Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 29: Neutrino physics 3

T 29.2: Talk

Tuesday, March 5, 2024, 16:15–16:30, Geb. 20.30: 2.058

Feasibility study of tau appearance measurement with the ANTARES neutrino telescope. — •Michail Chadolias for the ANTARES-KM3NET-ERLANGEN collaboration — Erlangen Centre for Astroparticle Physics (ECAP), Friedrich-Alexander-Universität Erlangen-Nürnberg

The ANTARES detector, a water Cherenkov neutrino telescope located in the Mediterranean Sea at a depth of 2.5 kilometres, operated successfully until its decommissioning in 2022. Primarily designed for detecting high-energy neutrinos of astrophysical origin, it was also sensitive to all neutrino flavours in the atmospheric neutrino flux with an energy threshold of a few GeV. This work focuses on tau neutrino appearance, i.e. the existence of a tau neutrino atmospheric flux component due to neutrino flavour oscillations at this energy range. Exploiting the data of the full 15-year detector lifetime, we report on an exploratory analysis investigating the feasibility to detect and characterise a flux of tau neutrinos with the ANTARES detector. Strategies for the challenging event selection and the current status of the sensitivity to the tau neutrino flux normalisation will be shown.

Keywords: Neutrino oscillations; Tau appearance; Neutrino telescope; ANTARES