Direct Detection of Ultralight Dark Matter via Charged Lepton Flavor Violation
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| Format: | Preprint |
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2025
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| author | Bigaran, Innes Fox, Patrick J. Gouttenoire, Yann Harnik, Roni Krnjaic, Gordan Menzo, Tony Zupan, Jure |
| author_facet | Bigaran, Innes Fox, Patrick J. Gouttenoire, Yann Harnik, Roni Krnjaic, Gordan Menzo, Tony Zupan, Jure |
| contents | We propose a dark matter direct-detection strategy using charged particle decays at accelerator-based experiments. If ultralight $(m_ϕ\ll \text{eV})$ dark matter has a misalignment abundance, its local field oscillates in time at a frequency set by its mass. If it also couples to flavor-changing neutral currents, rare exotic decays such as $μ\to e ϕ'$ and $τ\to e(μ)ϕ'$ inherit this modulation. Focusing on such charged lepton flavor-violating decays, we show that sufficient event samples can enable detection of ultralight dark matter candidates at Mu3e, Belle-II, and FCC-ee. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_07722 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Direct Detection of Ultralight Dark Matter via Charged Lepton Flavor Violation Bigaran, Innes Fox, Patrick J. Gouttenoire, Yann Harnik, Roni Krnjaic, Gordan Menzo, Tony Zupan, Jure High Energy Physics - Phenomenology High Energy Physics - Experiment We propose a dark matter direct-detection strategy using charged particle decays at accelerator-based experiments. If ultralight $(m_ϕ\ll \text{eV})$ dark matter has a misalignment abundance, its local field oscillates in time at a frequency set by its mass. If it also couples to flavor-changing neutral currents, rare exotic decays such as $μ\to e ϕ'$ and $τ\to e(μ)ϕ'$ inherit this modulation. Focusing on such charged lepton flavor-violating decays, we show that sufficient event samples can enable detection of ultralight dark matter candidates at Mu3e, Belle-II, and FCC-ee. |
| title | Direct Detection of Ultralight Dark Matter via Charged Lepton Flavor Violation |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2503.07722 |