29 50 TeV 15 TeV 5 TeV 500 1000 1500 2000 0.8 1.0 1.2 1.4 1.6 1.8 2.0 M$_{1}$ GLYPH<LParen1> GeV GLYPH<RParen1> g$_{5}$ 50 TeV 15 TeV 5 TeV 500 1000 1500 2000 0.8 1.0 1.2 1.4 1.6 1.8 2.0 M$_{1}$ GLYPH<LParen1> GeV GLYPH<RParen1> g$_{5}$ FIG. 5: Allowed regions in the ( M$_{1}$, ¯ g$_{5}$ ) parameter space for the model in the RS limit ( b ( y ) = e − 2 $^{ky}$, with kπR fixed at 35 ), for two values of the Higgs mass: m$_{H}$ = 1 TeV (on the left) and m$_{H}$ = 300 GeV (on the right), based on electroweak precision constraints. Also shown are the constraints from naive dimensional analysis (contours correspond to different choices of the UV cut-off). in this case, the UV cut-off due to unitarity is generally much lower than it was in the flat case. Nevertheless, the model is again potentially compatible with EW precision data, even when the new heavy vector states have masses around one TeV and an Higgs mass sensibly greater than 100 − 200 GeV. The unitarity cut-off scale, which is quite low, calls for an UV extension of the model at an energy scale which is not much higher than the potential reach of the LHC; still the scenario described by the model seems interesting and deserves an accurate study. The physical content of the 5D D-BESS on an AdS background is very similar to the one of the RS1-like model described in [20]. In that reference, the authors studied a SU (2)$_{L}$ ⊗ U (1)$_{Y}$ 5D gauge theory in AdS background, with localized kinetic terms on the IR brane. The main difference between this set-up and the one we have outlined in this work is that we have considered a larger SU (2)$_{L}$ ⊗ SU (2)$_{R}$ bulk gauge symmetry. Notice, however, that if we add fermions in the simplest way, that is by localizing them on the IR brane (similarly to what was done in refs. [39, 60]), then the extra gauge fields (that correspond to what we called the “right charged sector”) are almost impossible to detect experimentally, since they cannot interact with the fermions (by eq. (25) they have no superposition with the IR