Abstract
Acceleration of ’s and ’s modifies the flavor ratio at Earth (at astrophysical sources) of neutrinos produced by decay, , from () to () at high energy, because ’s decay more than ’s during secondary acceleration. The neutrino spectrum accompanies a flat excess, differently from the case of energy losses. With the flavor spectra, we can probe time scales of cosmic-ray acceleration and shock dynamics. We obtain general solutions of convection-diffusion equations and apply them to gamma-ray bursts, which may have the flavor modification at around PeV–EeV detectable by IceCube and next-generation experiments.
- Received 20 April 2015
DOI:https://doi.org/10.1103/PhysRevD.92.085047
© 2015 American Physical Society