Probing Pseudo-Dirac Neutrinos with Astrophysical Sources at IceCube

Abstract

The recent observation of NGC 1068 by the IceCube Neutrino Observatory has opened a new window to neutrino physics with astrophysical baselines. In this Letter, we propose a new method to probe the nature of neutrino masses using these observations. In particular, our method enables searching for signatures of pseudo-Dirac neutrinos with mass-squared differences that reach down to $\delta m^2\gtrsim 10^{-21}{\text{eV}}^2$, improving the reach of terrestrial experiments by more than a billion. Finally, we discuss how the discovery of a constellation of neutrino sources can further increase the sensitivity and cover a wider range of $\delta m^2$ values.

8 pages, 9 figures. Version 2: improved detector modeling, and added appendices discussing the effects of energy reconstruction on this analysis

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Cited by in corpus (6)

• Pseudo-Dirac Neutrinos and Relic Neutrino Matter Effect on the High-energy Neutrino Flavor Composition
• Constraining the pseudo-Dirac nature of neutrinos using astrophysical neutrino flavor data
• Cosmogenic neutrinos as probes of new physics
• Comparison of Geometrical Layouts for Next-Generation Large-volume Cherenkov Neutrino Telescopes
• Boomerang mechanism explaining the excess radio background
• Cosmic neutrino background detection in the minimally extended Standard Model