scholarly journals Update of a Combined Analysis of the High-Energy Cosmic Neutrino Flux at the IceCube Detector

2016 ◽  
Author(s):  
Lars Mohrmann
Keyword(s):  
Neutrino Flux ◽  
High Energy ◽  
Combined Analysis ◽  
Icecube Detector ◽  
Cosmic Neutrino

scholarly journals SEARCH FOR NEUTRINO EMISSION FROM GAMMA-RAY SOURCES WITH THE ANTARES TELESCOPE

2012 ◽  
Vol 08 ◽  
pp. 307-310
Author(s):  
C. BIGONGIARI
Keyword(s):  
Gamma Ray ◽  
Neutrino Flux ◽  
Three Dimensional ◽  
Effective Area ◽  
High Energy ◽  
Neutrino Telescope ◽  
Neutrino Detector ◽  
Upper Limits ◽  
Cosmic Neutrino ◽  
Promising Source

ANTARES is the first undersea neutrino detector ever built and presently the neutrino telescope with the largest effective area operating in the Northern Hemisphere. A three-dimensional array of photomultiplier tubes detects the Cherenkov light induced by the muons produced in the interaction of high energy neutrinos with the matter surrounding the detector. The detection of astronomical neutrino sources is one of the main goals of ANTARES. The search for point-like neutrino sources with the ANTARES telescope is described and the preliminary results obtained with data collected from 2007 to 2010 are shown. No cosmic neutrino source has been observed and neutrino flux upper limits have been calculated for the most promising source candidates.

scholarly journals Recent Results from the Antares Neutrino Telescope

2019 ◽  
Vol 207 ◽  
pp. 01001
Author(s):  
Antoine Kouchner
Keyword(s):  
Galactic Plane ◽  
Large Fraction ◽  
Neutrino Flux ◽  
High Energy ◽  
Neutrino Telescope ◽  
Point Sources ◽  
Joint Analysis ◽  
Neutrino Source ◽  
Cosmic Neutrino ◽  
The One

Antares, the first undersea neutrino telescope, has been continuously operating since 2007 in the Mediterranean Sea. The transparency of the water allows for a very good angular resolution in the reconstruction of neutrino events of all flavors. This results in an unmatched sensitivity for neutrino source searches, in a large fraction of the Southern Sky, at TeV energies. As a consequence, Antares provides valuable constraints on the origin of the cosmic neutrino flux discovered by the IceCube Collaboration. Based on an all-flavor dataset spanning nine years of operation of the detector, the latest results of Antares searches for neutrino point sources, and for diffuse neutrino emission from the entire sky as well as from several interesting regions such as the Galactic Plane, are presented. Several results have been obtained through a joint analysis with the IceCube Collaboration. Concerning the multi-messenger program, the focus is made on the follow-up searches of IceCube alerts, in particular the one related to the TXS 0506+056 blazar, thought to be the first extragalactic high-energy neutrino source identified so far.

scholarly journals Neutrino Telescopes and High-Energy Cosmic Neutrinos

Universe ◽  
2020 ◽  
Vol 6 (2) ◽  
pp. 30 ◽  
Author(s):  
Andrea Palladino ◽  
Maurizio Spurio ◽  
Francesco Vissani
Keyword(s):  
Cosmic Rays ◽  
Review Paper ◽  
High Energy ◽  
Current Status ◽  
Neutrino Telescopes ◽  
Secondary Particles ◽  
Terrestrial Atmosphere ◽  
Icecube Detector ◽  
Cosmic Neutrino ◽  
Neutrino Astrophysics

In this review paper, we present the main aspects of high-energy cosmic neutrino astrophysics. We begin by describing the generic expectations for cosmic neutrinos, including the effects of propagation from their sources to the detectors. Then we introduce the operating principles of current neutrino telescopes, and examine the main features (topologies) of the observable events. After a discussion of the main background processes, due to the concomitant presence of secondary particles produced in the terrestrial atmosphere by cosmic rays, we summarize the current status of the observations with astrophysical relevance that have been greatly contributed by IceCube detector. Then, we examine various interpretations of these findings, trying to assess the best candidate sources of cosmic neutrinos. We conclude with a brief perspective on how the field could evolve within a few years.

scholarly journals On the τ flavor of the cosmic neutrino flux

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Yasaman Farzan
Keyword(s):  
Dark Matter ◽  
Degrees Of Freedom ◽  
Neutrino Flux ◽  
High Energy ◽  
New Physics ◽  
Beyond The Standard Model ◽  
New Era ◽  
The Standard Model ◽  
Cosmic Neutrino ◽  
Standard Picture

Abstract Observation of high energy cosmic neutrinos by ICECUBE has ushered in a new era in exploring both cosmos and new physics beyond the Standard Model (SM). In the standard picture, although mostly νμ and νe are produced in the source, oscillation will produce ντen route. Certain beyond SM scenarios, like interaction with ultralight DM can alter this picture. Thus, the flavor composition of the cosmic neutrino flux can open up the possibility of exploring certain beyond the SM scenarios that are inaccessible otherwise. We show that the τ flavor holds a special place among the neutrino flavors in elucidating new physics. Interpreting the two anomalous events observed by ANITA as ντ events makes the tau flavor even more intriguing. We study how the detection of the two tau events by ICECUBE constrains the interaction of the neutrinos with ultralight dark matter and discuss the implications of this interaction for even higher energy cosmic neutrinos detectable by future radio telescopes such as ARA, ARIANNA and GRAND. We also revisit the 3 + 1 neutrino scheme as a solution to the two anomalous ANITA events and clarify a misconception that exists in the literature about the evolution of high energy neutrinos in matter within the 3 + 1 scheme with a possibility of scattering off nuclei. We show that the existing bounds on the flux of ντ with energy of EeV rules out this solution for the ANITA events. We show that the 3 + 1 solution can be saved from both this bound and from the bound on the extra relativistic degrees of freedom in the early universe by turning on the interaction of neutrinos with ultralight dark matter.

scholarly journals Differential limit on the extremely-high-energy cosmic neutrino flux in the presence of astrophysical background from nine years of IceCube data

2018 ◽  
Vol 98 (6) ◽  
Author(s):  
M. G. Aartsen ◽  
M. Ackermann ◽  
J. Adams ◽  
J. A. Aguilar ◽  
M. Ahlers ◽  
...  
Keyword(s):  
Neutrino Flux ◽  
High Energy ◽  
Cosmic Neutrino

scholarly journals Erratum: Constraints on the extremely-high energy cosmic neutrino flux with the IceCube 2008-2009 data [Phys. Rev. D83, 092003 (2011)]

2011 ◽  
Vol 84 (7) ◽  
Author(s):  
R. Abbasi ◽  
Y. Abdou ◽  
T. Abu-Zayyad ◽  
J. Adams ◽  
J. A. Aguilar ◽  
...  
Keyword(s):  
Neutrino Flux ◽  
High Energy ◽  
Cosmic Neutrino

scholarly journals AMBIGUITY IN SOURCE FLUX OF COSMIC/ASTROPHYSICAL NEUTRINOS: EFFECTS OF BI-MAXIMAL MIXING AND QUANTUM-GRAVITY INDUCED DECOHERENCE

2001 ◽  
Vol 16 (14) ◽  
pp. 917-925 ◽  
Author(s):  
D. V. AHLUWALIA
Keyword(s):  
Quantum Gravity ◽  
Neutrino Oscillations ◽  
Neutrino Flux ◽  
High Energy ◽  
Length Scale ◽  
Neutrino Detectors ◽  
Astrophysical Neutrinos ◽  
Cosmic Neutrino ◽  
Existing Data ◽  
Good Flavor

For high energy cosmic neutrinos Athar, Jeźabek, and Yasuda (AJY) have recently shown that the existing data on neutrino oscillations suggest that cosmic neutrino flux at the AGN/GRB source, F(νe):F(νμ):F(ντ) ≈ 1:2:0, oscillates to F(νe):F(νμ):F(ντ) ≈ 1:1:1. These results can be confirmed at AMANDA, Baikal, ANTARES and NESTOR, and other neutrino detectors with a good flavor resolution. Here, we rederive the AJY result from quasi bi-maximal mixing, and show that observation of F(νe):F(νμ):F(ντ) ≈ 1:1:1 does not necessarily establish cosmic neutrino flux at the AGN/GRB source to be F(νe):F(νμ):F(ντ) ≈ 1:2:0. We also note that if the length scale for the quantum-gravity induced decoherence for astrophysical neutrinos is of the order of a Mpc, then independent of the MNS matrix, the Liu–Hu–Ge (LHG) mechanism would lead to flux equalization for the cosmic/astrophysical neutrinos.

scholarly journals Eddington bias for cosmic neutrino sources

2019 ◽  
Vol 622 ◽  
pp. L9 ◽  
Author(s):  
Nora Linn Strotjohann ◽  
Marek Kowalski ◽  
Anna Franckowiak
Keyword(s):  
Neutrino Flux ◽  
High Energy ◽  
Emission Scenarios ◽  
The Past ◽  
Neutrino Event ◽  
Cosmic Neutrino ◽  
High Energy Neutrinos ◽  
Neutrino Fluxes ◽  
Astrophysical Neutrino

We describe a consequence of the Eddington bias which occurs when a single astrophysical neutrino event is used to infer the neutrino flux of the source. A trial factor is introduced by the potentially large number of similar sources that remain undetected; if this factor is not accounted for the luminosity of the observed source can be overestimated by several orders of magnitude. Based on the resulting unrealistically high neutrino fluxes, associations between high-energy neutrinos and potential counterparts or emission scenarios were rejected in the past. Correcting for the bias might justify a reevaluation of these cases.

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