Effects of sterile neutrinos on the ultrahigh-energy cosmic neutrino flux

Keränen, P.; Maalampi, J.; Myyryläinen, M.; Riittinen, J.

doi:10.1016/j.physletb.2003.09.006

Cited by 64 publications

(52 citation statements)

References 28 publications

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“…In discussing physics beyond the Standard Model scenario one has to incorporate these measured parameters in the analysis pertaining to oscillations involving sterile neutrinos. Models involving one (3+1), two (3+2) and three (3+3) [43,51,[54][55][56][57][58][59][60] sterile neutrinos have been proposed to explain the discussed discrepancies where many simple parametrization of the matrix U have been used [56,61].…”

Section: The Mixing Matrixmentioning

confidence: 99%

Detection of ultra-high-energy neutrinos by IceCube: sterile neutrino scenario

2014

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The short-baseline neutrino oscillation experiments, the excess of radiation from the measurement of the cosmic microwave background radiation, the necessity of the nonbaryonic dark matter candidate, and the depletion of the neutrino flux in IceCube all seem to hint at new physics beyond the standard model. An economical way to address these issues is to invoke the existence of sterile neutrinos. We present simple extensions of the standard model with additionally three sterile neutrinos and discuss the corresponding PMNS like neutrino flavor mixing matrix. The noteworthy features of the sterile neutrino scenario advocated here are that the lightest one is almost degenerate with one of the active neutrinos, the second sterile has mass of order eV, and the heaviest one is in the keV range. In the present scenario, the short-baseline anomaly is explained through m 2 ∼ 1 eV 2 , the depletion of the muon neutrino flux in IceCube is explained through m 2 ∼ 4.0 × 10 −16 eV 2 , and the dark matter problem is addressed through m 2 ∼ 1 keV 2 . Our proposed mixing matrix is also compatible with the observed neutrino oscillation data. We show that the highenergy muon and the tau neutrino fluxes from Gamma Ray Bursts can be depleted in IceCube by as much as 38 and 43 %, respectively. These substantial depletions in both muon and tau neutrino fluxes are due to their small but sizable mixing with the sterile neutrinos.

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Section: The Mixing Matrixmentioning

confidence: 99%

Detection of ultra-high-energy neutrinos by IceCube: sterile neutrino scenario

2014

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“…With the use of the correct expressions (18), (19), (20) and (21) for the decay spectra one obtains the result that even for a pure pion source the flavor ratio is not exactly two, and is in general a function of the ν energy determined by the shape of the neutrino spectrum.…”

Section: Energy Spectra In Weak Decaysmentioning

confidence: 99%

Flavor composition and energy spectrum of astrophysical neutrinos

2007

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The measurement of the flavor composition of the neutrino fluxes from astrophysical sources has been proposed as a method to study not only the nature of their emission mechanisms, but also the neutrino fundamental properties. It is however problematic to reconcile these two goals, since a sufficiently accurate understanding of the neutrino fluxes at the source is needed to extract information about the physics of neutrino propagation. In this work we discuss critically the expectations for the flavor composition and energy spectrum from different types of astrophysical sources, and comment on the theoretical uncertainties connected to our limited knowledge of their structure.

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“…This makes them ideal to constrain the pseudo-Dirac neutrino scenario. It has been studied in the general context of neutrino telescopes [70][71][72], but also for certain astrophysical sources such as GRBs [73,137,138]. Neutrinos might be Dirac or Majorana particles, depending on the allowed mass terms in the SM Lagrangian.…”

Section: A Pseudo-dirac Neutrinosmentioning

confidence: 99%

“…Decaying dark matter can also lead to a specific flavor composition due to a resonant behavior in the DM annihilation cross section into neutrinos [59,60]. Interactions with the cosmic neutrino background [61][62][63] or nonstandard interactions [64][65][66][67] may change the composition, and sterile neutrinos may affect it as well, whether they have eV mass [68,69] or similar mass as the active neutrinos (pseudo-Dirac limit) [70][71][72][73]. Lorentz and CPT violation are other BSM effects that can affect the neutrino flavor [74][75][76][77][78][79][80][81][82][83][84][85], just as neutrino decays [86][87][88][89][90].…”

Section: Introductionmentioning

confidence: 99%

Astrophysical neutrinos flavored with beyond the Standard Model physics

Rasmussen¹,

Lechner

Ackermann³

et al. 2017

Phys. Rev. D

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We systematically study the allowed parameter space for the flavor composition of astrophysical neutrinos measured at Earth, including beyond the Standard Model theories at production, during propagation, and at detection. One motivation is to illustrate the discrimination power of the nextgeneration neutrino telescopes such as IceCube-Gen2. We identify several examples that lead to potential deviations from the standard neutrino mixing expectation such as significant sterile neutrino production at the source, effective operators modifying the neutrino propagation at high energies, dark matter interactions in neutrino propagation, or nonstandard interactions in Earth matter. IceCube-Gen2 can exclude about 90% of the allowed parameter space in these cases, and hence will allow us to efficiently test and discriminate between models. More detailed information can be obtained from additional observables such as the energy dependence of the effect, fraction of electron antineutrinos at the Glashow resonance, or number of tau neutrino events.

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Effects of sterile neutrinos on the ultrahigh-energy cosmic neutrino flux

Cited by 64 publications

References 28 publications

Detection of ultra-high-energy neutrinos by IceCube: sterile neutrino scenario

Detection of ultra-high-energy neutrinos by IceCube: sterile neutrino scenario

Flavor composition and energy spectrum of astrophysical neutrinos

Astrophysical neutrinos flavored with beyond the Standard Model physics

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