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.

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 Unitarity of neutrino mixing matrix

2019 ◽  
Vol 206 ◽  
pp. 09009
Author(s):  
Ha Nguyen Thi Kim ◽  
Van Nguyen Thi Hong ◽  
Son Cao Van
Keyword(s):  
Cp Violation ◽  
Neutrino Oscillations ◽  
Graphical Form ◽  
Muon Neutrinos ◽  
Neutrino Mixing ◽  
Electron Neutrinos ◽  
Tau Neutrinos ◽  
The Matrix ◽  
Mixing Matrix ◽  
Unitary Triangle

Neutrinos are neutral leptons and there exist three types of neutrinos (electron neutrinos νe, muon neutrinos νµ and tau neutrinos ντ). These classifications are referred to as neutrinos’s “flavors”. Oscillations between the different flavors are known as neutrino oscillations, which occurs when neutrinos have mass and non-zero mixing. Neutrino mixing is governed by the PMNS mixing matrix. The PMNS mixing matrix is constructed as the product of three independent rotations. With that, we can describe the numerical parameters of the matrix in a graphical form called the unitary triangle, giving rise to CP violation. We can calculate the four parameters of the mixing matrix to draw the unitary triangle. The area of the triangle is a measure of the amount of CP violation.

scholarly journals Atmospheric Neutrinos

2012 ◽  
Vol 2012 ◽  
pp. 1-24 ◽  
Author(s):  
Takaaki Kajita
Keyword(s):  
Atmospheric Neutrino ◽  
Decay Chain ◽  
Muon Neutrinos ◽  
Atmospheric Neutrinos ◽  
Electron Neutrinos ◽  
Tau Neutrinos ◽  
Decay Products ◽  
Charged Pions ◽  
Neutrino Experiments ◽  
Energy Dependent

Atmospheric neutrinos are produced as decay products in hadronic showers resulting from collisions of cosmic rays with nuclei in the atmosphere. Electron-neutrinos and muon-neutrinos are produced mainly by the decay chain of charged pions to muons to electrons. Atmospheric neutrino experiments observed zenith angle and energy-dependent deficit of muon-neutrino events. It was found that neutrino oscillations between muon-neutrinos and tau-neutrinos explain these data well. This paper discusses atmospheric neutrino experiments and the neutrino oscillation studies with these neutrinos.

scholarly journals Combined Effect of NSI and SFP on Solar Electron Neutrino Oscillation

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Deniz Yilmaz
Keyword(s):  
Neutrino Oscillation ◽  
Solar Neutrino ◽  
Survival Probability ◽  
Low Energy ◽  
Electron Neutrino ◽  
Combined Effect ◽  
Neutrino Interaction ◽  
Dirac Particles ◽  
Electron Neutrinos ◽  
Neutrino Experiments

The combined effect of spin-flavor precession (SFP) and the nonstandard neutrino interaction (NSI) on the survival probability of solar electron neutrinos (assumed to be Dirac particles) is examined for various values ofϵ11,ϵ12, andμB. It is found that the neutrino survival probability curves affected by SFP and NSI effects individually for some values of the parameters (ϵ11,ϵ12, andμB) get close to the standard MSW curve when both effects are combined. Therefore, the combined effect of SFP and NSI needs to be taken into account when the solar electron neutrino data obtained by low energy solar neutrino experiments is investigated.

scholarly journals Kinetic Equation with Neutrino Oscillations in the Early Universe

1991 ◽  
Vol 44 (6) ◽  
pp. 591 ◽  
Author(s):  
Henry Granek ◽  
Bruce HJ McKellar
Keyword(s):  
Kinetic Equation ◽  
Early Universe ◽  
Neutrino Oscillations ◽  
Chemical Potential ◽  
Electron Neutrino ◽  
Cp Violations ◽  
Chemical Potentials ◽  
The Standard Model ◽  
Parameter Ranges ◽  
The Universe

This paper considers the kinetic equation for interacting neutrino gas in the context of an expanding early universe. It is suggested that if neutrino oscillations are present and CP violations occur prior to the decoupling of the neutrino gas from the rest of the universe, then lepton number may not be conserved and, in principle, significant permanent neutrino chemical potentials may develop and survive until the present day. This would lead to the wen known effect that if the electron neutrino chemical potential is significantly non-zero, then the primordial abundances of the light elements are affected and differ from those of the standard model. Numerical computation is required to examine the parameter ranges leading to a significant non-zero electron neutrino chemical potential.

The Daya Bay Experiment and the Discovery of a New Type of Neutrino Oscillation

2012 ◽  
Vol 01 (02) ◽  
pp. 45-49
Author(s):  
Yifang Wang
Keyword(s):  
Standard Model ◽  
Experimental Evidence ◽  
Neutrino Oscillation ◽  
Particle Physics ◽  
Weak Interactions ◽  
Daya Bay ◽  
The Standard Model ◽  
New Type ◽  
Charged Leptons ◽  
The Universe

We know nowadays that the matter world we live in is made of 12 elementary particles, including 6 quarks, 3 charged leptons and 3 neutrinos. Among them, neutrinos are least known since they do not carry the electric charge and interact with others only weakly (often referred as the nuclear weak interactions). In the Standard Model of particle physics before 1998, neutrinos are considered as massless for simplicity and lack of experimental evidence. However, they are so abundant in the universe that their masses, even if tiny, will have significant impact to the particle physics, astrophysics and cosmology.

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.

MONOLITH: A MASSIVE MAGNETIZED TRACKING CALORIMETER FOR THE STUDY OF ATMOSPHERIC NEUTRINO OSCILLATIONS

2001 ◽  
Vol 16 (supp01b) ◽  
pp. 736-738
Author(s):  
◽  
FRANCESCO TERRANOVA
Keyword(s):  
Neutrino Oscillation ◽  
Neutrino Oscillations ◽  
Atmospheric Neutrino ◽  
Cosmic Ray ◽  
High Energy ◽  
Neutrino Beam ◽  
Muon Neutrinos ◽  
Matter Effects ◽  
Sensitivity Range ◽  
Atmospheric Muon

MONOLITH is a proposed massive (34 kton) magnetized tracking calorimeter at the Gran Sasso laboratory in Italy, optimized for the detection of high energy atmospheric muon neutrinos. The main goal is to establish (or reject) the neutrino oscillation hypothesis through an explicit observation of the full first oscillation swing. The Δm2 sensitivity range for this measurement comfortably covers the complete Super-Kamiokande allowed region. Other measurements include studies of matter effects and the up/down ratio of NC events, the study of cosmic ray muons in the multi-TeV range, and auxiliary measurements from the CERN to Gran Sasso neutrino beam.

scholarly journals Search for Hidden Particles in Intensity Frontier Experiment SHiP

2019 ◽  
Vol 64 (8) ◽  
pp. 689
Author(s):  
V. M. Gorkavenko
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Particle Physics ◽  
Neutrino Oscillations ◽  
New Physics ◽  
Baryon Asymmetry ◽  
Heavy Particles ◽  
The Standard Model ◽  
The Future ◽  
The Universe

Despite the undeniable success of the Standard Model of particle physics (SM), there are some phenomena (neutrino oscillations, baryon asymmetry of the Universe, dark matter, etc.) that SM cannot explain. This phenomena indicate that the SM have to be modified. Most likely, there are new particles beyond the SM. There are many experiments to search for new physics that can be can divided into two types: energy and intensity frontiers. In experiments of the first type, one tries to directly produce and detect new heavy particles. In experiments of the second type, one tries to directly produce and detect new light particles that feebly interact with SM particles. The future intensity frontier SHiP experiment (Search for Hidden Particles) at the CERN SPS is discussed. Its advantages and technical characteristics are given.

scholarly journals SHORT-BASELINE ACTIVE-STERILE NEUTRINO OSCILLATIONS?

2007 ◽  
Vol 22 (33) ◽  
pp. 2499-2509 ◽  
Author(s):  
CARLO GIUNTI ◽  
MARCO LAVEDER
Keyword(s):  
Neutrino Oscillation ◽  
Neutrino Oscillations ◽  
Sterile Neutrino ◽  
Mass Difference ◽  
Atmospheric Neutrino ◽  
Radioactive Source ◽  
Short Baseline

We suggest the possibility that the anomalies observed in the LSND experiment and the Gallium radioactive source experiments may be due to neutrino oscillations generated by a large squared-mass difference of about 20–30 eV2. We consider the simplest 3+1 four-neutrino scheme that can accommodate also the observed solar and atmospheric neutrino oscillations. We show that, in this framework, the disappearance of [Formula: see text] and [Formula: see text] in short-baseline neutrino oscillation experiments is mainly due to active-sterile transitions. The implications of the first MiniBooNE results, appeared after the completion of this paper, are discussed in an addendum.

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