturbative unitarity.

Production and 