Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 43: Neutrino physics without accelerators II

T 43.9: Talk

Tuesday, March 16, 2021, 18:00–18:15, Tr

Search for non-standard neutrino interactions with 8 years of IceCube DeepCore data — •Elisa Lohfink and Sebastian Böser for the IceCube collaboration — Institut für Physik, JGU Mainz, Deutschland

Non-standard neutrino interactions (NSI) are well motivated and result in a change of the potential that neutrinos encounter when traversing matter, hence altering their oscillation patterns. This signature can be probed using high-statistics neutrino experiments such as IceCube and its low-energy extension DeepCore which detect atmospheric neutrinos after propagating through matter at baselines up to the Earth diameter. The event selection that this search is based on includes 8 years of IceCube-DeepCore data, containing all neutrino flavors. It reaches from the few-GeV DeepCore energy threshold up to several hundred GeV and constitutes a significant increase in statistics with respect to previous searches. In addition, the treatment of systematic uncertainties, background rejection and event reconstruction have been improved substantially. This sample allows us to probe not only NSI in the μ-τ sector, as is commonly done, but also those involving the electron flavor.