EUSO-SPB2 Cherenkov Telescope: Overview and First Neutrino Constraints
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866908652767543296 |
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| author | Heibges, Tobias Garg, Diksha Guépin, Claire Burton-Heibges, Julia Krizmanic, John F. Reno, Mary Hall Venters, Tonia M. Wiencke, Lawrence |
| author_facet | Heibges, Tobias Garg, Diksha Guépin, Claire Burton-Heibges, Julia Krizmanic, John F. Reno, Mary Hall Venters, Tonia M. Wiencke, Lawrence |
| contents | Earth-skimming tau neutrinos with energies above $\sim 10$ PeV can convert to tau leptons that decay in the atmosphere and initiate upward-going extensive air showers that generate optical Cherenkov signals. On a curtailed NASA balloon flight in May 2023, the Cherenkov telescope (CT) on the Extreme Universe Space Observatory on a Super Pressure Balloon 2 (EUSO-SPB2) was launched and had a short flight at $\sim 30$ km altitude. With some time pointing below the Earth's limb, EUSO-SPB2 CT data allow searches for neutrino events that yield optical flashes from the forward-beamed Cherenkov light. We present an overview of the CT and provide upper limits for the diffuse astrophysical neutrino flux from flight data as a proof-of-principle demonstration. We also briefly describe how the methodology is extended to potential transient neutrino point sources. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_10944 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | EUSO-SPB2 Cherenkov Telescope: Overview and First Neutrino Constraints Heibges, Tobias Garg, Diksha Guépin, Claire Burton-Heibges, Julia Krizmanic, John F. Reno, Mary Hall Venters, Tonia M. Wiencke, Lawrence High Energy Astrophysical Phenomena Earth-skimming tau neutrinos with energies above $\sim 10$ PeV can convert to tau leptons that decay in the atmosphere and initiate upward-going extensive air showers that generate optical Cherenkov signals. On a curtailed NASA balloon flight in May 2023, the Cherenkov telescope (CT) on the Extreme Universe Space Observatory on a Super Pressure Balloon 2 (EUSO-SPB2) was launched and had a short flight at $\sim 30$ km altitude. With some time pointing below the Earth's limb, EUSO-SPB2 CT data allow searches for neutrino events that yield optical flashes from the forward-beamed Cherenkov light. We present an overview of the CT and provide upper limits for the diffuse astrophysical neutrino flux from flight data as a proof-of-principle demonstration. We also briefly describe how the methodology is extended to potential transient neutrino point sources. |
| title | EUSO-SPB2 Cherenkov Telescope: Overview and First Neutrino Constraints |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2511.10944 |