Speaker
Description
The flavor composition of high-energy astrophysical neutrinos carries information about neutrino production and the conditions inside their sources. Neutrinos from charmed-hadron decays are usually neglected due to the suppressed heavy-flavor hadron production relative to pions and kaons. However, because of synchrotron losses, beyond the well-known transition from the pion-decay to the muon-damped regime, a second transition is expected at higher energies into a pion/kaon-damped regime, where charm can dominate the neutrino flux and leave a distinct flavor signature. In this talk, I will present these energy-dependent flavor transitions in a model-independent way and show the expected observations of the flavor composition across high energies and ultra-high energies.