2010/11/30 by Joan A. Cabrer, Gero von Gersdorff, M. Quirós +1 · 3 citations
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Electroweak interaction #Gauge boson #Gauge theory #Geometry #Hierarchy problem #Higgs boson #Higgs field #Higgs mechanism #Mathematical physics #Mathematics #Observable #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum mechanics #Scalar (mathematics) #Scalar field #Spontaneous symmetry breaking #Symmetry breaking #Technicolor #Theoretical physics #hep-ph #hep-th
paper · pdf · doi:10.1016/j.physletb.2011.01.058
published as Phys.Lett.B697:208-214,2011 · 15 pages, 3 figures
openalex publication_date 2011/02/02 · arxiv created 2011/03/09 · arxiv updated 2011/03/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We propose an alternative to the introduction of an extra gauge (custodial) symmetry to suppress the contribution of KK modes to the T parameter in warped theories of electroweak breaking. The mechanism is based on a general class of warped 5D metrics and a Higgs propagating in the bulk. The metrics are nearly AdS in the UV region but depart from AdS in the IR region, towards where KK fluctuations are mainly localized, and have a singularity outside the slice between the UV and IR branes. This gravitational background is generated by a bulk stabilizing scalar field which triggers a natural solution to the hierarchy problem. Depending on the model parameters, gauge-boson KK modes can be consistent with present bounds on EWPT for m > 1 TeV at 95% CL. The model contains a light Higgs mode which unitarizes the four-dimensional theory. The reduction in the precision observables can be traced back to a large wave function renormalization for this mode.