A Non-Inflationary Axion and ALP Misalignment Mechanism
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866915367895433216 |
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| author | Brandenberger, Robert |
| author_facet | Brandenberger, Robert |
| contents | Based on considerations of quantum gravity, global symmetries which lead to axions as pseudo Nambu-Goldstone bosons after low scale symmetry breaking cannot be exact at the Planck scale. Here, we show that Planck-suppressed terms which yield this symmetry breaking may provide a non-inflationary misalignment mechanism which can generate coherent oscillations of the axion and axion-like particle (ALP) fields at low temperatures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_00785 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A Non-Inflationary Axion and ALP Misalignment Mechanism Brandenberger, Robert High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Theory Based on considerations of quantum gravity, global symmetries which lead to axions as pseudo Nambu-Goldstone bosons after low scale symmetry breaking cannot be exact at the Planck scale. Here, we show that Planck-suppressed terms which yield this symmetry breaking may provide a non-inflationary misalignment mechanism which can generate coherent oscillations of the axion and axion-like particle (ALP) fields at low temperatures. |
| title | A Non-Inflationary Axion and ALP Misalignment Mechanism |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2507.00785 |