Ultimate light-shining-through-a-wall experiments to establish QCD axions as the dominant form of dark matter
Establishing the axion as the dark matter (DM) particle after a haloscope discovery typically requires follow-up experiments to break the degeneracy between the axion’s coupling to photons and its local DM abundance. Given that a discovery would justify more significant investments, we explore the p...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
8 January 2025
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| In: |
Physical review
Year: 2025, Volume: 111, Issue: 1, Pages: 015003-1-015003-24 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.111.015003 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.111.015003 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.111.015003 
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| Author Notes: | Sebastian Hoof, Joerg Jaeckel, and Giuseppe Lucente |
| Summary: | Establishing the axion as the dark matter (DM) particle after a haloscope discovery typically requires follow-up experiments to break the degeneracy between the axion’s coupling to photons and its local DM abundance. Given that a discovery would justify more significant investments, we explore the prospects of ambitious light-shining-through-a-wall (LSW) setups to probe the QCD axion band. Leveraging the excellent mass determination in haloscopes, we show how to design LSW experiments with lengths on the order of 100 km and suitably aligned magnetic fields with apertures of around 1 m to reach well-motivated axion models across up to four orders of magnitude in mass. Beyond presenting a concrete plan for postdiscovery experimental efforts, we briefly discuss complementary experiments and future directions beyond LSW experiments. |
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| Item Description: | Gesehen am 27.08.2025 |
| Physical Description: | Online Resource |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.111.015003 |