scholarly journals Geometric speed limit of neutrino oscillation

2021 ◽  
Vol 20 (5) ◽  
Author(s):  
Fazeel Khan ◽  
Jerzy Dajka
Keyword(s):  
Neutrino Oscillation ◽  
Neutrino Oscillations ◽  
Unperturbed System ◽  
Speed Limit ◽  
Normal Matter

AbstractWe investigate geometric quantum speed limit of neutrino oscillations in a presence of matter and CP-violation. We show that periodicity in the speed limit present in an unperturbed system becomes damped by interaction with a normal matter and decoherence. We also show that (hypothetical) CP-violation causes enhancement of periodicity and increases amplitude of an oscillating quantum speed limit and can quantify CP-violation.

scholarly journals Appearance–disappearance relation in 3 + Ns short-baseline neutrino oscillations

2016 ◽  
Vol 31 (01) ◽  
pp. 1650003 ◽  
Author(s):  
C. Giunti ◽  
E. M. Zavanin
Keyword(s):  
Neutrino Oscillation ◽  
Neutrino Oscillations ◽  
Neutrino Mixing ◽  
Short Baseline ◽  
Mixing Schemes ◽  
Existing Data

We derive the relation between the amplitudes of short-baseline appearance and disappearance oscillations in [Formula: see text] neutrino mixing schemes which is the origin of the appearance–disappearance tension that is found from the analysis of the existing data in any [Formula: see text] neutrino mixing scheme. We illustrate the power of the relation to reveal the appearance–disappearance tension in the cases of [Formula: see text] and [Formula: see text] mixing using the results of global fits of short-baseline neutrino oscillation data.

scholarly journals Neutrino oscillations and the early universe

Open Physics ◽  
2004 ◽  
Vol 2 (3) ◽  
Author(s):  
Daniela Kirilova
Keyword(s):  
Early Universe ◽  
Neutrino Oscillation ◽  
Neutrino Oscillations ◽  
Atmospheric Neutrino ◽  
Short Review ◽  
Big Bang ◽  
Big Bang Nucleosynthesis ◽  
Cosmological Constraints ◽  
Theoretical Status

AbstractThe observational and theoretical status of neutrino oscillations in connection with solar and atmospheric neutrino anomalies is presented briefly. The effect of neutrino oscillations on the evolution of the early Universe is discussed in detail. A short review is given of the standard Big Bang Nucleosynthesis (BBN) and the influence of resonant and non-resonant neutrino oscillations on active neutrinos and on primordial synthesis of He-4. BBN cosmological constraints on neutrino oscillation parameters are discussed.

scholarly journals Reinterpreting the ATLAS bounds on heavy neutral leptons in a realistic neutrino oscillation model

2021 ◽  
Vol 2021 (12) ◽  
Author(s):  
J.-L. Tastet ◽  
O. Ruchayskiy ◽  
I. Timiryasov
Keyword(s):  
Neutrino Oscillation ◽  
Neutrino Oscillations ◽  
Realistic Model ◽  
Model Parameters ◽  
Exclusion Limit ◽  
Final State ◽  
Mixing Angle ◽  
Mixing Angles ◽  
Oscillation Model ◽  
Free Parameters

Abstract Heavy neutral leptons (HNLs) are hypothetical particles, motivated in the first place by their ability to explain neutrino oscillations. Experimental searches for HNLs are typically conducted under the assumption of a single HNL mixing with a single neutrino flavor. However, the resulting exclusion limits may not directly constrain the corresponding mixing angles in realistic HNL models — those which can explain neutrino oscillations. The reinterpretation of the results of these experimental searches turns out to be a non-trivial task, that requires significant knowledge of the details of the experiment. In this work, we perform a reinterpretation of the latest ATLAS search for HNLs decaying promptly to a tri-lepton final state. We show that in a realistic model with two HNLs, the actual limits can vary by several orders of magnitude depending on the free parameters of the model. Marginalizing over the unknown model parameters leads to an exclusion limit on the total mixing angle which can be up to 3 orders of magnitude weaker than the limits reported in ref. [1]. This demonstrates that the reinterpretation of results from experimental searches is a necessary step to obtain meaningful limits on realistic models. We detail a few steps that can be taken by experimental collaborations in order to simplify the reuse of their results.

NEUTRINO FLAVOR AND CP/T VIOLATION

2001 ◽  
Vol 16 (supp01b) ◽  
pp. 767-769
Author(s):  
SARAH C. CAMPBELL ◽  
SARAH R. NUSS-WARREN ◽  
LORETTA M. JOHNSON ◽  
DOUGLAS W. MCKAY
Keyword(s):  
Neutrino Oscillation ◽  
Neutrino Oscillations ◽  
T Violation ◽  
Neutrino Flavor ◽  
Order Of Magnitude

We investigate the implications of direct flavor-violating interactions in addition to neutrino oscillations for neutrino oscillations for neutrino oscillation experiments. We show that MINOS and neutrino factories could achieve at least order of magnitude improvements in constraining neutrino flavor-violating parameters.

scholarly journals Review of neutrino oscillations with sterile and active neutrinos

2016 ◽  
Vol 31 (23) ◽  
pp. 1630037 ◽  
Author(s):  
Leonard S. Kisslinger
Keyword(s):  
Neutrino Oscillation ◽  
Neutrino Oscillations ◽  
Sterile Neutrinos

Recently neutrino oscillation experiments have shown that it is very likely that there are one or two sterile neutrinos. In this review neutrino oscillations with one, two, three sterile and three active neutrinos, and parameters that are consistent with experiments, are reviewed.

scholarly journals LORENTZ-NONINVARIANT NEUTRINO OSCILLATIONS: MODEL AND PREDICTIONS

2006 ◽  
Vol 21 (01) ◽  
pp. 161-183 ◽  
Author(s):  
FRANS R. KLINKHAMER
Keyword(s):  
Simple Model ◽  
Neutrino Oscillation ◽  
Neutrino Oscillations ◽  
Experimental Results ◽  
General Idea ◽  
Mixing Angles ◽  
Oscillation Model ◽  
Model Predictions ◽  
Point Splitting ◽  
Fermi Point

We present a three-parameter neutrino-oscillation model for three flavors of massless neutrinos with Fermi-point splitting and tri-maximal mixing angles. One of these parameters is the T-violating phase ∊, for which the experimental results from K2K and KamLAND appear to favor a nonzero value. In this paper, we give further model predictions for neutrino oscillations. Upcoming experiments will be able to test this simple model and the general idea of Fermi-point splitting. Possible implications for proposed experiments and neutrino factories are also discussed.

scholarly journals Understanding Neutrino Oscillations with Particle Accelerator Experiments

2021 ◽  
Vol 10 (3) ◽  
Author(s):  
Jiwon Woo ◽  
Gyuhyeon Lee
Keyword(s):  
Neutrino Oscillation ◽  
Probability Function ◽  
Neutrino Oscillations ◽  
Mass Difference ◽  
Particle Accelerator ◽  
Muon Neutrinos ◽  
Electron Neutrinos ◽  
The Standard Model ◽  
Neutrino Experiments ◽  
The Universe

Matter-dominant universe cannot be explained with the Standard Model. In order to understand why the current universe mainly consists of matter particles, scientists turned their attention to neutrino oscillations, and conducted research on the properties of the particle and its potential relationship with the matter-antimatter asymmetry observed in the universe. In this research, the probability function of a neutrino oscillation was studied for 2-neutrino case to understand neutrino oscillation in particle accelerator experiments. For a more practical study, the neutrino oscillation probability function was calculated for two neutrino experiments and was used to verify neutrino detector positions and calculated ∆m2 which is mass difference between oscillating two different neutrinos. From this work, it was understood that detectors are located at positions with the highest probability for detecting neutrino oscillations, and it was also confirmed that neutrino were oscillating from muon neutrinos to electron neutrinos in particle accelerator experiments.

NEUTRINO OSCILLATIONS: DISCOVERY, CURRENT STATUS, FUTURE DIRECTIONS

2009 ◽  
Vol 24 (18n19) ◽  
pp. 3437-3446 ◽  
Author(s):  
TAKAAKI KAJITA
Keyword(s):  
Neutrino Oscillation ◽  
Present Status ◽  
Neutrino Oscillations ◽  
Future Prospect ◽  
Current Status ◽  
Neutrino Masses ◽  
Future Directions ◽  
Mixing Angles ◽  
The Future

Neutrino oscillation was discovered about 10 years ago. Since then, the knowledge on neutrino masses and mixing angles have been improving substantially. This article describes neutrino oscillation experiments; the discovery, the present status and the future prospect.

scholarly journals A new analysis of the MiniBooNE low-energy excess

2020 ◽  
Vol 2020 (11) ◽  
Author(s):  
C. Giunti ◽  
A. Ioannisian ◽  
G. Ranucci
Keyword(s):  
Neutrino Oscillation ◽  
Neutrino Oscillations ◽  
Sterile Neutrino ◽  
Statistical Significance ◽  
Photon Emission ◽  
Low Energy ◽  
Neutrino Mixing ◽  
Short Baseline ◽  
Energy Excess ◽  
Global Fit

Abstract We present the results of a new analysis of the data of the MiniBooNE experiment taking into account the additional background of photons from ∆+/0 decay proposed in ref. [1] and additional contributions due to coherent photon emission, incoherent production of higher mass resonances, and incoherent non-resonant nucleon production. We show that the new background can explain part of the MiniBooNE low-energy excess and the statistical significance of the MiniBooNE indication in favor of short-baseline neutrino oscillation decreases from 5.1σ to 3.6σ. We also consider the implications for short-baseline neutrino oscillations in the 3+1 active-sterile neutrino mixing framework. We show that the new analysis of the MiniBooNE data indicates smaller active-sterile neutrino mixing and may lead us towards a solution of the appearance-disappearance tension in the global fit of short-baseline neutrino oscillation data.

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