scholarly journals Neutrino oscillations and the leptonic charge of the universe

1991 ◽  
Vol 368 ◽  
pp. 1 ◽  
Author(s):  
Martin J. Savage ◽  
Robert A. Malaney ◽  
George M. Fuller
Keyword(s):  
Neutrino Oscillations ◽  
Leptonic Charge ◽  
The Universe

BARYOGENESIS IN AN SO(10) GUT MODEL WITH PATI–SALAM INTERMEDIATE SYMMETRY

1998 ◽  
Vol 13 (19) ◽  
pp. 1539-1546
Author(s):  
F. BUCCELLA ◽  
O. PISANTI ◽  
L. ROSA
Keyword(s):  
Experimental Data ◽  
Symmetry Breaking ◽  
Spontaneous Symmetry Breaking ◽  
Neutrino Oscillations ◽  
Baryon Asymmetry ◽  
Gauge Model ◽  
Electroweak Scale ◽  
Proton Lifetime ◽  
The Universe ◽  
Breaking Scale

The possibility of generating the observed baryon asymmetry of the universe in an SO(10) gauge model with spontaneous symmetry breaking pattern [Formula: see text] is studied. We find it possible to generate a [Formula: see text], converting the leptonic number produced at the B- L breaking scale via the B+L violating processes mediated by sphalerons at the electroweak scale. The resulting picture is tested against the limit coming from experimental data: proton lifetime and neutrino oscillations.

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.

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 Search for GeV-Scale Sterile Neutrinos Responsible for Active Neutrino Oscillations and Baryon Asymmetry of the Universe

2012 ◽  
Vol 2012 ◽  
pp. 1-17 ◽  
Author(s):  
S. N. Gninenko ◽  
D. S. Gorbunov ◽  
M. E. Shaposhnikov
Keyword(s):  
Standard Model ◽  
Neutrino Oscillations ◽  
Sterile Neutrino ◽  
High Energy ◽  
Baryon Asymmetry ◽  
Decay Length ◽  
Neutrino Masses ◽  
Sterile Neutrinos ◽  
Active Neutrino ◽  
The Universe

Standard Model fails to explain neutrino oscillations, dark matter, and baryon asymmetry of the Universe. All these problems can be solved with three sterile neutrinos added to SM. Quite remarkably, if sterile neutrino masses are well below the electroweak scale, this modification—Neutrino Minimal Standard Model (νMSM)—can be tested experimentally. We discuss a new experiment on search for decays of GeV-scale sterile neutrinos, which are responsible for the matter-antimatter asymmetry generation and for the active neutrino masses. If lighter than 2 GeV, these particles can be produced in decays of charm mesons generated by high energy protons in a target, and subsequently decay into SM particles. To fully explore this sector ofνMSM, the new experiment requires data obtained with at least1020incident protons on target (achievable at CERN SPS in future) and a big volume detector constructed from a large amount of identical single modules, with a total sterile neutrino decay length of few kilometers. The preliminary feasibility study for the proposed experiment shows that it has sensitivity which may either lead to the discovery of new particles below the Fermi scale—right-handed partners of neutrinos—or rule out seesaw sterile neutrinos with masses below 2 GeV.

scholarly journals Neutrino oscillations

2016 ◽  
Vol 4 (1) ◽  
Author(s):  
Meeta Sah
Keyword(s):  
Solar Energy ◽  
Neutrino Oscillations ◽  
Research Work ◽  
Helium Nucleus ◽  
Nuclear Process ◽  
Fundamental Particles ◽  
Neutrino Astronomy ◽  
Process Energy ◽  
Work Done ◽  
The Universe

The source of solar energy is such a nuclear process in which hydrogen nuclei fuse together to form Helium nucleus. In this process, energy is released along with positrons and neutrino. Scientists have absorbed and counted these neutrons thereby revealing many hidden mysteries of the universe and fundamental particles. Research work done in the field of Neutrino Astronomy has given information about three states of neutrino.

scholarly journals NEUTRINOS AND THE MATTER-ANTIMATTER ASYMMETRY IN THE UNIVERSE

2011 ◽  
Vol 20 (supp01) ◽  
pp. 56-64
Author(s):  
RICARDO GONZÁLEZ FELIPE
Keyword(s):  
Neutrino Physics ◽  
Particle Physics ◽  
Neutrino Oscillations ◽  
Baryon Asymmetry ◽  
Neutrino Masses ◽  
Seesaw Mechanism ◽  
Challenging Issue ◽  
Puzzling Problem ◽  
The Universe

The discovery of neutrino oscillations provides a solid evidence for nonzero neutrino masses and leptonic mixing. The fact that neutrino masses are so tiny constitutes a puzzling problem in particle physics. From the theoretical viewpoint, the smallness of neutrino masses can be elegantly explained through the seesaw mechanism. Another challenging issue for particle physics and cosmology is the explanation of the matter-antimatter asymmetry observed in Nature. Among the viable mechanisms, leptogenesis is a simple and well-motivated framework. In this paper we briefly review these aspects, making emphasis on the possibility of linking neutrino physics to the cosmological baryon asymmetry originated from leptogenesis.

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 MiniBooNE "WINDOWS ON THE UNIVERSE"

2011 ◽  
Vol 26 (03) ◽  
pp. 161-169
Author(s):  
RAY STEFANSKI
Keyword(s):  
Neutrino Oscillations ◽  
Current State ◽  
The Universe

We discuss the current state of measurements taken by MiniBooNE and emphasize the uniqueness of neutrino oscillations as an important probe into the "Windows on the Universe."

Neutrino Oscillations from Cosmic Sources: A Nu Window to Cosmology

1997 ◽  
Vol 12 (33) ◽  
pp. 2497-2501 ◽  
Author(s):  
D. J. Wagner ◽  
Thomas J. Weiler
Keyword(s):  
Neutrino Oscillations ◽  
Cosmological Parameters ◽  
Cosmological Parameter ◽  
Luminosity Distance ◽  
Oscillation Phase ◽  
Curved Space ◽  
History Of ◽  
Neutrino Astrophysics ◽  
The Universe ◽  
Cosmic History

Neutrino astrophysics promises a wealth of information about neutrinos and the history of the universe through which they have traveled. In this letter, we extend the standard neutrino qoscillation discussion to neutrinos propagating through expanding curved space. This extension introduces a new cosmological parameter in the oscillation phase. The new parameter ℐ records cosmic history in much the same manner as the redshift variable z or the apparent luminosity distance DL. Measuring ℐ through neutrino oscillations may help to determine cosmological parameters and distinguish between different cosmologies.

THE CONNECTION BETWEEN LOW-ENERGY LEPTONIC CP-VIOLATION AND LEPTOGENESIS

2005 ◽  
Vol 20 (07) ◽  
pp. 477-490 ◽  
Author(s):  
SILVIA PASCOLI
Keyword(s):  
Cp Violation ◽  
Neutrino Oscillations ◽  
Baryon Asymmetry ◽  
Low Energy ◽  
Seesaw Mechanism ◽  
Mixing Matrix ◽  
Energy Processes ◽  
The Universe

Within the context of the seesaw mechanism, we review the possible connection between the CP-violating phases which appear in the lepton unitary mixing matrix and are measurable in neutrino oscillations and other low-energy processes, with the ones which play a role in the generation of the baryon asymmetry of the universe through the leptogenesis mechanism.

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