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arXiv · 2512.10744

Exploring New Propagation Scales With Galactic Neutrinos

Miller MacDonald·Kiara Carloni·Carlos A. Argüelles·Ivan Martínez-Soler·Rafael Alves Batista
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Abstract

The recent observation of high-energy Galactic neutrinos by IceCube allows for searches of new physics affecting neutrino propagation on scales of $O(10^9-10^{15})\,\mathrm{km/GeV}$ in distance over energy. We assess the sensitivity of upcoming measurements of Galactic neutrinos by IceCube and KM3NeT to such new phenomena. We focus on two scenarios: quasi-Dirac neutrinos and neutrino decays. In the quasi-Dirac scenario, we find that joint measurements by IceCube and KM3NeT are sensitive to the mass-squared differences $\delta m^2 \in \left(10^{-13.6}~\mathrm{eV^2}, 10^{-12.3}~\mathrm{eV^2}\right)$ at the $90\%$ confidence level. For neutrino decays, the same measurements are sensitive to mass over lifetime ratios $m / \tau > 10^{-12.8}~\mathrm{eV^2}$ at the same significance. Our results demonstrate that measurements of Galactic neutrinos by a global network of neutrino telescopes can probe signatures of neutrino mass models.

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Miller MacDonald, Kiara Carloni, Carlos A. Argüelles, Ivan Martínez-Soler, Rafael Alves Batista. 2025-12-11. Exploring New Propagation Scales With Galactic Neutrinos. https://arxiv.org/abs/2512.10744

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