Differential limit on the extremely-high-energy cosmic neutrino flux in the presence of astrophysical background from nine years of IceCube data

Abstract

We report a quasi-differential upper limit on the extremely-high-energy (EHE) neutrino flux above $5\times 10^6$ GeV based on an analysis of nine years of IceCube data. The astrophysical neutrino flux measured by IceCube extends to PeV energies, and it is a background flux when searching for an independent signal flux at higher energies, such as the cosmogenic neutrino signal. We have developed a new method to place robust limits on the EHE neutrino flux in the presence of an astrophysical background, whose spectrum has yet to be understood with high precision at PeV energies. A distinct event with a deposited energy above $10^6$ GeV was found in the new two-year sample, in addition to the one event previously found in the seven-year EHE neutrino search. These two events represent a neutrino flux that is incompatible with predictions for a cosmogenic neutrino flux and are considered to be an astrophysical background in the current study. The obtained limit is the most stringent to date in the energy range between $5\times 10^6$ and $5\times 10^{10}$ GeV. This result constrains neutrino models predicting a three-flavor neutrino flux of $E_{\nu }^2{\varphi }_{{\nu }_e+{\nu }_{\mu }+{\nu }_{\tau }}\simeq 2\times 10^{-8}\mathrm{GeV}/{\mathrm{cm}}^2\sec \mathrm{sr}$ at $10^9\mathrm{GeV}$. A significant part of the parameter-space for EHE neutrino production scenarios assuming a proton-dominated composition of ultra-high-energy cosmic rays is excluded.

arXiv commentThe version accepted for publication in Physical Review D

References in corpus (40)

• A Unified Approach to the Classical Statistical Analysis of Small Signals
• On the normalisation of the cosmic star formation history
• Observation of High-Energy Astrophysical Neutrinos in Three Years of IceCube Data
• The IceCube Neutrino Observatory: Instrumentation and Online Systems
• The spectrum of isotropic diffuse gamma-ray emission between 100 MeV and 820 GeV
• First observation of PeV-energy neutrinos with IceCube
• Observation and Characterization of a Cosmic Muon Neutrino Flux from the Northern Hemisphere using six years of IceCube data
• Cosmic ray event generator Sibyll 2.1
• On astrophysical solution to ultra high energy cosmic rays
• Observation of a Large-scale Anisotropy in the Arrival Directions of Cosmic Rays above $8\times 10^{18}$ eV
• Revealing the High-Redshift Star Formation Rate with Gamma-Ray Bursts
• Diffuse Neutrino Intensity from the Inner Jets of Active Galactic Nuclei: Impacts of External Photon Fields and the Blazar Sequence
• Prompt neutrino fluxes from atmospheric charm
• Energy Reconstruction Methods in the IceCube Neutrino Telescope
• Cosmogenic Neutrinos: parameter space and detectabilty from PeV to ZeV
• Muon Track Reconstruction and Data Selection Techniques in AMANDA
• GZK Neutrinos after the Fermi-LAT Diffuse Photon Flux Measurement
• The IceCube Realtime Alert System
• An improved limit to the diffuse flux of ultra-high energy neutrinos from the Pierre Auger Observatory
• Performance of two Askaryan Radio Array stations and first results in the search for ultra-high energy neutrinos
• A First Search for Cosmogenic Neutrinos with the ARIANNA Hexagonal Radio Array
• ANIS: High Energy Neutrino Generator for Neutrino Telescopes
• Restricting UHECRs and cosmogenic neutrinos with Fermi-LAT
• Unbiased cut selection for optimal upper limits in neutrino detectors: the model rejection potential technique
• Prompt atmospheric neutrino fluxes: perturbative QCD models and nuclear effects
• Neutrino Bounds on Astrophysical Sources and New Physics
• Constraints on the Extremely-high Energy Cosmic Neutrino Flux with the IceCube 2008-2009 Data
• Constraints on the diffuse high-energy neutrino flux from the third flight of ANITA
• Cosmogenic Neutrinos Challenge the Cosmic Ray Proton Dip Model
• The prompt atmospheric neutrino flux in the light of LHCb
• Probing the origin of cosmic-rays with extremely high energy neutrinos using the IceCube Observatory
• Cosmogenic neutrinos and ultra-high energy cosmic ray models
• Extragalactic background Light: a measurement at 400 nm using dark cloud shadow II. Spectroscopic separation of dark cloud's light, and results
• Propagation of Extremely-high Energy Leptons in the Earth: Implications to their detection by the IceCube Neutrino Telescope
• Constraints on the origin of ultra-high-energy cosmic rays from cosmogenic neutrinos and photons
• Cascade photons as test of protons in UHECR
• Improvement in Fast Particle Track Reconstruction with Robust Statistics
• The first search for extremely-high energy cosmogenic neutrinos with the IceCube Neutrino Observatory
• Constraints on the origin of the ultra-high energy cosmic-rays using cosmic diffuse neutrino flux limits: An analytical approach
• Probing the Extragalactic Cosmic Rays origin with gamma-ray and neutrino backgrounds

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