scholarly journals Tau neutrinos in IceCube, KM3NeT and the Pierre Auger Observatory

2019 ◽  
Author(s):  
Daan van Eijk
Keyword(s):  
Neutrino Physics ◽  
Atmospheric Neutrino ◽  
High Energy ◽  
Pierre Auger Observatory ◽  
Detection Mechanism ◽  
Neutrino Detectors ◽  
Tau Neutrino ◽  
Tau Neutrinos ◽  
Physics Potential ◽  
Astrophysical Neutrinos

In 2018, the IceCube collaboration reported evidence for the identification of a blazar as an astrophysical neutrino source. That evidence is briefly summarised here before focusing on the prospects of tau neutrino physics in IceCube, both at high energies (astrophysical neutrinos) and at lower energies (atmospheric neutrino oscillations). In addition, future neutrino detectors such as KM3NeT and the IceCube Upgrade and their tau neutrino physics potential are discussed. Finally, the detection mechanism for high-energy (tau) neutrinos in the Pierre Auger Observatory and the resulting flux upper limits are presented.

scholarly journals Study of Tau Neutrino Production in Proton Nucleus Interactions

2019 ◽  
Vol 64 (7) ◽  
pp. 577
Author(s):  
Yu. Gornushkin
Keyword(s):  
High Resolution ◽  
Cross Section ◽  
High Energy ◽  
High Energy Proton ◽  
Tau Neutrino ◽  
Neutrino Production ◽  
Tau Neutrinos ◽  
Energy Proton ◽  
First Results ◽  
Particle Decays

In the DsTau experiment at the CERN SPS, an independent direct way to study the tau neutrino production in high energy proton-nucleous interactions was proposed. Since the main source of tau neutrinos is a decay of Ds mesons, the project aims at measuring the differential cross-section of this reaction. The experimental method is based on the use of high-resolution emulsion detectors for the efficient registration of events with short-lived particle decays. The motivation of the project, details of the experimental technique, and the first results of the analysis of the data collected during test runs, which prove the feasibility of the study are presented.

scholarly journals LIMIT ON UHE NEUTRINO FLUXES FROM THE PIERRE AUGER OBSERVATORY

2013 ◽  
Vol 53 (A) ◽  
pp. 756-759
Author(s):  
S. Maldera
Keyword(s):  
Point Source ◽  
High Energy ◽  
Time Structure ◽  
Pierre Auger Observatory ◽  
Tau Leptons ◽  
Ultra High Energy ◽  
Tau Neutrinos ◽  
Surface Detector ◽  
Recorded Data ◽  
Neutrino Fluxes

The surface detector of the Pierre Auger Observatory is sensitive to Ultra High Energy (UHE) neutrinos. Neutrinos of all flavors can interact in the atmosphere producing inclined showers near the ground. Moreover, ultra high energy Earth-skimming tau neutrinos can be observed through the detection of showers induced by the decay of tau leptons created by interactions in the Earth’s crust. In both cases, neutrino showers can be identified through the time structure of the signals in the surface detector stations. Two sets of identification criteria have been designed to search for down-going and up-going neutrinos in the recorded data, with no candidates found. We will discuss the identification criteria used, and we will present the corresponding limits on the diffuse and point source neutrino fluxes.

scholarly journals Constraints on the Nonstandard Interaction in Propagation from Atmospheric Neutrinos

2015 ◽  
Vol 2015 ◽  
pp. 1-13 ◽  
Author(s):  
Shinya Fukasawa ◽  
Osamu Yasuda
Keyword(s):  
Atmospheric Neutrino ◽  
High Energy ◽  
Atmospheric Neutrinos ◽  
Tau Neutrino ◽  
Rate Analysis ◽  
High Energy Behavior ◽  
Energy Behavior ◽  
Matter Effect ◽  
Neutrino Experiments ◽  
Dependent Interaction

The sensitivity of the atmospheric neutrino experiments to the nonstandard flavor-dependent interaction in neutrino propagation is studied under the assumption that only nonvanishing components of the nonstandard matter effect are the electron and tau neutrino componentsϵee, andϵeτ,ϵττand that the tau-tau component satisfies the constraintϵττ=|ϵeτ|2/(1+ϵee)which is suggested from the high energy behavior for atmospheric neutrino data. It is shown that the Super-Kamiokande (SK) data for 4438 days constrains|tanβ|≡|ϵeτ/(1+ϵee)|≲0.8at 2.5σ(98.8%) CL whereas the future Hyper-Kamiokande experiment for the same period of time as SK will constrain as|tanβ|≲0.3at 2.5σCL from the energy rate analysis and the energy spectrum analysis will give even tighter bounds onϵeeand|ϵeτ|.

scholarly journals ULTRAHIGH ENERGY TAU NEUTRINOS

2005 ◽  
Vol 20 (19) ◽  
pp. 4656-4663 ◽  
Author(s):  
J. JONES ◽  
I. MOCIOIU ◽  
I. SARCEVIC ◽  
M. H. RENO
Keyword(s):  
Energy Loss ◽  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
The Other ◽  
Ultrahigh Energy ◽  
Tau Neutrino ◽  
Tau Neutrinos ◽  
The Earth ◽  
Astrophysical Neutrinos ◽  
Neutrino Fluxes

We study ultrahigh energy astrophysical neutrinos and the contribution of tau neutrinos from neutrino oscillations, relative to the contribution of the other flavors. We show the effect of tau neutrino regeneration and tau energy loss as they propagate through the Earth. We consider a variety of neutrino fluxes, such as cosmogenic neutrinos and neutrinos that originate in Active Galactic Nuclei. We discuss signals of tau neutrinos in detectors such as IceCube, RICE and ANITA.

scholarly journals A New Concept for High-Elevation Radio Detection of Tau Neutrinos

2019 ◽  
Vol 216 ◽  
pp. 04007 ◽  
Author(s):  
Stephanie Wissel ◽  
Jaime Alvarez-Muñiz ◽  
Washington R. Carvalho ◽  
Andrés Romero-Wolf ◽  
Harm Schoorlemmer ◽  
...  
Keyword(s):  
Antenna Arrays ◽  
High Elevation ◽  
Tau Lepton ◽  
Tau Neutrino ◽  
Phased Antenna Arrays ◽  
Tau Neutrinos ◽  
Astrophysical Neutrinos ◽  
Flavor Mixing ◽  
Lepton Decay ◽  
Significant Flux

Cosmic neutrinos are expected to include a significant flux of tau neutrinos due to flavor mixing over astronomical length scales. However, the tau-neutrino content of astrophysical neutrinos is poorly constrained and a significant flux of cosmogenic tau neutrinos awaits discovery. Earth-skimming tau neutrinos undergo charged-current interactions that result in a tau lepton exiting the Earth. The tau lepton decay generates anextensive air shower and geomagnetic radio emission. To target the tau neutrinos, we present a new tau neutrino detector concept that uses phased antenna arrays placed on high elevation mountains. Simulation studies indicate that a modest array size and small number of stations can achieve competitive sensitivity, provided the receivers are at highs enough elevation.

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 TRACING VERY HIGH ENERGY TAU NEUTRINOS FROM COSMOLOGICAL SOURCES IN ICE

2005 ◽  
Vol 20 (06) ◽  
pp. 1204-1211 ◽  
Author(s):  
J. JONES ◽  
I. MOCIOIU ◽  
I. SARCEVIC ◽  
M. H. RENO
Keyword(s):  
High Energy ◽  
Ultrahigh Energy ◽  
Tau Neutrino ◽  
Tau Neutrinos ◽  
The Earth ◽  
Very High Energy ◽  
Charged Leptons ◽  
Neutrino Fluxes ◽  
In Transit ◽  
Very High

Astrophysical sources of ultrahigh energy neutrinos yield tau neutrino fluxes due to neutrino oscillations. We study in detail the contribution of tau neutrinos with energies above 106 GeV relative to the contribution of the other flavors. We consider several different initial neutrino fluxes and include tau neutrino regeneration in transit through the Earth and energy loss of charged leptons. We discuss signals of tau neutrinos in detectors such as IceCube, RICE and ANITA.

ENERGY ORDERING EFFECTS IN THE ARRIVAL DIRECTIONS OF ULTRA-HIGH ENERGY COSMIC RAYS MEASURED BY THE PIERRE AUGER OBSERVATORY

2011 ◽  
Vol 20 (supp02) ◽  
pp. 50-56
Author(s):  
◽  
PETER SCHIFFER
Keyword(s):  
Cosmic Rays ◽  
Magnetic Fields ◽  
Charged Particles ◽  
High Energy ◽  
Pierre Auger Observatory ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
Ordering Effects ◽  
Arrival Directions

The Pierre Auger Observatory is the world's largest experiment for the measurement of ultra-high energy cosmic rays (UHECRs). These UHECRs are assumed to be to be charged particles, and thus are deflected in cosmic magnetic fields. Recent results of the Pierre Auger Observatory addressing the complex of energy ordering of the UHECRs arrival directions are reviewed in this contribution. So far no significant energy ordering has been observed.

scholarly journals Neutrino Astronomy with IceCube

2016 ◽  
Vol 12 (S324) ◽  
pp. 322-329
Author(s):  
Kevin J. Meagher
Keyword(s):  
Real Time ◽  
Gamma Ray ◽  
Galactic Plane ◽  
Galactic Nuclei ◽  
High Energy ◽  
Glacial Ice ◽  
Astrophysical Neutrinos ◽  
Charged Secondary ◽  
Neutrino Astronomy ◽  
The Antarctic

AbstractThe IceCube Neutrino Observatory is a cubic kilometer neutrino telescope located at the Geographic South Pole. Cherenkov radiation emitted by charged secondary particles from neutrino interactions is observed by IceCube using an array of 5160 photomultiplier tubes embedded between a depth of 1.5 km to 2.5 km in the Antarctic glacial ice. The detection of astrophysical neutrinos is a primary goal of IceCube and has now been realized with the discovery of a diffuse, high-energy flux consisting of neutrino events from tens of TeV up to several PeV. Many analyses have been performed to identify the source of these neutrinos: correlations with active galactic nuclei, gamma-ray bursts, and the galactic plane. IceCube also conducts multi-messenger campaigns to alert other observatories of possible neutrino transients in real-time. However, the source of these neutrinos remains elusive as no corresponding electromagnetic counterparts have been identified. This proceeding will give an overview of the detection principles of IceCube, the properties of the observed astrophysical neutrinos, the search for corresponding sources (including real-time searches), and plans for a next-generation neutrino detector, IceCube–Gen2.

Sign in / Sign up

Export Citation Format

Share Document