scholarly journals Lorentz and CPT violation: a simple neutrino-oscillation model

2005 ◽  
Vol 149 ◽  
pp. 209-211
Author(s):  
Frans R. Klinkhamer
Keyword(s):  
Neutrino Oscillation ◽  
Cpt Violation ◽  
Oscillation Model

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.

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.

Neutrino experiments: Hierarchy, CP, CPT

2016 ◽  
Vol 31 (20n21) ◽  
pp. 1630030
Author(s):  
Manmohan Gupta ◽  
Monika Randhawa ◽  
Mandip Singh
Keyword(s):  
Neutrino Physics ◽  
Cp Violation ◽  
Neutrino Oscillation ◽  
Neutrino Mass ◽  
Cpt Violation ◽  
Leptonic Sector ◽  
Neutrino Experiments

We present an overview of our recent investigations regarding the prospects of ongoing neutrino experiments as well as future experiments in determining few of the most important unknowns in the field of neutrino physics, specifically the neutrino mass ordering and leptonic CP-violation phase. The effect of matter oscillations on the neutrino oscillation probabilities has been exploited in resolving the degeneracy between the neutrino mass ordering and the CP violation phase in the leptonic sector. Further, we estimate the extent of extrinsic CP and CPT violation in the experiments with superbeams as well as neutrino factories.

scholarly journals Test of Lorentz and CPT violation with short baseline neutrino oscillation excesses

2013 ◽  
Vol 718 (4-5) ◽  
pp. 1303-1308 ◽  
Author(s):  
A.A. Aguilar-Arevalo ◽  
C.E. Anderson ◽  
A.O. Bazarko ◽  
S.J. Brice ◽  
B.C. Brown ◽  
...  
Keyword(s):  
Neutrino Oscillation ◽  
Cpt Violation ◽  
Short Baseline

scholarly journals Neutrino oscillation and CPT violation due to quantum decoherence at DUNE

2020 ◽  
Author(s):  
Félix Napoleón Díaz Desposorio ◽  
Juan Carrasco-Martinez ◽  
Alberto Gago
Keyword(s):  
Neutrino Oscillation ◽  
Quantum Decoherence ◽  
Cpt Violation
Sign in / Sign up

Export Citation Format

Share Document