Proposes a new CLFV search in IceCube using cosmic-ray muons, deriving sensitivities for EFT operators and a Z' model, with comparisons to other experiments and projections for future telescopes.
First observation of PeV-energy neutrinos with IceCube
9 Pith papers cite this work. Polarity classification is still indexing.
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abstract
We report on the observation of two neutrino-induced events which have an estimated deposited energy in the IceCube detector of 1.04 $\pm$ 0.16 and 1.14 $\pm$ 0.17 PeV, respectively, the highest neutrino energies observed so far. These events are consistent with fully contained particle showers induced by neutral-current $\nu_{e,\mu,\tau}$ ($\bar\nu_{e,\mu,\tau}$) or charged-current $\nu_{e}$ ($\bar\nu_{e}$) interactions within the IceCube detector. The events were discovered in a search for ultra-high energy neutrinos using data corresponding to 615.9 days effective livetime. The expected number of atmospheric background is $0.082 \pm 0.004 \text{(stat)}^{+0.041}_{-0.057} \text{(syst)}$. The probability to observe two or more candidate events under the atmospheric background-only hypothesis is $2.9\times10^{-3}$ ($2.8\sigma$) taking into account the uncertainty on the expected number of background events. These two events could be a first indication of an astrophysical neutrino flux, the moderate significance, however, does not permit a definitive conclusion at this time.
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Electron stability observations rule out the subluminal LIV parameters previously used to explain high-energy neutrino time delays.
A new analytic Askaryan model including ice propagation and RF response matches Monte Carlo simulations with correlations above 0.94 and rejects thermal noise at very low rates.
If Little Red Dots accelerate protons to ~10 EeV, their interactions with the high-redshift CMB produce a ~50 PeV cosmogenic neutrino bump consistent with IceCube.
Escaping cosmic rays accelerate and heat the ISM in CR-hydro simulations, driving galactic winds comparable to the star formation rate and providing alternative explanations for the local proton spectrum under locally suppressed diffusion.
Monte Carlo simulations of nuclear cascades in NGC 1068 demonstrate that injected nuclear composition imprints on neutrino and gamma-ray spectra, supported by a re-analysis of archival COMPTEL observations.
Carpet reports first results from a search for astrophysical gamma rays with energies above 100 TeV using an air-shower array equipped with muon discrimination.
Recent high and ultrahigh energy neutrino detections open a new observational window to the universe by revealing sources and processes inaccessible via photons.
citing papers explorer
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Charged Lepton Flavor Violation at Neutrino Telescopes
Proposes a new CLFV search in IceCube using cosmic-ray muons, deriving sensitivities for EFT operators and a Z' model, with comparisons to other experiments and projections for future telescopes.
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Electron stability constrains neutrino time delays
Electron stability observations rule out the subluminal LIV parameters previously used to explain high-energy neutrino time delays.
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Complex Analysis of Askaryan Radiation: UHE-$\nu$ Identification and Reconstruction using the Hilbert Envelope of Observed Signals
A new analytic Askaryan model including ice propagation and RF response matches Monte Carlo simulations with correlations above 0.94 and rejects thermal noise at very low rates.
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Ultrahigh-energy cosmogenic neutrino emissions in the high-redshift universe
If Little Red Dots accelerate protons to ~10 EeV, their interactions with the high-redshift CMB produce a ~50 PeV cosmogenic neutrino bump consistent with IceCube.
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Interplay between Escaping Cosmic Rays and Interstellar Medium: Driving of Galactic Winds and Shaping the Local Proton Spectrum
Escaping cosmic rays accelerate and heat the ISM in CR-hydro simulations, driving galactic winds comparable to the star formation rate and providing alternative explanations for the local proton spectrum under locally suppressed diffusion.
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Nuclei in high-energy neutrino sources: A multimessenger study of in-source propagation
Monte Carlo simulations of nuclear cascades in NGC 1068 demonstrate that injected nuclear composition imprints on neutrino and gamma-ray spectra, supported by a re-analysis of archival COMPTEL observations.
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Carpet results on astrophysical gamma rays above 100 TeV
Carpet reports first results from a search for astrophysical gamma rays with energies above 100 TeV using an air-shower array equipped with muon discrimination.
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Particle Astrophysics with High and Ultrahigh Energy Neutrinos
Recent high and ultrahigh energy neutrino detections open a new observational window to the universe by revealing sources and processes inaccessible via photons.
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