Scientific article
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Measurement of atmospheric neutrino mixing with improved IceCube DeepCore calibration and data processing

ContributorsIceCube Collaboration
Published inPhysical review. D, vol. 108, 012014
Publication date2023
First online date2023-07-20
Abstract

We describe a new data sample of IceCube DeepCore and report on the latest measurement of atmospheric neutrino oscillations obtained with data recorded between 2011–2019. The sample includes significant improvements in data calibration, detector simulation, and data processing, and the analysis benefits from a sophisticated treatment of systematic uncertainties, with significantly greater level of detail since our last study. By measuring the relative fluxes of neutrino flavors as a function of their reconstructed energies and arrival directions we constrain the atmospheric neutrino mixing parameters to be sin2θ23=0.51±0.05 and Δm322=2.41±0.07×10-3  eV2, assuming a normal mass ordering. The errors include both statistical and systematic uncertainties. The resulting 40% reduction in the error of both parameters with respect to our previous result makes this the most precise measurement of oscillation parameters using atmospheric neutrinos. Our results are also compatible and complementary to those obtained using neutrino beams from accelerators, which are obtained at lower neutrino energies and are subject to different sources of uncertainties.

Keywords
  • Neutrino: atmosphere
  • Neutrino: mixing
  • Neutrino: energy
  • Neutrino: flavor
  • Neutrino: oscillation
  • Neutrino: mixing angle: measured
  • Neutrino: mass difference
  • Mass difference: measured
  • Neutrino: flux
  • IceCube
  • Calibration
  • Accelerator
  • Numerical calculations: Monte Carlo
  • Experimental results
Citation (ISO format)
IceCube Collaboration. Measurement of atmospheric neutrino mixing with improved IceCube DeepCore calibration and data processing. In: Physical review. D, 2023, vol. 108, p. 012014. doi: 10.1103/physrevd.108.012014
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Article (Published version)
Identifiers
Additional URL for this publicationhttps://link.aps.org/doi/10.1103/PhysRevD.108.012014
Journal ISSN2470-0010
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