Determination of the Neutrino Flavor Ratio at the Astrophysical Source

Abstract

We discuss the reconstruction of neutrino flavor ratios at astrophysical sources through the future neutrino-telescope measurements. Taking the ranges of neutrino mixing parameters ${\theta }_{ij}$ as those given by the current global fit, we demonstrate by a statistical method that the accuracies in the measurements of energy-independent ratios $R\equiv \varphi ({\nu }_{\mu })/(\varphi ({\nu }_e)+\varphi ({\nu }_{\tau }))$ and $S\equiv \varphi ({\nu }_e)/\varphi ({\nu }_{\tau })$ among integrated neutrino flux should both be better than 10% in order to distinguish between the pion source and the muon-damped source at the $3\sigma$ level. The 10% accuracy needed for measuring $R$ and $S$ requires an improved understanding on the background atmospheric neutrino flux to a better than 10% level in the future. We discuss the applicability of our analysis to practical situations that the diffuse astrophysical neutrino flux arises from different types of sources and each point source has a neutrino flavor ratio varying with energies. We also discuss the effect of leptonic CP phase on the flavor-ratio reconstruction.

Figures corrected, Discussions on the feasibility of measuring various flux ratios added; version to appear in Phys. Rev. D

References in corpus (16)

• Phenomenology with Massive Neutrinos
• Uncertainties in Atmospheric Neutrino Fluxes
• Flavor Ratios of Astrophysical Neutrinos: Implications for Precision Measurements
• Testing neutrino flavor mixing plus decay with neutrino telescopes
• How astrophysical neutrino sources could be used for early measurements of neutrino mass hierarchy and leptonic CP phase
• Five years of searches for point sources of astrophysical neutrinos with the AMANDA-II neutrino telescope
• Expected neutrino signal from supernova remnant RX J1713.7-3946 and flavor oscillations
• Neutrino flux ratios at neutrino telescopes: The role of uncertainties of neutrino mixing parameters and applications to neutrino decay
• Towards Determination of the Initial Flavor Composition of Ultrahigh-energy Neutrino Fluxes with Neutrino Telescopes
• Neutrino Telescopes as a Probe of Broken $\mu$-$\tau$ Symmetry
• Neutrinos from galactic sources of cosmic rays with known gamma-ray spectra
• High energy neutrino yields from astrophysical sources II: Magnetized sources
• Oscillation effects on high-energy neutrino fluxes from astrophysical hidden sources
• Probing deviations from tri-bimaximal mixing through ultra high energy neutrino signals
• On Probing theta_{23} in Neutrino Telescopes
• Conflict between the identification of cosmic neutrino source and the sensitivity to mixing angles in neutrino telescope

Cited by in corpus (28)

• The Giant Radio Array for Neutrino Detection (GRAND): Science and Design
• Theoretically palatable flavor combinations of astrophysical neutrinos
• Testing decay of astrophysical neutrinos with incomplete information
• Spectral analysis of the high-energy IceCube neutrinos
• Inferring the flavor of high-energy astrophysical neutrinos at their sources
• Astrophysical neutrinos flavored with Beyond the Standard Model physics
• Flavor Composition of UHE Neutrinos at Source and at Neutrino Telescopes
• Analysis of the 4-year IceCube high-energy starting events
• Universe's Worth of Electrons to Probe Long-Range Interactions of High-Energy Astrophysical Neutrinos
• Flavor of cosmic neutrinos preserved by ultralight dark matter
• Energy-independent new physics in the flavour ratios of high-energy astrophysical neutrinos
• Sterile Neutrinos and Flavor Ratios in IceCube
• Echo Technique to Distinguish Flavors of Astrophysical Neutrinos
• Unitarity Bounds of Astrophysical Neutrinos
• A Model for Pseudo-Dirac Neutrinos: Leptogenesis and Ultra-High Energy Neutrinos
• Flavor ratios of extragalactical neutrinos and neutrino shortcuts in extra dimensions
• IceCube Flavor Ratios with Identified Astrophysical Sources: Towards Improving New Physics Testability
• Neutrino fluxes from Dark Matter in the HESS J1745-290 source at the Galactic Center
• Flavors of Astrophysical Neutrinos with Active-Sterile Mixing
• Feasibility of Determining Diffuse Ultra-High Energy Cosmic Neutrino Flavor Ratio through ARA Neutrino Observatory
• Tau Appearance from High-Energy Neutrino Interactions
• A further study of μ-τsymmetry breaking at neutrino telescopes after the Daya Bay and RENO measurements of θ_{13}
• Flavor Transition Mechanisms of Propagating Astrophysical Neutrinos -A Model Independent Parametrization
• Cosmic e^\pm, \bar p, γand neutrino rays in leptocentric dark matter models
• Sensitivities of IceCube DeepCore Detector to Signatures of Low-Mass Dark Matter in the Galactic Halo
• Probing Neutrino Flavor Transition Mechanism with Ultra High Energy Astrophysical Neutrinos
• Neutrinos from Cosmic Accelerators Including Magnetic Field and Flavor Effects
• Spread Complexity of High Energy Neutrino Propagation over Astrophysical Distances