Tau neutrino appearance with IceCube-DeepCore

The DeepCore sub-array of the IceCube Neutrino Observatory measures neutrino oscillations at mathcal{O}(10 GeV), above the tau neutrino charged current interaction threshold. This enables world-leading measurements of atmospheric tau neutrino appearance - a crucial input to global tests of PMNS unitarity - and the detector’s vast 10 Mton mass yields unparalleled tau neutrino statistics. Here we present the latest tau neutrino appearance measurement with IceCube-DeepCore using nine years of data.