Münster 2017 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 82: Neutrinoastronomie 3

T 82.6: Vortrag

Mittwoch, 29. März 2017, 18:05–18:20, H 1

Search for High-Energy Tau Neutrino Interactions in IceCube — •Juliana Stachurska for the IceCube collaboration — DESY Zeuthen

The IceCube Neutrino Observatory at the South Pole detects Cherenkov light from charged particles produced in neutrino interactions. At the highest energies, the neutrino flux is of cosmic origin, with an expected flavor ratio of ν_e:ν_µ:ν_τ of 1:1:1, but its astrophysical sources are yet unknown. A measurement of the flavor ratio on Earth can provide important information to constrain sources and production mechanisms. But as of today, no high energy tau neutrino interaction has been identified in the IceCube data, leaving the ν_τ fraction of the cosmic neutrino flux largely unconstrained. This work aims at identifying high-energy tau neutrino interactions creating tau leptons with a mean decay length of 50m per PeV neutrino energy. Above energies of ∼ 100 TeV they produce a unique Double Bang signature with two cascades from the neutrino interaction and the subsequent tau decay that are potentially resolvable in IceCube.