SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 87: Neutrinos III

T 87.4: Vortrag

Mittwoch, 22. März 2023, 18:15–18:30, POT/0051

Tau appearance with KM3NeT/ORCA — •Nicole Geißelbrecht for the ANTARES-KM3NET-ERLANGEN collaboration — Friedrich-Alexander-Universität Erlangen-Nürnberg, ECAP

KM3NeT/ORCA is a water Cherenkov detector currently under construction in the Mediterranean Sea. It is optimised for the detection of atmospheric neutrinos with the main goal of determining the neutrino mass ordering.
Even though atmospheric neutrinos are produced as electron or muon neutrinos and thus initially do not contain tau neutrinos, these are expected to appear at Earth due to neutrino oscillations. In KM3NeT/ORCA, tau neutrinos can’t be identified on an event-by-event basis but rather as a statistical excess of shower-like events. This measurement will allow KM3NeT/ORCA to measure the tau neutrino flux normalisation factor and provide insights into the unitarity of the PMNS matrix and hence the validity of the standard three-flavour neutrino oscillation model. This talk will cover the status of the tau appearance analysis with an early sub-array of KM3NeT/ORCA.