New constraints on the origin of medium-energy neutrinos observed by IceCube

Capanema, Antonio; Esmaili, Arman; Murase, Kohta

doi:10.1103/physrevd.101.103012

Cited by 50 publications

(49 citation statements)

References 76 publications

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“…General constraints on the power density of neutrino sources can be derived from the standard phenomenological picture. For example, the Waxman Bahcall bound [56] connects the average production rate of ultrahigh-energy cosmic rays to that of high energy neutrinos, and the observations of the diffuse extra-Galactic gammaray background by the Fermi-LAT instrument [57] constrain the spectral index of the neutrino emission [58,59]. Moving away from a more model-independent view, our framework can also be applied to a specific source scenario in order to investigate the implications in detail.…”

Section: Discussionmentioning

confidence: 99%

Bayesian constraints on the astrophysical neutrino source population from IceCube data

2020

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We present constraints on an astrophysical population of neutrino sources imposed by recent data from the IceCube neutrino observatory. By using the IceCube point source search method to model the detection of sources, our detection criterion is more sensitive than using the observation of high-energy neutrino multiplets for source identification. We frame the problem as a Bayesian hierarchical model to connect the high-level population parameters to the IceCube data, allowing us to consistently account for all relevant sources of uncertainty in our model assumptions. Our results show that sources with a local density of n 0 ≳ 10 −7 Mpc −3 and luminosity L ≲ 10 43 erg s −1 are the most likely candidates, but that populations of rare sources with n 0 ≃ 10 −9 Mpc −3 and L ≃ 10 45 erg s −1 can still be consistent with the IceCube observations. We demonstrate that these conclusions are strongly dependent on the source evolution considered, for which we consider a wide range of models. In doing so, we present realistic, modelindependent constraints on the population parameters that reflect our current state of knowledge from astrophysical neutrino observations. We also use our framework to investigate constraints in the case of possible source detections and future instrument upgrades. Our approach is flexible and can be used to model specific source cases and extended to include multimessenger information.

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Section: Discussionmentioning

confidence: 99%

Bayesian constraints on the astrophysical neutrino source population from IceCube data

2020

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“…In this chapter, we will present all the results obtained in this thesis, which can also be found in [79]. First, our main χ 2 analysis results are shown in Section 5.1, followed by our complementary analysis results in Section 5.2.…”

Section: Resultsmentioning

confidence: 97%

“…The results presented in this work have been published in [79] and complemented in [80]. Here, we will focus on further describing the theoretical background, analysis methodology and results obtained in [79], without extending our discussion to the latter paper.…”

Section: Objectivesmentioning

confidence: 99%

“…A clear tension can be seen between neutrino and γ-ray data in the Cascade s h range. Figure reproduced from [79]. Figure 5.2 Neutrino (black lines), cascaded (red lines) and total (conventional + cascaded, blue lines) γ-ray fluxes for specific (ε br , s h ) values, compared with the IceCube allowed regions for each dataset (black dashed lines) and the Fermi EGB data (red data points).…”

Section: Table Of Contentsmentioning

confidence: 99%

“…A clear tension can be seen between neutrino and γ-ray data in the Cascade s h range. Figure reproduced from[79].…”

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confidence: 99%

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Cascaded Gamma-Ray Counterpart of the Icecube Neutrinos

GALVAO¹

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Present and future constraints on flavor-dependent long-range interactions of high-energy astrophysical neutrinos

Agarwalla,

Bustamante,

Das

et al. 2023

J. High Energ. Phys.

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The discovery of new, flavor-dependent neutrino interactions would provide compelling evidence of physics beyond the Standard Model. We focus on interactions generated by the anomaly-free, gauged, abelian lepton-number symmetries, specifically Le – Lμ, Le – Lτ , and Lμ – Lτ , that introduce a new matter potential sourced by electrons and neutrons, potentially impacting neutrino flavor oscillations. We revisit, revamp, and improve the constraints on these interactions that can be placed via the flavor composition of the diffuse flux of high-energy astrophysical neutrinos, with TeV–PeV energies, i.e., the proportion of νe, νμ, and ντ in the flux. Because we consider mediators of these new interactions to be ultra-light, lighter than 10−10 eV, the interaction range is ultra-long, from km to Gpc, allowing vast numbers of electrons and neutrons in celestial bodies and the cosmological matter distribution to contribute to this new potential. We leverage the present-day and future sensitivity of high-energy neutrino telescopes and of oscillation experiments to estimate the constraints that could be placed on the coupling strength of these interactions. We find that, already today, the IceCube neutrino telescope demonstrates potential to constrain flavor-dependent long-range interactions significantly better than existing constraints, motivating further analysis. We also estimate the improvement in the sensitivity due to the next-generation neutrino telescopes such as IceCube-Gen2, Baikal-GVD, KM3NeT, P-ONE, and TAMBO.

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New constraints on the origin of medium-energy neutrinos observed by IceCube

Cited by 50 publications

References 76 publications

Bayesian constraints on the astrophysical neutrino source population from IceCube data

Bayesian constraints on the astrophysical neutrino source population from IceCube data

Cascaded Gamma-Ray Counterpart of the Icecube Neutrinos

Present and future constraints on flavor-dependent long-range interactions of high-energy astrophysical neutrinos

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