Contribution Poster high energy neutrinos & cosmic rays
Electromagnetic interactions and oscillations of ultrahigh-energy cosmic neutrinos in interstellar space
Session and Location
Wednesday Session, Poster Wall #199 (Ballroom)
We present a theoretical analysis  of possible influence of neutrino magnetic moments on the propagation of ultrahigh-energy cosmic neutrinos in the interstellar space under the assumption of two-neutrino mixing. The exact solution of the effective equation for neutrino evolution in the presence of a magnetic field and matter is obtained, which accounts for four neutrino species corresponding to two different flavor states with positive and negative helicities. Using most stringent astrophysical bounds on the putative neutrino magnetic moment, probabilities of neutrino flavor and spin oscillations are calculated on the basis of the obtained exact solution. Specific neutrino-oscillation patterns are determined for neutrino-energy values characteristic of, respectively, the cosmogenic neutrinos, the Greisen-Zatsepin- Kuz’min cutoff, and well above the cutoff.
 P. Kurashvili, K. A. Kouzakov, L. Chotorlishvili, and A. I. Studenikin, Phys. Rev. D 96, 103017 (2017).
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