Warped Electroweak Breaking Without Custodial Symmetry

Abstract

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.

15 pages, 3 figures

References in corpus (29)

• A Large Mass Hierarchy from a Small Extra Dimension
• Modulus Stabilization with Bulk Fields
• Linear Confinement and AdS/QCD
• Modeling the fifth dimension with scalars and gravity
• A custodial symmetry for Zbb
• Gravity Duals of Supersymmetric SU(N) x SU(N+M) Gauge Theories
• RS1, Custodial Isospin and Precision Tests
• Phenomenology of a Stabilized Modulus
• Conformal Technicolor
• Opaque Branes in Warped Backgrounds
• Higgs Mechanism and Bulk Gauge Boson Masses in the Randall-Sundrum Model
• Brane-localized Kinetic Terms in the Randall-Sundrum Model
• Electroweak Breaking on a Soft Wall
• Dynamical Soft-Wall AdS/QCD
• Warped 5-Dimensional Models: Phenomenological Status and Experimental Prospects
• Soft-Wall Stabilization
• The Soft-Wall Standard Model
• The Throat as a Randall-Sundrum Model with Goldberger-Wise Stabilization
• Warped Deformed Throats have Faster (Electroweak) Phase Transitions
• Holographic Unhiggs
• Electroweak observables in a general 5D background
• Bulk Fermions in Warped Models with a Soft Wall
• Fermion Mass Hierarchy from the Soft Wall
• Suppressing Lepton Flavour Violation in a Soft-Wall Extra Dimension
• Fermion Flavor in Soft-Wall AdS
• From Soft Walls to Infrared Branes
• Holographic Renormalisation and the Electroweak Precision Parameters
• On the stability of a soft-wall model
• Electroweak Constraints on Warped Geometry in Five Dimensions and Beyond

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