All-flavor constraints on nonstandard neutrino interactions and generalized matter potential with three years of IceCube DeepCore data

Abstract

We report constraints on nonstandard neutrino interactions (NSI) from the observation of atmospheric neutrinos with IceCube, limiting all individual coupling strengths from a single dataset. Furthermore, IceCube is the first experiment to constrain flavor-violating and nonuniversal couplings simultaneously. Hypothetical NSI are generically expected to arise due to the exchange of a new heavy mediator particle. Neutrinos propagating in matter scatter off fermions in the forward direction with negligible momentum transfer. Hence the study of the matter effect on neutrinos propagating in the Earth is sensitive to NSI independently of the energy scale of new physics. We present constraints on NSI obtained with an all-flavor event sample of atmospheric neutrinos based on three years of IceCube DeepCore data. The analysis uses neutrinos arriving from all directions, with reconstructed energies between 5.6 GeV and 100 GeV. We report constraints on the individual NSI coupling strengths considered singly, allowing for complex phases in the case of flavor-violating couplings. This demonstrates that IceCube is sensitive to the full NSI flavor structure at a level competitive with limits from the global analysis of all other experiments. In addition, we investigate a generalized matter potential, whose overall scale and flavor structure are also constrained.

22 pages, 12 figures. This submission matches the published version

References in corpus (15)

• Updated fit to three neutrino mixing: exploring the accelerator-reactor complementarity
• Non-standard neutrino interactions in reactor and superbeam experiments
• Atmospheric neutrinos as probes of neutrino-matter interactions
• Large gauge invariant non-standard neutrino interactions
• Determining neutrino oscillation parameters from atmospheric muon neutrino disappearance with three years of IceCube DeepCore data
• The low-scale approach to neutrino masses
• Measurement of Atmospheric Tau Neutrino Appearance with IceCube DeepCore
• Perturbation Theory of Neutrino Oscillation with Nonstandard Neutrino Interactions
• Testing matter effects in propagation of atmospheric and long-baseline neutrinos
• Non-standard interactions with high-energy atmospheric neutrinos at IceCube
• Combined sensitivity to the neutrino mass ordering with JUNO, the IceCube Upgrade, and PINGU
• Non-Standard Neutrino Interactions from a Triplet Seesaw Model
• Neutrino Non-Standard Interactions: Complementarity Between LHC and Oscillation Experiments
• The Physical Range of Majorana Neutrino Mixing Parameters
• Approximative two-flavor framework for neutrino oscillations with nonstandard interactions