Conformal model for gravitational waves and dark matter: A status update

Abstract

We present an updated analysis of the first-order phase transition associated with symmetry breaking in the early Universe in a classically scale-invariant model extended with a new SU(2) gauge group. Including recent developments in understanding supercooled phase transitions, we compute all of its characteristics and significantly constrain the parameter space. We then predict gravitational wave spectra generated during this phase transition and by computing the signal-to-noise ratio we conclude that this model is well testable (and falsifiable) with LISA. We also provide predictions for the relic dark matter abundance. It is consistent with observations in a rather narrow part of the parameter space, since we exclude the so-called supercool dark matter scenario based on an improved description of percolation and reheating after the phase transition as well as inclusion of the running of couplings. Finally, we devote attention to renormalisation-scale dependence of the results. Even though our main results are obtained with the use of renormalisation-group improved effective potential, we also perform a fixed-scale analysis which proves that the dependence on the scale is not only qualitative but also quantitative.

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Cited by in corpus (42)

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• Supercool subtleties of cosmological phase transitions
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• Gravitational waves from supercooled phase transitions: dimensional transmutation meets dimensional reduction
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• Model-Independent Radiative Symmetry Breaking and Gravitational Waves
• Bounds on the bubble wall velocity
• Stop comparing resummation methods
• Hunting WIMPs with LISA: Correlating dark matter and gravitational wave signals
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• The hydrodynamics of inverse phase transitions
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• Vector dark matter in supercooled Higgs portal models
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• Testing Unification and Dark Matter with Gravitational Waves
• Sub-GeV dark matter and nano-Hertz gravitational waves from a classically conformal dark sector
• Gravitational waves and tadpole resummation: Efficient and easy convergence of finite temperature QFT
• From Hubble to Bubble
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• Bubble Trouble: a Review on Electroweak Baryogenesis
• Left-Right Symmetry Breaking and Gravitational Waves : A Tale of Two Phase Transitions
• Gravitational Wave Signatures of Gauged Baryon and Lepton Number
• Supercooled phase transitions in conformal dark sectors explain NANOGrav data
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• Reconstructing early universe evolution with gravitational waves from supercooled phase transitions
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• Gravitational waves from a curvature-induced phase transition of a Higgs-portal dark matter sector
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• Radiative symmetry breaking from the on-shell perspective
• Probing the Neutrino Seesaw Scale with Gravitational Waves
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• Leptogenesis with perturbations in type-II and type-III seesaw models