Atmospheric neutrino event rates: the expectations

1994 ◽  
Vol 346 (1678) ◽  
pp. 75-84 ◽  
Keyword(s):  
Precise Measurement ◽  
Neutrino Oscillations ◽  
Detection Efficiency ◽  
Atmospheric Neutrino ◽  
Neutrino Flux ◽  
New Physics ◽  
Naturally Occurring ◽  
Deep Underground ◽  
Many Sources ◽  
Event Rates

Naturally occurring energetic neutrinos produced by interactions of cosmic rays in the atmosphere produce a signal in deep underground detectors which is a convolution of neutrino flux, neutrino cross section and detection efficiency. The predicted ratio of events induced by v e as compared to v μ is relatively robust (because many sources of uncertainty cancel in the ratio), but it differs significantly from what is observed. Interpretations that involve new physics (e.g. neutrino oscillations or nucleon decay) have been proposed. One interpretation in terms of neutrino oscillations would imply a low value of neutrino-induced upward muons. Although there is no strong evidence for such a deficit, uncertainties in calculating the expected absolute rate prevent one from eliminating this interpretation at present. Precise measurement of muon fluxes at high altitude, as well as calibration of detectors with neutrino beams from accelerators, will help clarify the situation.

scholarly journals Determination of the atmospheric neutrino flux and searches for new physics with AMANDA-II

2009 ◽  
Vol 79 (10) ◽  
Author(s):  
R. Abbasi ◽  
Y. Abdou ◽  
M. Ackermann ◽  
J. Adams ◽  
M. Ahlers ◽  
...  
Keyword(s):  
Atmospheric Neutrino ◽  
Neutrino Flux ◽  
New Physics

scholarly journals Atmospheric neutrino oscillations and new physics

2004 ◽  
Vol 70 (3) ◽  
Author(s):  
M. C. Gonzalez-Garcia ◽  
Michele Maltoni
Keyword(s):  
Neutrino Oscillations ◽  
Atmospheric Neutrino ◽  
New Physics

scholarly journals AN EXPERIMENTALIST'S VIEW OF NEUTRINO OSCILLATIONS

2001 ◽  
Vol 16 (25) ◽  
pp. 4085-4151 ◽  
Author(s):  
ANTONELLA DE SANTO
Keyword(s):  
High Energy Physics ◽  
Neutrino Oscillations ◽  
Atmospheric Neutrino ◽  
High Energy ◽  
New Physics ◽  
Beyond The Standard Model ◽  
Compelling Evidence ◽  
The Past ◽  
The Standard Model ◽  
Energy Physics

Neutrinos, and primarily neutrino oscillations, have undoubtedly been one of the most exciting topics in the field of high-energy physics over the past few years. The existence of neutrino oscillations would require an extension of the currently accepted description of sub-nuclear phenomena beyond the Standard Model. Compelling evidence of new physics, which seems to be pointing towards neutrino oscillations, is coming from the solar neutrino deficit and from the atmospheric neutrino anomaly. More controversial effects have been observed with artificially produced neutrinos. The present experimental status of neutrino oscillations is reviewed, as well as the planned future experimental programme, which, it is hoped, will solve most of the outstanding puzzles.

scholarly journals CAN THE SUPER-KAMIOKANDE ATMOSPHERIC DATA PREDICT THE SOLAR NEUTRINO DEFICIT?

1999 ◽  
Vol 14 (10n11) ◽  
pp. 689-700 ◽  
Author(s):  
ION STANCU
Keyword(s):  
Solar Neutrino ◽  
Neutrino Oscillations ◽  
Atmospheric Neutrino ◽  
Neutrino Flux ◽  
Experimental Results ◽  
Neutrino Mixing ◽  
Mixing Angles ◽  
Atmospheric Data ◽  
Mixing Matrix ◽  
Good Agreement

In this letter we show that the evidence for neutrino oscillations from the super-Kamiokande atmospheric neutrino data fully determines the 3×3 neutrino-oscillations mixing matrix and predicts an energy-independent solar neutrino deficit at the level of 45%. This corresponds to a ratio of measured to predicted neutrino flux of [Formula: see text], in good agreement with the experimental results. We achieve this result within the framework of a minimal, three-generation neutrino mixing, with mass squared differences of ΔM2≃0.45 eV 2 and [Formula: see text]. The mixing matrix derived here is characterized by the mixing angles θ=35.1°, β=5.5° and ψ=23.3°, and a vanishing CP-violating phase, δ=0.

Neutrino Oscillations and the Anomalous Atmospheric Neutrino Flux

1988 ◽  
Vol 61 (14) ◽  
pp. 1537-1540 ◽  
Author(s):  
K. Hidaka ◽  
M. Honda ◽  
S. Midorikawa
Keyword(s):  
Neutrino Oscillations ◽  
Atmospheric Neutrino ◽  
Neutrino Flux

scholarly journals NEUTRINO OSCILLATIONS AND THE EXACT PARITY MODEL

1994 ◽  
Vol 09 (02) ◽  
pp. 169-179 ◽  
Author(s):  
R. FOOT
Keyword(s):  
Neutrino Mass ◽  
General Result ◽  
Neutrino Oscillations ◽  
Mass Matrix ◽  
Atmospheric Neutrino ◽  
Solar Neutrinos ◽  
Specific Model ◽  
Neutrino Mixing ◽  
Mixing Angles ◽  
Significant Deficit

We re-examine neutrino oscillations in exact parity models. Previously it was shown in a specific model that large neutrino mixing angles result. We show here that this is a general result of neutrino mixing in exact parity models provided that the neutrino mass matrix is real. In this case, the effects of neutrino mixing in exact parity models is such that the probability of a given weak eigenstate remaining in that eigenstate averages to less than half when averaged over many oscillations. This result is interesting in view of the accumulating evidence for a significant deficit in the number of solar neutrinos. It may also be of relevance to the atmospheric neutrino anomaly.

Neutrino oscillations and the atmospheric neutrino fluxes

1984 ◽  
Vol 30 (1) ◽  
pp. 80-88 ◽  
Author(s):  
G. V. Dass ◽  
K. V. L. Sarma
Keyword(s):  
Neutrino Oscillations ◽  
Atmospheric Neutrino ◽  
Neutrino Fluxes

scholarly journals ULTRAHIGH ENERGY NEUTRINOS

2003 ◽  
Vol 18 (22) ◽  
pp. 4085-4096 ◽  
Author(s):  
SHARADA IYER DUTTA ◽  
MARY HALL RENO ◽  
INA SARCEVIC
Keyword(s):  
Black Hole ◽  
Standard Model ◽  
Cross Section ◽  
Neutrino Oscillations ◽  
Ultrahigh Energy ◽  
Nonstandard Model ◽  
Air Shower ◽  
Energy Neutrino ◽  
The Standard Model ◽  
Event Rates

The ultrahigh energy neutrino cross section is well understood in the standard model for neutrino energies up to 1012 GeV, Tests of neutrino oscillations (νμ ↔ ντ) from extragalactic sources of neutrinos are possible with large underground detectors. Measurements of horizontal air shower event rates at neutrino energies above 1010 GeV will be able to constrain nonstandard model contributions to the neutrino-nucleon cross section, e.g., from mini-black hole production.

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