Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 55: Neutrinophysik III

T 55.1: Group Report

Wednesday, March 27, 2019, 16:00–16:20, H05

KM3NeT/ORCA: status and perspectives — •Jannik Hofestädt for the KM3NeT-ECAP collaboration — Friedrich-Alexander-Universität Erlangen-Nürnberg, ECAP

ORCA is the low-energy part of KM3NeT, the next-generation underwater Cherenkov neutrino detector currently under construction in the Mediterranean Sea. The ORCA detector features a dense configuration of optical modules, optimised for measuring the oscillation of atmospheric neutrinos with energies down to a few GeV. ORCA's primary goal is to resolve the neutrino mass hierarchy. With the same data, ORCA is also sensitive to the appearance of tau neutrinos and a variety of possible new physics phenomena.

In this talk, the status of the ORCA detector construction and the performance of the first detector elements in the deep sea will be reported. Different activities of the ORCA group at ECAP will be presented. An overview is given on the deep-learning-based event classification and regression developments for the analysis of ORCA data. Furthermore, the sensitivity of ORCA to possible quantum decoherence effects will be discussed.