Strongly broken Peccei-Quinn symmetry in the early Universe

Abstract

We consider QCD axion models where the Peccei-Quinn symmetry is badly broken by a larger amount in the past than in the present, in order to avoid the axion isocurvature problem. Specifically we study supersymmetric axion models where the Peccei-Quinn symmetry is dynamically broken by either hidden gauge interactions or the $SU(3{)}_c$ strong interactions whose dynamical scales are temporarily enhanced by the dynamics of flat directions. The former scenario predicts a large amount of self-interacting dark radiation as the hidden gauge symmetry is weakly coupled in the present Universe. We also show that the observed amount of baryon asymmetry can be generated by the QCD axion dynamics via spontaneous baryogenesis. We briefly comment on the case in which the PQ symmetry is broken by a non-minimal coupling to gravity.

29 pages, 1 figure, v2: final revision with minor corrections, matches the version published in JCAP

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Cited by in corpus (28)

• Axion dark matter: strings and their cores
• Quality of the Peccei-Quinn symmetry in the Aligned QCD Axion and Cosmological Implications
• Lepto-Axiogenesis
• QCD Axion on Hilltop by a Phase Shift of $\pi$
• Axion Misalignment Driven to the Hilltop
• Axion Isocurvature and Magnetic Monopoles
• Primordial Black Holes from QCD Axion Bubbles
• Axion Misalignment Driven to the Bottom
• Cosmic implications of a low-scale solution to the axion domain wall problem
• Adiabatic suppression of the axion abundance and isocurvature due to coupling to hidden monopoles
• High-Scale Axions without Isocurvature from Inflationary Dynamics
• Cosmological effects of Peccei-Quinn symmetry breaking on QCD axion dark matter
• Trapping Effect for QCD Axion Dark Matter
• QCD Axion Window and False Vacuum Higgs Inflation
• High Energy Sphalerons for Baryogenesis at Low Temperatures
• Resurrecting Low-Mass Axion Dark Matter Via a Dynamical QCD Scale
• Resonant production of dark photons from axion without a large coupling
• Cosmological Perturbations of Axion with a Dynamical Decay Constant
• Revisiting Isocurvature Bounds on the Minimal QCD Axion
• Inflaxion Dark Matter
• Leptogenesis via the 750 GeV pseudoscalar
• Minimal solution to the axion isocurvature problem from a nonminimal coupling
• A Dynamical Solution to the Axion Domain Wall Problem
• Curvaton as dark matter with secondary inflation
• About the isocurvature tension between axion and high scale inflationary models
• Resolving the QCD Axion Domain Wall Problem with a Light Axion
• No Warm Inflation From a Vanilla Axion
• Gauge coupling jump and small instantons from a large non-minimal coupling