22 We also add self interactions of the extra scalar field ρ , described by the potential whereupon the field ρ acquires a VEV ˜ v = µ √$_{λ}$ and a mass m$_{h}$ = √ 2 b ( πR ) µ . We then expand as usual: in this way the Lagrangian is equal to that of eq. (8) plus kinetic, mass and interaction terms for h . The interactions between h and the gauge bosons help unitarizing the scattering of the longitudinally polarized vectors, and the unitarity violation is postponed to the scale typical of a 5D theory, Λ ′ . In the GD-BESS case, the presence of a physical scalar was undesirable since it seemed to reintroduce the hierarchy problem. In the continuum limit, however, at least for a particular choice of the extra-dimensional background, the slice of AdS$_{5}$ that we will analyze in section VI B, the h field can be interpreted as a composite Higgs state - just as the KK excitations of the gauge bosons - by the AdS/CFT correspondence [7, 63, 64, 70], sidestepping the hierarchy problem. In this last section, we are going to do a brief phenomenological study of the continuum GD-BESS in correspondence of two particular choices for the warp factor b ( y ): the flat limit , b ( y ) ≡ 1 and the RS limit , b ( y ) = e − 2 $^{ky}$. In both cases, we will report spectrum examples, bounds from electroweak precision tests and naive unitarity cut-off. In this case, we have b ( y ) ≡ 1. This immediately implies (using eq. (62)) To get an interesting phenomenology at an accessible scale, we need ¯ M ∼ TeV. The basic parameters of the model are πR , the gauge couplings g$_{5}$ , ˜ g and ˜ g ′ , the VEV of the scalar field ˜ v (which is ≡ v since b = 1) and its self-coupling constant λ . The latter is only used ¯ M = √$_{3}$ πR . (85) A. Flat extra dimension VI. PHENOMENOLOGY V ( ρ ) = − µ 2 2 ρ 2 + λ 4 ρ $^{4}$, (83) ρ = h + ˜ v ; (84)