The galactic contribution to IceCube's astrophysical neutrino flux

Denton, Peter B.; Marfatia, Danny; Weiler, T.

doi:10.1088/1475-7516/2017/08/033

Cited by 57 publications

(50 citation statements)

References 70 publications

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“…Although our result is significantly larger than the one obtained by other authors * (e.g., only 0.1 galactic events among IceCube's three year data in [15]), it is still unable to explain the high-energy IceCube excess. It is also consistent with a recent likelihood analysis [25] indicating that the galactic contribution to total IceCube signal is subleading (around 7%) or with the total estimate (including point-like sources) in [26] (4-8%).…”

Section: Introductionsupporting

confidence: 92%

Origin of the High-energy Neutrino Flux at IceCube

Carceller¹,

Illana²,

Masip³

et al. 2018

ApJ

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We discuss the spectrum of the different components in the astrophysical neutrino flux reaching the Earth and the possible contribution of each component to the highenergy IceCube data. We show that the diffuse flux from cosmic ray interactions with gas in our galaxy implies just 2 events among the 54 event sample. We argue that the neutrino flux from cosmic ray interactions in the intergalactic (intracluster) space depends critically on the transport parameter δ describing the energy dependence in the diffusion coefficient of galactic cosmic rays. Our analysis motivates a E −2.1 neutrino spectrum with a drop at PeV energies that fits well the data, including the nonobservation of the Glashow resonance at 6.3 PeV. We also show that a cosmic ray flux described by an unbroken power law may produce a neutrino flux with interesting spectral features (bumps and breaks) related to changes in the cosmic ray composition.

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Section: Introductionsupporting

confidence: 92%

Origin of the High-energy Neutrino Flux at IceCube

Carceller¹,

Illana²,

Masip³

et al. 2018

ApJ

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“…Recently an extra-terrestrial flux of neutrinos extending above 10 15 eV has been detected with IceCube [17]. The origin of this flux is unknown and while it is dominated by extragalactic sources [18] it is not expected to be due to the UHE cosmic ray interaction with cosmic photon backgrounds [19,20]. It is also unknown the extent to which the detected flux can be extrapolated to the UHE band or if there is a cutoff energy [21].…”

Section: Introductionmentioning

confidence: 99%

Comprehensive approach to tau-lepton production by high-energy tau neutrinos propagating through the Earth

et al. 2018

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There has been a recent surge in interest in the detection of τ lepton-induced air showers from detectors at altitude. When a τ neutrino (ντ ) enters the Earth it produces τ leptons as a result of nuclear charged current interactions. In some cases, this process results in a τ lepton exiting the surface of the Earth, which can subsequently decay in the atmosphere and produce an extensive air shower. These upward-going air showers can be detected via fluorescence, optical Cherenkov, or geomagnetic radio emission. Several experiments have been proposed to detect these signals. We present a comprehensive simulation of the production of τ leptons by ντ 's propagating through Earth to aid the design of future experiments. These simulations for ντ 's and leptons in the energy range from 10 15 eV to 10 21 eV treat the full range of incidence angles from Earth-skimming to diametrically-traversing. Propagation of ντ 's and leptons include the effects of rock and an ocean or ice layer of various thicknesses. The interaction models include ντ regeneration and account for uncertainties in the Standard Model neutrino cross-section and in the photo-nuclear contribution to the τ energy loss rate.

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“…IceCube has been to designed to detect high energy astrophysical neutrinos of extragalactic origin. Beyond neutrino energies of ∼ 20 TeV the background of atmospheric neutrinos get diminished and the neutrinos of higher energies are attributed to extragalactic sources [1].…”

Section: Introductionmentioning

confidence: 99%

Interactions of astrophysical neutrinos with dark matter: a model building perspective

Pandey

Karmakar

Rakshit

2019

J. High Energ. Phys.

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We explore the possibility that high energy astrophysical neutrinos can interact with the dark matter on their way to Earth. Keeping in mind that new physics might leave its signature at such energies, we have considered all possible topologies for effective interactions between neutrino and dark matter. Building models, that give rise to a significant flux suppression of astrophysical neutrinos at Earth, is rather difficult. We present a Z -mediated model in this context. Encompassing a large variety of models, a wide range of dark matter masses from 10 −21 eV up to a TeV, this study aims at highlighting the challenges one encounters in such a model building endeavour after satisfying various cosmological constraints, collider search limits and electroweak precision measurements. *

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The galactic contribution to IceCube's astrophysical neutrino flux

Cited by 57 publications

References 70 publications

Origin of the High-energy Neutrino Flux at IceCube

Origin of the High-energy Neutrino Flux at IceCube

Comprehensive approach to tau-lepton production by high-energy tau neutrinos propagating through the Earth

Interactions of astrophysical neutrinos with dark matter: a model building perspective

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