The QCD Axion Window and Low Scale Inflation

Abstract

We show that the upper bound of the classical QCD axion window can be significantly relaxed for low-scale inflation. If the Gibbons-Hawking temperature during inflation is lower than the QCD scale, the initial QCD axion misalignment angle follows the Bunch-Davies distribution. The distribution is peaked at the strong CP conserving minimum if there is no other light degree of freedom contributing to the strong CP phase. As a result, the axion overproduction problem is significantly relaxed even for an axion decay constant larger than $10^{12}$GeV. We also provide concrete hilltop inflation models where the Hubble parameter during inflation is comparable to or much smaller than the QCD scale, with successful reheating taking place via perturbative decays or dissipation processes.

14 pages, 3 figures; v3:a version to appear in PRD

References in corpus (8)

• Discovering the QCD Axion with Black Holes and Gravitational Waves
• Constraining the mass of dark photons and axion-like particles through black-hole superradiance
• The Stochastic Axion Scenario
• Black Hole Spin Constraints on the Mass Spectrum and Number of Axion-like Fields
• Resonant conversions of QCD axions into hidden axions and suppressed isocurvature perturbations
• A Model of Anthropic Reasoning, Addressing the Dark to Ordinary Matter Coincidence
• PeV-scale Supersymmetry from New Inflation
• Non-thermal Leptogenesis after Majoron Hilltop Inflation

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