Geomagnetic constraints on Millicharged Dark Matter
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866917195312791552 |
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| author | Arza, Ariel Gong, Yuanlin Shu, Jing Wu, Lei Yuan, Qiang Zhu, Bin |
| author_facet | Arza, Ariel Gong, Yuanlin Shu, Jing Wu, Lei Yuan, Qiang Zhu, Bin |
| contents | Millicharged particles are well-motivated dark matter candidates arising in many extensions of the Standard Model. We show that, despite their tiny coupling $e_m$ to photons, millicharged dark matter (mDM) in the Earth's geomagnetic field can generate a quasi-static, monochromatic magnetic signal with angular frequency twice the mDM mass. Using null results from the SuperMAG and SNIPE Hunt collaborations, we constrain the effective charge of bosonic mDM in the mass range $10^{-18}$--$10^{-14}\,\text{eV}$. The resulting upper bounds exceed stellar cooling constraints by over thirteen orders of magnitude, demonstrating the power of this method. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_14949 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Geomagnetic constraints on Millicharged Dark Matter Arza, Ariel Gong, Yuanlin Shu, Jing Wu, Lei Yuan, Qiang Zhu, Bin High Energy Physics - Phenomenology Millicharged particles are well-motivated dark matter candidates arising in many extensions of the Standard Model. We show that, despite their tiny coupling $e_m$ to photons, millicharged dark matter (mDM) in the Earth's geomagnetic field can generate a quasi-static, monochromatic magnetic signal with angular frequency twice the mDM mass. Using null results from the SuperMAG and SNIPE Hunt collaborations, we constrain the effective charge of bosonic mDM in the mass range $10^{-18}$--$10^{-14}\,\text{eV}$. The resulting upper bounds exceed stellar cooling constraints by over thirteen orders of magnitude, demonstrating the power of this method. |
| title | Geomagnetic constraints on Millicharged Dark Matter |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2501.14949 |