We critically examine the ability of future neutrino telescopes, including Baikal-GVD,
KM3NeT, P-ONE, TAMBO, and IceCube-Gen2, to determine the flavor composition of high …

The flavor composition of high-energy astrophysical neutrinos can reveal the physics
governing their production, propagation, and interaction. The IceCube Collaboration has …

Astrophysical neutrinos are powerful tools for investigating the fundamental properties of
particle physics through their flavor content. In this Letter, we perform the first general new …

The flavor of cosmic neutrinos may help unveil their sources and could reveal the presence
of new physics in the neutrino sector. We consider impacts of next-generation neutrino …

A full energy and flavor-dependent analysis of the three-year high-energy IceCube neutrino
events is presented. By means of multidimensional fits, we derive the current preferred …

In-ice radio detection is a promising technique to discover and characterize ultrahigh-energy
(UHE) neutrinos, with energies above 10 17 eV, adopted by present—ARA, ARIANNA, and …

We discuss how to constrain new physics in the neutrino sector using multimessenger
astronomical observations by the IceCube experiment. The information from time and …

Light gauge bosons can lead to resonant interactions between high-energy astrophysical
neutrinos and the cosmic neutrino background. We study this possibility in detail …

Since neutrinos have mass differences they could decay into one another, but their lifetimes
are likely long, even when shortened by new physics, so decay likely impacts neutrinos only …

After four years of data taking, the IceCube neutrino telescope has detected 54 high-energy
starting events (HESE, or contained-vertex events) with deposited energies above 20 TeV …