Flavor Ratios and Mass Hierarchy at Neutrino Telescopes

Understand

The observation of high-energy extraterrestrial neutrinos at IceCube represents the beginning of the era of neutrino astronomy.

• In this paper, we study the cosmic neutrino flavor ratios against the Dirac CP-violating phase at neutrino telescopes, taking into account the charged-current and neutral-current interactions at the detectors.
• We then demonstrate how to probe mass hierarchy at future neutrino telescopes by the precise measurements of the cosmic neutrino flavor ratios.
• We show that the sensitivity of our scheme is independent of the undetermined values of the Dirac CP-violating phase.