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

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

2010-07-30

arxiv.org/abs/1007.5517v1

Phys. Rev. D 82, 073006 (2010)

Physics

High Energy Physics

High Energy Physics - Experiment

Submitted to PRD. 8 pages, 12 figures

Scientific paper

10.1103/PhysRevD.82.073006

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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