Bulk gauge and matter fields in nested warping: II. Symmetry breaking and phenomenological consequences

Abstract

Generalizing the Randall-Sundrum scenario to higher dimensions with nested warpings has been shown to avoid the constraints besetting the former. In the first paper of this series [JHEP 09 (2015) 202], the Standard Model gauge and fermion fields were extended into such a six-dimensional bulk and the construction was shown to have several interesting and welcome features. In this paper, we discuss the electroweak symmetry breaking, presenting a novel Higgs localization mechanism that leads to interesting phenomenology in the Higgs sector. Localizing the Higgs modifies the Z µ and W µ boson wavefunctions, which leads to tree level changes in the oblique parameters. Using these as well as the correction to low-energy four-Fermi operators, we derive the constraints on our model and also discuss the gauge coupling evolution therein. Amusingly, the model can naturally incorporate a Higgs resonance in the 700-800 GeV range.

U(1) gauge vector field on a codimension-2 brane

“…In the brane world theory, the zero modes can be regarded as particles living in four-dimensional space-time, while the massive KK modes might reveal the mysteries of extra dimensions. Thus, there has been many papers focus on these KK modes [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33].…”

Universal extra dimensions and the graviton portal to dark matter

“…This is markedly different from the case of the original RS model and has considerable phenomenological consequences [27,32]. Expanding the graviton wavefunction as…”

“…the difference between the left (l) and right (r) fermion modes 7 accruing from the different boundary conditions [32]. Using eqns.…”

Precision tools and models to narrow in on the 750 GeV diphoton resonance

“…This possibility would be favoured by a large width of the resonance, as first indications seem to suggest. Another possibility is to interpret the signal in the context of extra-dimensional models [5,9,29,30,48,84,125,141,203,225,312], with the resonance being a scalar, a graviton, a dilaton, or a radion, depending on the scenario. However, some of these interpretations are in tension with the non-observation of this resonance in other channels.…”