Aachen 2019 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 55: Neutrinophysik III

T 55.8: Vortrag

Mittwoch, 27. März 2019, 18:00–18:15, H05

ORCA sensitivity to ν_τ appearance — •Lukas Maderer for the KM3NeT-ECAP collaboration — ECAP / Universität Erlangen-Nürnberg

The deep-sea neutrino detector KM3NeT/ORCA is optimized to study oscillations of atmospheric neutrinos in the few-GeV energy range. Apart from the primary science goal of ORCA - to resolve the neutrino mass hierarchy - the detector will be sensitive to the ν_τ flux developing from oscillations from a purely ν_µ and ν_e atmospheric flux along its passage through the Earth. Precise measurements of the ν_τ flux normalization facilitate the investigation of deviations from the expected unitarity of the PMNS matrix.

The upcoming installation of its first detector strings (about 5% of full detector with 115 strings) will already provide considerable atmospheric neutrino statistics with about 450 detected ν_τ events per year. This talk will present performance studies of a 7-string ORCA array and its sensitivity to exclude ν_τ non-appearance within the first months of operation.