There is vast potential to test new physics with high-energy cosmic neutrinos, and the community has started doing it.  As a way to help guide our collective efforts, we came up with a classification scheme of new-physics models:

The scheme classifies models according to the stages of the neutrino lifetime at which they may act — at production, during propagation, at detection — and what observables they may affect — energy spectrum, arrival directions, flavor composition, arrival times.

(The list of models above is representative, not exhaustive.)

For more information see:

• ICRC 2019 proceedings: Fundamental physics with high-energy cosmic neutrinos today and in the future (1907.08690), Carlos A. Argüelles, Mauricio Bustamante, Ali Kheirandish, Sergio Palomares-Ruiz, Jordi Salvado, Aaron C. Vincent

• My ICRC 2019 slides (click here)