Coset Cosmology

Abstract

We show that the potential of Nambu-Goldstone bosons can have two or more local minima e.g. at antipodal positions in the vacuum manifold. This happens in many models of composite Higgs and of composite Dark Matter. Trigonometric potentials lead to unusual features, such as symmetry non-restoration at high temperature. In some models, such as the minimal $\mathrm{SO}(5)/SO(4)$ composite Higgs with fermions in the fundamental representation, the two minima are degenerate giving cosmological domain-wall problems. Otherwise, an unusual cosmology arises, that can lead to supermassive primordial black holes; to vacuum or thermal decays; to a high-temperature phase of broken $\mathrm{SU}(2{)}_L$, possibly interesting for baryogenesis.

30 pages, 6 figures; published version

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• Light custodians in natural composite Higgs models
• The Composite Nambu-Goldstone Higgs
• Beyond the Minimal Composite Higgs Model
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• The Other Natural Two Higgs Doublet Model
• The Formation of Primary Galactic Nuclei during Phase Transitions in the Early Universe
• Gravitational Waves from Warped Spacetime
• Time-Reversal Breaking in QCD${}_4$, Walls, and Dualities in 2+1 Dimensions
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• Solving the Hierarchy Problem Discretely
• A Confining Strong First-Order Electroweak Phase Transition
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• Gravitational Backreaction Effects on the Holographic Phase Transition
• Weakly Interacting Stable Pions
• The Baryon Asymmetry from a Composite Higgs
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• Dark Matter as a weakly coupled Dark Baryon
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Cited by in corpus (12)

• The landscape of QCD axion models
• The Science of the Einstein Telescope
• Gravitational Waves from Domain Walls in Pulsar Timing Array Datasets
• Composite Dynamics in the Early Universe
• High-Temperature Electroweak Symmetry Breaking by SM Twins
• Composite dark matter phenomenology in the presence of lighter degrees of freedom
• Composite Hybrid Inflation: Dilaton and Waterfall Pions
• Implications for Cosmic Domain Walls from LIGO-Virgo First Three Observing Runs
• Gegenbauer Goldstones
• Gegenbauer's Twin
• Axion-CMB Scenario in Supercooled Universe
• Asymmetric baryon capture by primordial black holes and baryon asymmetry of the universe