A Proof of the Axion?

2018/11/07 by Dvali, Gia, Gomez, Cesar, Zell, Sebastian · 5 citations
#Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th)

paper · doi:10.48550/arxiv.1811.03079

Abstract

We show that the de Sitter quantum breaking bound when applied to QCD exposes the necessity of the axion solution to the strong CP problem. The Peccei-Quinn mechanism emerges as a consistency requirement independent of the naturalness questions. The θ-angle must be unphysical rather than simply small. All other approaches including a fine-tuning of θ lead to the existence of de Sitter vacua and are excluded by consistency.

Cited by

• A non-compact QCD axion
• On Non-Minimal Couplings to Gravity and Axion Isocurvature Bounds
• The Strong-CP Problem and its Gauge Axion solution as Evidence for Fundamental Strings
• η_{\rm w}-meson from topological properties of the electroweak vacuum
• Hiding in Plain Sight, the electroweak η_W

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