Dark matter search in dwarf irregular galaxies with ten years of data from the IceCube neutrino observatory
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arXiv
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| Format: | Preprint |
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2024
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| author | Lü, Yi-Fei Zhu, Ben-Yang Li, Rong-Lan Guo, Xue-Kang Liu, Tian-Ci Huang, Yong-Bo Liang, Yun-Feng |
| author_facet | Lü, Yi-Fei Zhu, Ben-Yang Li, Rong-Lan Guo, Xue-Kang Liu, Tian-Ci Huang, Yong-Bo Liang, Yun-Feng |
| contents | Dwarf irregular galaxies (dIrrs), as rotationally-supported systems, have more reliable J-factor measurements than dwarf spheroidal galaxies and have received attention as targets for dark matter detection in recent years. In this paper, we use 10 years of IceCube muon-track data and an unbinned maximum-likelihood-ratio method to search for neutrino signals beyond the background from the directions of 7 dIrrs, aiming to detect neutrinos produced by heavy annihilation dark matter. We do not detect any significant signal. Based on such null results, we calculate the upper limits on the velocity-averaged annihilation cross section for 1 TeV - 10 PeV dark matter. Our limits, although weaker than the strictest constraints in the literature in this mass range, are also a good complement to the existing results considering the more reliable J-factor measurements of dIrrs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_06571 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Dark matter search in dwarf irregular galaxies with ten years of data from the IceCube neutrino observatory Lü, Yi-Fei Zhu, Ben-Yang Li, Rong-Lan Guo, Xue-Kang Liu, Tian-Ci Huang, Yong-Bo Liang, Yun-Feng High Energy Astrophysical Phenomena High Energy Physics - Phenomenology Dwarf irregular galaxies (dIrrs), as rotationally-supported systems, have more reliable J-factor measurements than dwarf spheroidal galaxies and have received attention as targets for dark matter detection in recent years. In this paper, we use 10 years of IceCube muon-track data and an unbinned maximum-likelihood-ratio method to search for neutrino signals beyond the background from the directions of 7 dIrrs, aiming to detect neutrinos produced by heavy annihilation dark matter. We do not detect any significant signal. Based on such null results, we calculate the upper limits on the velocity-averaged annihilation cross section for 1 TeV - 10 PeV dark matter. Our limits, although weaker than the strictest constraints in the literature in this mass range, are also a good complement to the existing results considering the more reliable J-factor measurements of dIrrs. |
| title | Dark matter search in dwarf irregular galaxies with ten years of data from the IceCube neutrino observatory |
| topic | High Energy Astrophysical Phenomena High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2401.06571 |