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

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.

Submitted to PRD. 8 pages, 12 figures

References in corpus (2)

• Observational Constraints on the Ultra-high Energy Cosmic Neutrino Flux from the Second Flight of the ANITA Experiment
• Erratum: Observational Constraints on the Ultra-high Energy Cosmic Neutrino Flux from the Second Flight of the ANITA Experiment

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• Acoustic detection of ultra-high energetic neutrinos - a snap shot
• Neutrino Detection, Position Calibration and Marine Science with Acoustic Arrays in the Deep Sea
• Listening for ultra-heavy dark matter with underwater acoustic detectors