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.
First observation of PeV-energy neutrinos with IceCube
5 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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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.
High-redshift AGN emitting UHE protons up to 10^19 eV generate a 50 PeV cosmogenic neutrino bump consistent with IceCube data from their JWST-measured average properties without fine-tuning.
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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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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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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Ultrahigh-energy cosmogenic neutrino emissions in the high-redshift universe
High-redshift AGN emitting UHE protons up to 10^19 eV generate a 50 PeV cosmogenic neutrino bump consistent with IceCube data from their JWST-measured average properties without fine-tuning.
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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.