A 5D holographic QCD axion model identifies bulk modes for the axion and eta prime, traces the quality problem to insufficient compositeness, and finds the physical axion mostly in the bulk gauge field when quality is high.
High-quality composite Pati-Salam axion,
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Warped extra-dimensional Wilson-line axions can achieve high quality when non-QCD potential contributions from charged bulk fields are parametrically suppressed by geometry and brane effects.
Review of confining dark sectors summarizing dark matter candidates, abundance mechanisms, discovery channels, and applications to the abundance similarity puzzle.
citing papers explorer
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The Holographic QCD Axion in Five Dimensions
A 5D holographic QCD axion model identifies bulk modes for the axion and eta prime, traces the quality problem to insufficient compositeness, and finds the physical axion mostly in the bulk gauge field when quality is high.
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Axion Quality in Warped Extra-Dimension
Warped extra-dimensional Wilson-line axions can achieve high quality when non-QCD potential contributions from charged bulk fields are parametrically suppressed by geometry and brane effects.
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Rich Phenomenology from Simple Ingredients: A Review of Confining Dark Sectors
Review of confining dark sectors summarizing dark matter candidates, abundance mechanisms, discovery channels, and applications to the abundance similarity puzzle.
- Specially Embedding a Composite Axion Model