Developing new analysis tools for near surface radio-based neutrino detectors ...

• Main Authors: Anker, A., Baldi, P., Barwick, S. W., Beise, J., Besson, D. Z., Chen, P., Gaswint, G., Glaser, C., Hallgren, A., Hanson, J. C., Klein, S. R., Kleinfelder, S. A., Lahmann, R., Liu, J., Nam, J., Nelles, A., Paul, M. P., Persichilli, C., Plaisier, I., Rice-Smith, R., Tatar, J., Terveer, K., Wang, S. -H, Zhao, L., Arianna Collaboration
• Format: Text
• Language: English
• Published: Deutsches Elektronen-Synchrotron, DESY, Hamburg 2023
• Subjects: 530; neutrino detector; neutrino UHE; efficiency; background; ARIANNA; surface; 5/3; cosmic radiation; flux; dipole; cascade; trigger; numerical calculations; ice; Machine learning; neutrino astronomy; neutrino detectors; ultra high energy photons and neutrinos; Antarctic; The Antarctic; Antarc*
• Online Access: https://dx.doi.org/10.3204/pubdb-2024-00178; https://bib-pubdb1.desy.de/record/601424

38th International Cosmic Ray Conference, ICRC2023, Nagoya, Japan, 26 Jul 2023 - 3 Aug 2023; Journal of cosmology and astroparticle physics 10, 060 (2023). doi:10.1088/1475-7516/2023/10/060 ... : The ARIANNA experiment is an Askaryan radio detector designed to measure high-energy neutrino induced cascades within the Antarctic ice. Ultra-high-energy neutrinos above 10$^{16}$ eV have an extremely low flux, so experimental data captured at trigger level need to be classified correctly to retain as much neutrino signal as possible. We first describe two new physics-based neutrino selection methods, or “cuts”, (the updown and dipole cut) that extend the previously published analysis to a specialized ARIANNA station with 8 antenna channels, which is double the number used in the prior analysis. For a standard trigger with a threshold signal to noise ratio at 4.4, the new cuts produce a neutrino efficiency of > 95% per station-year of operation, while rejecting 99.93% of the background (corresponding to 53 remaining experimental background events). When the new cuts are combined with a previously developed cut using neutrino waveform templates, all background is removed at no change of efficiency. In ...