Exploring ν_τ- ν_s mixing with cascade events in DeepCore

Abstract

The atmospheric neutrino data collected by the IceCube experiment and its low-energy extension DeepCore provide a unique opportunity to probe the neutrino sector of the Standard Model. In the low energy range the experiment have observed neutrino oscillations, and the high energy data are especially sensitive to signatures of new physics in the neutrino sector. In this context, we previously demonstrated the unmatched potential of the experiment to reveal the existence of light sterile neutrinos. The studies are routinely performed in the simplest 3+1 model concentrating on disappearance of muon neutrinos of TeV energy as a result of their mixing with a sterile neutrino. We here extend this analysis to include cascade events that are secondary electromagnetic and hadronic showers produced by neutrinos of all flavors. We find that it is possible to probe the complete parameter space of 3+1 model, including the poorly constrained mixing of the sterile neutrino to tau neutrinos. We show that ${\nu }_{\tau }-{\nu }_s$ mixing results into a unique signature in the data that will allow IceCube to obtain constraints well below the current upper limits.

20 pages, 9 figures; v2: several clarifications added, matches published version at JCAP

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• First Constraints on the Complete Neutrino Mixing Matrix with a Sterile Neutrino
• Activating the 4th Neutrino of the 3+1 Scheme
• Restricting the LSND and MiniBooNE sterile neutrinos with the IceCube atmospheric neutrino data
• DUNE sensitivities to the mixing between sterile and tau neutrinos
• Impact of sterile neutrinos on the early time flux from a galactic supernova
• Testing non-standard neutrino matter interactions in atmospheric neutrino propagation
• Sterile neutrinos in the light of IceCube
• Constraining the Violation of Equivalence Principle with IceCube Atmospheric Neutrino Data
• On the robustness of IceCube's bound on sterile neutrinos in the presence of non-standard interactions
• Probing Large Extra Dimensions With IceCube
• Active-sterile neutrino oscillations at INO-ICAL over a wide mass-squared range
• IceCube bounds on sterile neutrinos above 10 eV
• Probing light sterile neutrinos in medium baseline reactor experiments
• Light sterile neutrino sensitivity of 163Ho experiments
• What measurements of neutrino neutral current events can reveal
• IceCube Sterile Neutrino Searches
• First Search for Unstable Sterile Neutrinos with the IceCube Neutrino Observatory
• Cascade Appearance Signatures of Sterile Neutrinos at 1-100 TeV
• A Light Sterile Neutrino from Friedberg-Lee Symmetry
• Violation of Equivalence Principle in Neutrino Sector: Probing the Extended Parameter Space
• Effects of Majorana Physics on the UHE ${\nu }_{\tau }$ Flux Traversing the Earth
• Sensitivity of Hyper-Kamiokande to sub-eV Sterile Neutrinos
• Atmospheric neutrinos, $n{u}_e-n{u}_s$ oscillations, and a novel neutrino evolution equation
• Oscillations Beyond Three-Neutrino Mixing