scholarly journals NEUTRINOS HAVE MASS — SO WHAT?

2004 ◽  
Vol 19 (38) ◽  
pp. 2799-2813 ◽  
Author(s):  
ANDRÉ DE GOUVÊA
Keyword(s):  
Neutrino Oscillation ◽  
New Physics ◽  
Neutrino Masses ◽  
Fundamental Physics ◽  
The Past ◽  
Theoretical Progress ◽  
New Information ◽  
Oscillation Phenomenon ◽  
Neutrino Experiments ◽  
Coherent Picture

In this brief review, we discuss the new physics unveiled by neutrino oscillation experiments over the past several years, and discuss several attempts at understanding the mechanism behind neutrino masses and lepton mixing. It is fair to say that, while significant theoretical progress has been made, we are yet to construct a coherent picture that naturally explains nonzero, yet tiny, neutrino masses and the newly revealed, puzzling patterns of lepton mixing. We discuss what the challenges are, and point to the fact that more experimental input (from both neutrino and "non-neutrino" experiments) is dearly required – and that new data is expected to reveal, in the next several years, new information. Finally, we draw attention to the fact that neutrinos may have only just begun to reshape fundamental physics, given the fact that we are yet to explain the LSND anomaly and because the neutrino oscillation phenomenon is ultimately sensitive to very small new-physics effects.

NEUTRINO PHYSICS – THEORY

2005 ◽  
Vol 20 (14) ◽  
pp. 2907-2918
Author(s):  
ANDRÉ DE GOUVÊA
Keyword(s):  
Neutrino Physics ◽  
Neutrino Oscillation ◽  
New Physics ◽  
Neutrino Masses ◽  
Fundamental Physics ◽  
Theoretical Progress ◽  
Oscillation Phenomenon ◽  
Coherent Picture

I discuss the new physics unveiled by neutrino oscillation experiments. It is fair to say that, while significant theoretical progress has been made, we are yet to construct a unique coherent picture that naturally explains non-zero, yet tiny, neutrino masses and the newly revealed pattern of lepton mixing. I discuss what the challenges are, and point to the fact that more experimental input is required. Finally, I draw attention to the fact that neutrinos may have only just begun to reshape fundamental physics, given the fact that we are still to explain the LSND anomaly and because the neutrino oscillation phenomenon is ultimately sensitive to very small new-physics effects.

Future prospects in neutrino physics

2021 ◽  
pp. 2130007
Author(s):  
Sandhya Choubey
Keyword(s):  
Neutrino Physics ◽  
Neutrino Oscillation ◽  
Atmospheric Neutrino ◽  
New Physics ◽  
Future Prospects ◽  
The Past ◽  
Long Baseline ◽  
Neutrino Experiments

Neutrino physics has come a long way and made great strides in the past decades. We discuss the prospects of what more can be learned in this field in the forthcoming neutrino oscillation facilities. We will mostly focus on the potential of the long-baseline experiments and the atmospheric neutrino experiments. Sensitivity of these experiments to standard neutrino oscillation parameters will be presented. We will also discuss the prospects of new physics searches at these facilities.

scholarly journals Non-standard interactions in SMEFT confronted with terrestrial neutrino experiments

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Yong Du ◽  
Hao-Lin Li ◽  
Jian Tang ◽  
Sampsa Vihonen ◽  
Jiang-Hao Yu
Keyword(s):  
Neutrino Oscillation ◽  
New Physics ◽  
Effective Field ◽  
Scalar Leptoquark ◽  
Double Chooz ◽  
The Standard Model ◽  
Reactor Neutrino ◽  
Model Independent ◽  
Neutrino Experiments ◽  
Individual Dimension

Abstract The Standard Model Effective Field Theory (SMEFT) provides a systematic and model-independent framework to study neutrino non-standard interactions (NSIs). We study the constraining power of the on-going neutrino oscillation experiments T2K, NOνA, Daya Bay, Double Chooz and RENO in the SMEFT framework. A full consideration of matching is provided between different effective field theories and the renormalization group running at different scales, filling the gap between the low-energy neutrino oscillation experiments and SMEFT at the UV scale. We first illustrate our method with a top- down approach in a simplified scalar leptoquark model, showing more stringent constraints from the neutrino oscillation experiments compared to collider studies. We then provide a bottom-up study on individual dimension-6 SMEFT operators and find NSIs in neutrino experiments already sensitive to new physics at ∼20 TeV when the Wilson coefficients are fixed at unity. We also investigate the correlation among multiple operators at the UV scale and find it could change the constraints on SMEFT operators by several orders of magnitude compared with when only one operator is considered. Furthermore, we find that accelerator and reactor neutrino experiments are sensitive to different SMEFT operators, which highlights the complementarity of the two experiment types.

scholarly journals Brief Review of Solar Models and Solar Neutrino Experiments

1993 ◽  
Vol 137 ◽  
pp. 100-107
Author(s):  
Douglas R.O. Morrison
Keyword(s):  
Solar Neutrino ◽  
Input Data ◽  
New Physics ◽  
Solar Neutrinos ◽  
High Variability ◽  
Neutrino Masses ◽  
The Sun ◽  
Evolutionary Models ◽  
Solar Neutrino Problem ◽  
Neutrino Experiments

AbstractSolar Evolutionary Models are briefly reviewed and while the models are robust, there are uncertainties in the input data which justify rather larger errors. The 1992 experimental results from GALLEX, SAGE II and Kamiokande are shown to be consistent with calculated fluxes of solar neutrinos whereas the Chlorine results continue to be significantly low though this experiment has a problem with the high variability with time of its results in contradiction to Kamiokande. It is concluded that the evidence for a solar neutrino problem is not compelling and New Physics are not demanded. Further experiments are essential to search for neutrino masses and to study the Sun.

scholarly journals Neutrino Oscillations and Lorentz Invariance Violation

Universe ◽  
2020 ◽  
Vol 6 (3) ◽  
pp. 37 ◽  
Author(s):  
Marco Danilo Claudio Torri
Keyword(s):  
Neutrino Oscillation ◽  
Neutrino Oscillations ◽  
Lorentz Invariance ◽  
Theoretical Models ◽  
New Physics ◽  
Mass Hierarchy ◽  
Invariance Violation ◽  
Oscillation Phenomenon ◽  
Lorentz Invariance Violation ◽  
Exotic Physics

This work explores the possibility of resorting to neutrino phenomenology to detect evidence of new physics, caused by the residual signals of the supposed quantum structure of spacetime. In particular, this work investigates the effects on neutrino oscillations and mass hierarchy detection, predicted by models that violate Lorentz invariance, preserving the spacetime isotropy and homogeneity. Neutrino physics is the ideal environment where conducting the search for new “exotic” physics, since the oscillation phenomenon is not included in the original formulation of the minimal Standard Model (SM) of particles. The confirmed observation of the neutrino oscillation phenomenon is, therefore, the first example of physics beyond the SM and can indicate the necessity to resort to new theoretical models. In this work, the hypothesis that the supposed Lorentz Invariance Violation (LIV) perturbations can influence the oscillation pattern is investigated. LIV theories are indeed constructed assuming modified kinematics, caused by the interaction of massive particles with the spacetime background. This means that the dispersion relations are modified, so it appears natural to search for effects caused by LIV in physical phenomena governed by masses, as in the case of neutrino oscillations. In addition, the neutrino oscillation phenomenon is interesting since there are three different mass eigenstates and in a LIV scenario, which preserves isotropy, at least two different species of particle must interact.

scholarly journals FINALLY NEUTRINO HAS MASS

2000 ◽  
Vol 15 (05) ◽  
pp. 625-650 ◽  
Author(s):  
S. M. BILENKY ◽  
C. GIUNTI ◽  
C. W. KIM
Keyword(s):  
Neutrino Oscillation ◽  
Neutrino Mass ◽  
Solar Neutrino ◽  
Present Status ◽  
Neutrino Oscillations ◽  
Neutrino Masses ◽  
Atmospheric Neutrinos ◽  
Neutrino Experiments

The present status of the problem of neutrino mass, mixing and neutrino oscillations is briefly summarized. The evidence for oscillations of atmospheric neutrinos found recently in the Super-Kamiokande experiment is discussed. Indications in favor of neutrino oscillations obtained in solar neutrino experiments and in the accelerator LSND experiment are also considered. Implications of existing neutrino oscillation data for neutrino masses and mixing are discussed.

scholarly journals Study on the Neutrino Oscillation with a Next Generation Medium-Baseline Reactor Experiment

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Chang Dong Shin ◽  
Kyung Kwang Joo
Keyword(s):  
Neutrino Physics ◽  
Neutrino Oscillation ◽  
Precise Measurement ◽  
Neutrino Masses ◽  
Mass Hierarchy ◽  
Mixing Angle ◽  
Neutrino Oscillation Experiment ◽  
Reactor Neutrino ◽  
Reactor Neutrinos ◽  
Neutrino Experiments

For over fifty years, reactor experiments have played an important role in neutrino physics, in both discoveries and precision measurements. One of the methods to verify the existence of neutrino is the observation of neutrino oscillation phenomena. Electron antineutrinos emitted from a reactor provide the measurement of the small mixing angleθ13, providing rich programs of neutrino properties, detector development, nuclear monitoring, and application. Using reactor neutrinos, future reactor neutrino experiments, more precise measurements ofθ12,  Δm122, and mass hierarchy will be explored. The precise measurement ofθ13would be crucial for measuring the CP violation parameters at accelerators. Therefore, reactor neutrino physics will assist in the complete understanding of the fundamental nature and implications of neutrino masses and mixing. In this paper, we investigated several characteristics of RENO-50, which is a future medium-baseline reactor neutrino oscillation experiment, by using the GloBES simulation package.

scholarly journals UNVEILING NEUTRINO MIXING AND LEPTONIC CP VIOLATION

2005 ◽  
Vol 20 (01) ◽  
pp. 1-17 ◽  
Author(s):  
OLGA MENA
Keyword(s):  
Cp Violation ◽  
Neutrino Oscillation ◽  
Neutrino Masses ◽  
Neutrino Mixing ◽  
Mixing Angle ◽  
Long Baseline ◽  
Neutrino Experiments ◽  
Two Parameters ◽  
Present Understanding ◽  
Neutrino Masses And Mixings

We review the present understanding of neutrino masses and mixings, discussing what are the unknowns in the three-family oscillation scenario. Despite the anticipated success coming from the planned long baseline neutrino experiments in unraveling the leptonic mixing sector, there are two important unknowns which may remain obscure: the mixing angle θ13 and the CP-phase δ. The measurement of these two parameters has led us to consider the combination of superbeams and neutrino factories as the key to unveil the neutrino oscillation picture.

scholarly journals NuFIT: Three-Flavour Global Analyses of Neutrino Oscillation Experiments

Universe ◽  
2021 ◽  
Vol 7 (12) ◽  
pp. 459
Author(s):  
Maria Concepcion Gonzalez-Garcia ◽  
Michele Maltoni ◽  
Thomas Schwetz
Keyword(s):  
Neutrino Oscillation ◽  
Global Analysis ◽  
Neutrino Masses ◽  
Neutrino Mixing ◽  
Solar Reactor ◽  
Global Fit ◽  
Neutrino Experiments

In this contribution, we summarise the determination of neutrino masses and mixing arising from global analysis of data from atmospheric, solar, reactor, and accelerator neutrino experiments performed in the framework of three-neutrino mixing and obtained in the context of the NuFIT collaboration. Apart from presenting the latest status as of autumn 2021, we discuss the evolution of global-fit results over the last 10 years, and mention various pending issues (and their resolution) that occurred during that period in the global analyses.

scholarly journals Structure of flavor changing Goldstone boson interactions

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
Jin Sun ◽  
Yu Cheng ◽  
Xiao-Gang He
Keyword(s):  
Symmetry Breaking ◽  
Model Building ◽  
Neutral Current ◽  
Goldstone Boson ◽  
New Physics ◽  
Majorana Neutrino ◽  
Neutrino Masses ◽  
Type I ◽  
Flavor Changing ◽  
Flavor Changing Neutral Current

Abstract General flavor changing Goldstone boson (GB) interactions with fermions from a spontaneous global U(1)G symmetry breaking are discussed. This GB may be the Axion, solving the strong QCD CP problem, if there is a QCD anomaly for the assignments of quarks U(1)G charge. Or it may be the Majoron, producing seesaw Majorana neutrino masses by lepton number violation, if the symmetry breaking scale is much higher than the electroweak scale. It may also, in principle, play the roles of Axion and Majoron simultaneously as far as providing solution for the strong CP problem and generating a small Majorana neutrino masses are concerned. Great attentions have been focused on flavor conserving GB interactions. Recently flavor changing Axion and Majoron models have been studied in the hope to find new physics from rare decays in the intensity frontier. In this work, we will provide a systematic model building aspect study for flavor changing neutral current (FCNC) GB interactions in the fermion sectors, or separately in the quark, charged lepton and neutrino sectors and will identify in detail the sources of FCNC interactions in a class of beyond standard model with a spontaneous global U(1)G symmetry breaking. We also provide a general proof of the equivalence of using physical GB components and GB broken generators for calculating GB couplings to two gluons and two photons, and discuss some issues related to spontaneous CP violation models. Besides, we will also provide some details for obtaining FCNC GB interactions in several popular models, such as the Type-I, -II, -III seesaw and Left-Right symmetric models, and point out some special features in these models.

Sign in / Sign up

Export Citation Format

Share Document