Inelastically Decoupling 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_ | 1866918116397678592 |
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| author | Frumkin, Ronny Hochberg, Yonit Kuflik, Eric Vilk, Binyamin |
| author_facet | Frumkin, Ronny Hochberg, Yonit Kuflik, Eric Vilk, Binyamin |
| contents | We present a new dark matter candidate, the `inELastically DEcoupling Relic' (iELDER), which is a cold thermal relic whose abundance is determined by the freeze out of its inelastic scattering off of bath particles in the presence of $3\to2$ self-annihilations. The dark matter is predicted to be light, in the $O(\mathrm{MeV}-\mathrm{GeV})$ range, with significant self-annihilations and very weak inelastic couplings to ordinary matter. We demonstrate iELDER dark matter using a $Z_3$-symmetric toy model as well as QCD-like pion theories-the latter showing promising prospects for detection and providing a new benchmark for future searches. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_04772 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Inelastically Decoupling Dark Matter Frumkin, Ronny Hochberg, Yonit Kuflik, Eric Vilk, Binyamin High Energy Physics - Phenomenology We present a new dark matter candidate, the `inELastically DEcoupling Relic' (iELDER), which is a cold thermal relic whose abundance is determined by the freeze out of its inelastic scattering off of bath particles in the presence of $3\to2$ self-annihilations. The dark matter is predicted to be light, in the $O(\mathrm{MeV}-\mathrm{GeV})$ range, with significant self-annihilations and very weak inelastic couplings to ordinary matter. We demonstrate iELDER dark matter using a $Z_3$-symmetric toy model as well as QCD-like pion theories-the latter showing promising prospects for detection and providing a new benchmark for future searches. |
| title | Inelastically Decoupling Dark Matter |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2508.04772 |