A Perturbative RS I Cosmological Phase Transition

Abstract

We identify a class of Randall-Sundrum type models with a successful first order cosmological phase transition during which a 5D dual of approximate conformal symmetry is spontaneously broken. Our focus is on soft-wall models that naturally realize a light radion/dilaton and suppressed dynamical contribution to the cosmological constant. We discuss phenomenology of the phase transition after developing a theoretical and numerical analysis of these models both at zero and finite temperature. We demonstrate a model with a TeV-Planck hierarchy and with a successful cosmological phase transition where the UV value of the curvature corresponds, via AdS/CFT, to an $N$ of $20$, where 5D gravity is expected to be firmly in the perturbative regime.

34pp, 12 figures

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• A more attractive scheme for radion stabilization and supercooled phase transition
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• The Supercooling Window at Weak and Strong Coupling
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• The Light Radion Window
• Self-Organized Higgs Criticality
• Conformal Leptogenesis in Composite Higgs Models
• Radion dynamics, heavy Kaluza-Klein resonances and gravitational waves
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• Quantum Corrections to Randall-Sundrum Model from JT Gravity
• Randall-Sundrum Model with a Dilaton Field at Finite Temperature