Seafloor Topography Enhances KM3NeT Sensitivity to ANITA-like Events
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| Format: | Preprint |
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2025
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| _version_ | 1866917041808605184 |
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| author | Argüelles, Carlos A. Bertólez-Martínez, Toni Burgos-Mondéjar, Alba Burns, Anne-Katherine Lopez-Pavon, Jacobo Salvado, Jordi |
| author_facet | Argüelles, Carlos A. Bertólez-Martínez, Toni Burgos-Mondéjar, Alba Burns, Anne-Katherine Lopez-Pavon, Jacobo Salvado, Jordi |
| contents | In this article, we introduce the concept of \textit{topographic enhancement} in the context of ultra-high-energy neutrino detection by underwater neutrino telescopes. We demonstrate that the local topography around KM3NeT/ARCA can increase the detection efficiency in scenarios involving long-lived particles by up to a factor of $\sim 3$ due to the presence of an underwater mountain range in the direction of Malta. We consider a simplified model-independent approach that parametrizes the new physics able to generate both track-like and cascade-like signals in neutrino telescopes. When explaining the KM3-230213A event with a diffuse dark flux hypothesis, including its azimuthal direction--in addition to the zenith angle--provides additional constraints on the parameter space. In this effective model, the observations by KM3NeT and ANITA-IV can be simultaneously explained and the global tension with the lack of a corresponding detection in IceCube is reduced to 2.4 sigma. This work underscores the importance of incorporating topographic effects in the design and optimization of next-generation neutrino telescopes, as is done in the context of mountain-based detectors such as TAMBO. We present a numerical code which can be used to easily extend this topographical analysis to other experiments. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2510_21929 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Seafloor Topography Enhances KM3NeT Sensitivity to ANITA-like Events Argüelles, Carlos A. Bertólez-Martínez, Toni Burgos-Mondéjar, Alba Burns, Anne-Katherine Lopez-Pavon, Jacobo Salvado, Jordi High Energy Physics - Phenomenology High Energy Astrophysical Phenomena High Energy Physics - Experiment In this article, we introduce the concept of \textit{topographic enhancement} in the context of ultra-high-energy neutrino detection by underwater neutrino telescopes. We demonstrate that the local topography around KM3NeT/ARCA can increase the detection efficiency in scenarios involving long-lived particles by up to a factor of $\sim 3$ due to the presence of an underwater mountain range in the direction of Malta. We consider a simplified model-independent approach that parametrizes the new physics able to generate both track-like and cascade-like signals in neutrino telescopes. When explaining the KM3-230213A event with a diffuse dark flux hypothesis, including its azimuthal direction--in addition to the zenith angle--provides additional constraints on the parameter space. In this effective model, the observations by KM3NeT and ANITA-IV can be simultaneously explained and the global tension with the lack of a corresponding detection in IceCube is reduced to 2.4 sigma. This work underscores the importance of incorporating topographic effects in the design and optimization of next-generation neutrino telescopes, as is done in the context of mountain-based detectors such as TAMBO. We present a numerical code which can be used to easily extend this topographical analysis to other experiments. |
| title | Seafloor Topography Enhances KM3NeT Sensitivity to ANITA-like Events |
| topic | High Energy Physics - Phenomenology High Energy Astrophysical Phenomena High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2510.21929 |