scholarly journals End of the cosmic neutrino energy spectrum

2014 ◽  
Vol 739 ◽  
pp. 99-101 ◽  
Author(s):  
L.A. Anchordoqui ◽  
V. Barger ◽  
H. Goldberg ◽  
J.G. Learned ◽  
D. Marfatia ◽  
...  
Keyword(s):  
Energy Spectrum ◽  
Neutrino Energy ◽  
Cosmic Neutrino

NEW RESULTS FROM THE K2K EXPERIMENT

2005 ◽  
Vol 20 (14) ◽  
pp. 3055-3058
Author(s):  
◽  
RICHARD GRAN
Keyword(s):  
Energy Spectrum ◽  
Neutrino Oscillation ◽  
Neutrino Energy ◽  
Long Baseline ◽  
Neutrino Oscillation Experiment ◽  
Total Data ◽  
Oscillation Experiment

The K2K long-baseline neutrino oscillation experiment has analyzed all data including the period ending in February 2004. The total data sample is from 8.9 × 1019 protons on target. We observe 108 events at the far detector, Super-Kamiokande, when 150.9 + 11.6 - 10.0 were expected. Further, we observe a distortion of the neutrino energy spectrum which is consistent with νμ to ντ oscillation. The probability that we would observe these results if there is no neutrino oscillation is 0.011%, a 3.9 σ significance.

scholarly journals Measurement of the atmospheric neutrino energy spectrum from 100 GeV to 400 TeV with IceCube

2011 ◽  
Vol 83 (1) ◽  
Author(s):  
R. Abbasi ◽  
Y. Abdou ◽  
T. Abu-Zayyad ◽  
J. Adams ◽  
J. A. Aguilar ◽  
...  
Keyword(s):  
Energy Spectrum ◽  
Atmospheric Neutrino ◽  
Neutrino Energy

scholarly journals Measurement of the Solar Neutrino Energy Spectrum Using Neutrino-Electron Scattering

1999 ◽  
Vol 82 (12) ◽  
pp. 2430-2434 ◽  
Author(s):  
Y. Fukuda ◽  
T. Hayakawa ◽  
E. Ichihara ◽  
K. Inoue ◽  
K. Ishihara ◽  
...  
Keyword(s):  
Energy Spectrum ◽  
Electron Scattering ◽  
Solar Neutrino ◽  
Neutrino Energy

scholarly journals Characterization of the PeV astrophysical neutrino energy spectrum using down-going tracks

2021 ◽  
Author(s):  
Yang Lyu ◽  
Rasha Abbasi ◽  
Markus Ackermann ◽  
Jenni Adams ◽  
Juanan Aguilar ◽  
...  
Keyword(s):  
Energy Spectrum ◽  
Neutrino Energy ◽  
Astrophysical Neutrino

scholarly journals Do hep neutrinos affect the solar neutrino energy spectrum?

1998 ◽  
Vol 436 (3-4) ◽  
pp. 243-250 ◽  
Author(s):  
John N. Bahcall ◽  
Plamen I. Krastev
Keyword(s):  
Energy Spectrum ◽  
Solar Neutrino ◽  
Neutrino Energy

scholarly journals Retrieval of energy spectra for all flavours of neutrinos from core-collapse supernova with multiple detectors

2020 ◽  
Vol 500 (1) ◽  
pp. 319-332
Author(s):  
Hiroki Nagakura
Keyword(s):  
Energy Spectrum ◽  
Three Dimensional ◽  
Large Error ◽  
Neutrino Energy ◽  
Energy Spectra ◽  
Joint Analysis ◽  
Core Collapse ◽  
Neutrino Experiment ◽  
Core Collapse Supernova ◽  
Reaction Channels

ABSTRACT We present a new method by which to retrieve energy spectrum for all falvours of neutrinos from core-collapse supernova (CCSN). In the retrieval process, we do not assume any analytic formulas to express the energy spectrum of neutrinos but rather take a direct way of spectrum reconstruction from the observed data; the singular value decomposition algorithm with a newly developed adaptive energy-gridding technique is adopted. We employ three independent reaction channels having different flavour sensitivity to neutrinos. Two reaction channels, inverse beta decay on proton and elastic scattering on electrons, from a water Cherenkov detector such as Super-Kamiokande (SK) and Hyper-Kamiokande (HK), and a charged current reaction channel with Argon from the Deep Underground Neutrino Experiment (DUNE) are adopted. Given neutrino oscillation models, we iteratively search the neutrino energy spectra at the CCSN source until they provide the consistent event counts in the three reaction channels. We test the capability of our method by demonstrating the spectrum retrieval to a theoretical neutrino data computed by our recent three-dimensional CCSN simulation. Although the energy spectrum with either electron-type or electron-type antineutrinos at the CCSN source has relatively large error compared to that of other species, the joint analysis with HK + DUNE or SK + DUNE will provide precise energy spectrum of all flavours of neutrinos at the source. Finally, we discuss perspectives for improvements of our method by using neutrino data of other detectors.

scholarly journals Analysis of the reactor antineutrino spectrum anomaly with fuel burnup

2020 ◽  
Vol 239 ◽  
pp. 02005
Author(s):  
Le Yang ◽  
Xubo Ma ◽  
Runze Zhu ◽  
Yaozhou Li ◽  
Zifeng Huang
Keyword(s):  
Energy Spectrum ◽  
Energy Region ◽  
Accurate Method ◽  
Neutrino Energy ◽  
Point Of View ◽  
Neutrino Mixing ◽  
Mixing Angle ◽  
Double Chooz ◽  
Equilibrium Correction ◽  
Non Equilibrium

Recently, three successful antineutrino experiments (Daya Bay, Double Chooz, and RENO) measured the neutrino mixing angle θ13; however, significant discrepancies were found, both in the absolute flux and spectral shape. Much effort has been expended investigating the possible reasons for the discrepancies. In this paper, the change of neutrino energy spectrum with burnup is analyzed from the point of view of the change of neutrino energy spectrum with burnup. An accurate method for calculating neutrino energy spectrum is proposed. The non-equilibrium correction is studied by using this method. It is found that the non-equilibrium correction contributes not only to the energy region less than 4.0 MeV, but also to the energy region greater than 4.0 MeV, with a maximum correction of about 3%.

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