Developing New Analysis Tools for Near Surface Radio-based Neutrino Detectors ...

• Main Authors: ARIANNA Collaboration, 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.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: arXiv 2023
• Subjects: High Energy Astrophysical Phenomena astro-ph.HE; Data Analysis, Statistics and Probability physics.data-an; FOS Physical sciences; Antarc*; Antarctic
• Online Access: https://dx.doi.org/10.48550/arxiv.2307.07188; https://arxiv.org/abs/2307.07188

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 more neutrino signal. We first describe two new physics-based neutrino selection methods, (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, 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 addition, the neutrino efficiency is ... : 29 pages, 16 figures, 3 tables ...