No evidence for long-range neutrino interactions from a broad class of anomaly-free U(1)' symmetries is found in 8 years of IceCube DeepCore atmospheric data, producing stringent constraints on the corresponding LRI potentials and mediator parameters.
Measurement of Atmospheric Neutrino Oscillations at 6-56 GeV with IceCube DeepCore
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abstract
We present a measurement of the atmospheric neutrino oscillation parameters using three years of data from the IceCube Neutrino Observatory. The DeepCore infill array in the center of IceCube enables detection and reconstruction of neutrinos produced by the interaction of cosmic rays in the Earth's atmosphere at energies as low as $\sim5$ GeV. That energy threshold permits measurements of muon neutrino disappearance, over a range of baselines up to the diameter of the Earth, probing the same range of $L/E_\nu$ as long-baseline experiments but with substantially higher energy neutrinos. This analysis uses neutrinos from the full sky with reconstructed energies from $5.6$ - $56$ GeV. We measure $\Delta m^2_{32}=2.31^{+0.11}_{-0.13} \times 10^{-3}$ eV$^2$ and $\sin^2 \theta_{23}=0.51^{+0.07}_{-0.09}$, assuming normal neutrino mass ordering. These results are consistent with, and of similar precision to, those from accelerator and reactor-based experiments.
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hep-ph 4representative citing papers
7.5-year IceCube DeepCore νμ CC data give δ_CP-free 90% CL bounds |ε_eμ|≤0.12 and |ε_eτ|≤0.18, consistent with standard interactions.
IceCube DeepCore data constrains non-unitary neutrino mixing with α33 > -0.027 at 90% CL and no evidence for deviation from unitarity.
Updated global fit of neutrino oscillation data gives precise measurements of mixing parameters with a 2.5 sigma preference for normal mass ordering.
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Constraints on long-range neutrino interactions from a variety of $U(1)^\prime$ symmetries using atmospheric neutrinos at IceCube DeepCore
No evidence for long-range neutrino interactions from a broad class of anomaly-free U(1)' symmetries is found in 8 years of IceCube DeepCore atmospheric data, producing stringent constraints on the corresponding LRI potentials and mediator parameters.
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$\delta_{CP}$-free constraints on NSI parameters $\varepsilon_{e\mu}$ and $\varepsilon_{e\tau}$ using high-purity $\nu_\mu$ CC events at IceCube DeepCore
7.5-year IceCube DeepCore νμ CC data give δ_CP-free 90% CL bounds |ε_eμ|≤0.12 and |ε_eτ|≤0.18, consistent with standard interactions.
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New constraints on non-unitary neutrino mixing from 8 years of IceCube DeepCore atmospheric neutrino data
IceCube DeepCore data constrains non-unitary neutrino mixing with α33 > -0.027 at 90% CL and no evidence for deviation from unitarity.
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2020 Global reassessment of the neutrino oscillation picture
Updated global fit of neutrino oscillation data gives precise measurements of mixing parameters with a 2.5 sigma preference for normal mass ordering.