No Flavor Anisotropy in the High-Energy Neutrino Sky Upholds Lorentz Invariance

Abstract

Discovering Lorentz-invariance violation (LIV) would upend the foundations of modern physics. Because LIV effects grow with energy, high-energy astrophysical neutrinos provide the most sensitive tests of Lorentz invariance in the neutrino sector. We examine an understudied yet phenomenologically rich LIV signature: compass asymmetries, where neutrinos of different flavors propagate preferentially along different directions. Using the directional flavor composition of high-energy astrophysical neutrinos, i.e., the abundances of ${\nu }_e$, ${\nu }_{\mu }$, and ${\nu }_{\tau }$ across the sky, we find no evidence of LIV-induced flavor anisotropy in 7.5 years of IceCube High-Energy Starting Events. Thus, we place upper limits on the values of hundreds of LIV parameters with operator dimensions 2-8, tightening existing limits by orders of magnitude and bounding hundreds of parameters for the first time.

arXiv comment42 pages, 12 figures, plus tables of LIV limits. Matches published version

References in corpus (85)

• HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
• Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector
• Data Tables for Lorentz and CPT Violation
• Gravity, Lorentz Violation, and the Standard Model
• The fate of hints: updated global analysis of three-flavor neutrino oscillations
• Energy spectra of gamma-rays, electrons and neutrinos produced at proton-proton interactions in the very high energy regime
• Signals for Lorentz Violation in Electrodynamics
• From eV to EeV: Neutrino Cross Sections Across Energy Scales
• Detecting Nutau Oscillations as PeV Energies
• Detecting Tau Neutrino Oscillations at PeV Energies
• Revealing the High-Redshift Star Formation Rate with Gamma-Ray Bursts
• NuFit-6.0: Updated global analysis of three-flavor neutrino oscillations
• Lorentz and CPT Violation in Neutrinos
• Neutrinos with Lorentz-violating operators of arbitrary dimension
• Energy spectra of gamma-rays, electrons and neutrinos produced at interactions of relativistic protons with low energy radiation
• A statistical test for Nested Sampling algorithms
• Measuring Flavor Ratios of High-Energy Astrophysical Neutrinos
• Flavor Composition and Energy Spectrum of Astrophysical Neutrinos
• Collaborative Nested Sampling: Big Data vs. complex physical models
• What Do We Know About Lorentz Invariance?
• Flavoring Astrophysical Neutrinos: Flavor Ratios Depend on Energy
• Open Questions in Cosmic-Ray Research at Ultrahigh Energies
• Lorentz and CPT Violation in the Neutrino Sector
• Theoretically palatable flavor combinations of astrophysical neutrinos
• Cosmic Neutrino Pevatrons: A Brand New Pathway to Astronomy, Astrophysics, and Particle Physics
• Simplified models for photohadronic interactions in cosmic accelerators
• Lorentz Violation and Short-Baseline Neutrino Experiments
• Global three-parameter model for neutrino oscillations using Lorentz violation
• New Physics in Astrophysical Neutrino Flavor
• Precision Measurements with High Energy Neutrino Beams
• Perturbative Lorentz and CPT violation for neutrino and antineutrino oscillations
• Vetoing atmospheric neutrinos in a high energy neutrino telescope
• Neutrino Observatories Can Characterize Cosmic Sources and Neutrino Properties
• Testing decay of astrophysical neutrinos with incomplete information
• Spectral analysis of the high-energy IceCube neutrinos
• On the flavor composition of the high-energy neutrino events in IceCube
• Testing Relativity with High-Energy Astrophysical Neutrinos
• A generalized self-veto probability for atmospheric neutrinos
• Flavor Ratios of Astrophysical Neutrinos: Implications for Precision Measurements
• Lorentz and CPT Invariance Violation In High-Energy Neutrinos
• Propagation of tau neutrinos and tau leptons through the Earth and their detection in underwater/ice neutrino telescopes
• Inferring the flavor of high-energy astrophysical neutrinos at their sources
• The Future of High-Energy Astrophysical Neutrino Flavor Measurements
• Snowmass White Paper: Beyond the Standard Model effects on Neutrino Flavor
• Astrophysical neutrinos flavored with Beyond the Standard Model physics
• Analysis of the 4-year IceCube high-energy starting events
• Probes of Lorentz Violation
• Testing the equivalence principle and Lorentz invariance with PeV neutrinos from blazar flares
• Probing Particle Physics with IceCube
• Shower Power: Isolating the Prompt Atmospheric Neutrino Flux Using Electron Neutrinos
• Tau Neutrinos in the Next Decade: from GeV to EeV
• Oscillation effects on high-energy neutrino fluxes from astrophysical hidden sources
• Interplay of energy dependent astrophysical neutrino flavor ratios and new physics effects
• Energy-independent new physics in the flavour ratios of high-energy astrophysical neutrinos
• Flavor conversion of cosmic neutrinos from hidden jets
• Echo Technique to Distinguish Flavors of Astrophysical Neutrinos
• Limits on the Neutrino Velocity, Lorentz Invariance, and the Weak Equivalence Principle with TeV Neutrinos from Gamma-Ray Bursts
• Spacetime foam: a review
• Effects of a neutrino-dark energy coupling on oscillations of high-energy neutrinos
• Neutrino Oscillations, Lorentz/CPT Violation, and Dark Energy
• Impact of Secondary Acceleration in Gamma-Ray Bursts
• Testing Quantum Gravity via Cosmogenic Neutrino Oscillations
• Diffuse Ultra-High Energy Neutrino Fluxes and Physics Beyond the Standard Model
• Effect of Resonant Neutrino Oscillation on TeV Neutrino Flavor Ratio from Choked GRBs
• Limiting Superluminal Neutrino Velocity and Lorentz Invariance Violation by Neutrino Emission from the Blazar TXS 0506+056
• High energy astrophysical neutrino flux and modified dispersion relations
• TeV-PeV Neutrino Oscillation of Low-luminosity Gamma-ray Bursts
• Neutrino Flavor Ratios Modified by Cosmic Ray Secondary Acceleration
• Bump-hunting in the diffuse flux of high-energy cosmic neutrinos
• Constraints on Lorentz-invariance violation in the neutrino sector from the ultrahigh-energy event KM3-230213A
• The flavor composition of ultra-high-energy cosmic neutrinos: measurement forecasts for in-ice radio-based EeV neutrino telescopes
• The Milky Way shines in high-energy neutrinos
• Constraining the Mass Scale of a Lorentz-Violating Hamiltonian with the Measurement of Astrophysical Neutrino-Flavor Composition
• On the Tau flavor of the cosmic neutrino flux
• Beyond first light: Global monitoring for high-energy neutrino astronomy
• Two-detector flavor sensitivity to ultra-high-energy cosmic neutrinos
• Search for Lorentz-violation through sidereal effect at NOνA Experiment
• High-energy Neutrino Source Cross-correlations with Nearest-neighbor Distributions
• Neutrinos as possible probes for quantum gravity
• Cross-correlating IceCube neutrinos with a large set of galaxy samples around redshift z ~ 1
• Cosmological constraints on Lorentz invariance violation in the neutrino sector
• On testing in-vacuo dispersion with the most energetic neutrinos: KM3-230213A case study
• Consistency of Lorentz-invariance violation neutrino scenarios in time delay analyses
• Probing Lorentz invariance with a high-energy neutrino flare
• Anisotropic Lorentz invariance violation in reactor neutrino experiments