Aspects of Sommerfeld Enhancement in the light of Halo gamma-ray excess
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866912797690953728 |
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| author | Jho, Yongsoo Park, Jeonghwan Park, Min Gi Park, Seong Chan |
| author_facet | Jho, Yongsoo Park, Jeonghwan Park, Min Gi Park, Seong Chan |
| contents | We examine Sommerfeld enhancement in dark matter annihilation as a potential origin of the halo-like gamma-ray excess near $E_γ\simeq 20$ GeV reported by Totani. A minimal model with a light CP-even scalar mediator naturally produces a velocity-dependent annihilation cross section consistent with thermal freeze-out, the Milky Way excess, and limits from dwarf spheroidal galaxies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_24662 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Aspects of Sommerfeld Enhancement in the light of Halo gamma-ray excess Jho, Yongsoo Park, Jeonghwan Park, Min Gi Park, Seong Chan High Energy Physics - Phenomenology High Energy Astrophysical Phenomena We examine Sommerfeld enhancement in dark matter annihilation as a potential origin of the halo-like gamma-ray excess near $E_γ\simeq 20$ GeV reported by Totani. A minimal model with a light CP-even scalar mediator naturally produces a velocity-dependent annihilation cross section consistent with thermal freeze-out, the Milky Way excess, and limits from dwarf spheroidal galaxies. |
| title | Aspects of Sommerfeld Enhancement in the light of Halo gamma-ray excess |
| topic | High Energy Physics - Phenomenology High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2512.24662 |