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arXiv · 1007.5517

Search for Acoustic Signals from Ultra-High Energy Neutrinos in 1500 km^3 of Sea Water

Naoko Kurahashi·Justin Vandenbroucke·Giorgio Gratta
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Abstract

An underwater acoustic sensor array spanning ~1500 km^3 is used to search for cosmic-ray neutrinos of ultra-high energies (UHE, E > 10^18 eV). Approximately 328 million triggers accumulated over an integrated 130 days of data taking are analysed. The sensitivity of the experiment is determined from a Monte Carlo simulation of the array using recorded noise conditions and expected waveforms. Two events are found to have properties compatible with showers in the energy range 10^24 to 5x10^24 eV and 10^22 to 5x10^22 eV. Since the understanding of impulsive backgrounds is limited, a flux upper limit is set providing the most sensitive limit on UHE neutrinos using the acoustic technique.

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Naoko Kurahashi, Justin Vandenbroucke, Giorgio Gratta. 2010-07-30. Search for Acoustic Signals from Ultra-High Energy Neutrinos in 1500 km^3 of Sea Water. https://doi.org/10.1103/physrevd.82.073006

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