The Flavor of Cosmology

Abstract

We discuss the cosmology of models in which the standard model Yukawa couplings depend on scalar field(s), often referred to as flavons. We find that thermal corrections of the flavon potential tend to decrease the Yukawa couplings, providing an important input to model-building. Working in the specific framework of Froggatt-Nielsen models, we compute the abundance of flavons in the early universe generated both via freeze-in and from coherent oscillations induced by thermal corrections to their potential, and discuss constraints on flavon models from cosmology. We find that cosmology places important constraints on theories containing flavons even for regions of parameter space inaccessible to collider searches.

arXiv comment26 pages, 5 figures, 5 appendices

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Cited by in corpus (12)

• Revisiting Electroweak Phase Transition with Varying Yukawa Coupling Constants
• Moduli Oscillation Induced by Reheating
• Baryogenesis From Flavon Decays
• Dark matter production through a non-thermal flavon portal
• Probing flavor violation and baryogenesis via primordial gravitational waves
• Flavon Magneto-Baryogenesis
• Gravitational waves from cosmic strings in Froggatt-Nielsen flavour models
• Cosmological constraints on light flavons
• Novel Flavon Stabilization with Trimaximal Neutrino Mixing
• Coleman-Weinberg dynamics of ultralight scalar dark matter and GeV-scale right-handed neutrinos
• Cosmological Stasis from Field-Dependent Decay
• WIMP Meets ALP: Coherent Freeze-Out of Dark Matter