Theoretically palatable flavor combinations of astrophysical neutrinos
Mauricio Bustamante (1, 2), John F. Beacom (1, 2, 3), Walter, Winter (4) ((1) Ohio State U., CCAPP, (2) Ohio State U., (3) Ohio State U.,, Dept. Astron., (4) DESY, Zeuthen)
TL;DR
This paper provides theoretical predictions for the range of astrophysical neutrino flavor ratios at Earth, aiding interpretation of IceCube data to distinguish standard physics from new physics scenarios.
Contribution
It offers new theoretical results for flavor ratio ranges at Earth for arbitrary source ratios, enhancing the analysis of neutrino data for physics beyond the Standard Model.
Findings
Allowed flavor ratio ranges at Earth for various source ratios
Framework to distinguish standard physics from new physics in neutrino data
Facilitates rapid interpretation of IceCube observations
Abstract
The flavor composition of high-energy astrophysical neutrinos can reveal the physics governing their production, propagation, and interaction. The IceCube Collaboration has published the first experimental determination of the ratio of the flux in each flavor to the total. We present, as a theoretical counterpart, new results for the allowed ranges of flavor ratios at Earth for arbitrary flavor ratios in the sources. Our results will allow IceCube to more quickly identify when their data imply standard physics, a general class of new physics with arbitrary (incoherent) combinations of mass eigenstates, or new physics that goes beyond that, e.g., with terms that dominate the Hamiltonian at high energy.
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