Study of the high-energy neutrino diffuse flux with the ANTARES neutrino telescope
July 22, 2019
The analysis of the ANTARES all-flavour 9-year data sample provided the observation of a mild excess of events over the expected atmospheric backgrounds. This excess is consistent with the high-energy diffuse cosmic neutrino signal detected by the IceCube Neutrino Observatory, using different analysis strategies and data sample, though less significant because of the smaller detector size. Nevertheless, the analysis of ANTARES data can provide valuable information in the study of the high-energy neutrino signal.
The data sample of the previously published analysis has been expanded adding ∼900 additional days of detector data acquisition time. The results of the analysis of this additional set are reported in this contribution. A 1.8σ excess above the expectations from atmospheric backgrounds is observed in data. The null-cosmic contribution in the high-energy sample is excluded at 90% confidence level.
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