scholarly journals Lepton mixing parameters from Δ(48) family symmetry and generalised CP

2014 ◽  
Vol 2014 (6) ◽  
Author(s):  
Gui-Jun Ding ◽  
Ye-Ling Zhou
Keyword(s):  
Family Symmetry ◽  
Mixing Parameters

scholarly journals A 3-3-1 model with low scale seesaw mechanisms

2019 ◽  
Vol 79 (10) ◽  
Author(s):  
A. E. Cárcamo Hernández ◽  
Yocelyne Hidalgo Velásquez ◽  
Nicolás A. Pérez-Julve
Keyword(s):  
Top Quark ◽  
Charged Lepton ◽  
Spontaneous Breaking ◽  
Fermion Mass ◽  
Neutrino Masses ◽  
Family Symmetry ◽  
Seesaw Mechanism ◽  
Lepton Flavor ◽  
Mixing Parameters ◽  
Active Neutrino

Abstract We construct a viable 3-3-1 model with two $$SU(3)_L$$SU(3)L scalar triplets, extended fermion and scalar spectrum, based on the $$T^{\prime }$$T′ family symmetry and other auxiliary cyclic symmetries, whose spontaneous breaking yields the observed pattern of SM fermion mass spectrum and fermionic mixing parameters. In our model the SM quarks lighter than the top quark, get their masses from a low scale Universal seesaw mechanism, the SM charged lepton masses are produced by a Froggatt-Nielsen mechanism and the small light active neutrino masses are generated from an inverse seesaw mechanism. The model is consistent with the low energy SM fermion flavor data and successfully accommodates the current Higgs diphoton decay rate and predicts charged lepton flavor violating decays within the reach of the forthcoming experiments.

scholarly journals The Chemical Evolution of the Main Component of the Binary System v Sagitarrii

1998 ◽  
Vol 11 (1) ◽  
pp. 390-390
Author(s):  
V. Leushin ◽  
V. Chuvenkov ◽  
L. Snezhko
Keyword(s):  
Chemical Composition ◽  
Binary System ◽  
Core Mass ◽  
Hydrogen Burning ◽  
Convective Mixing ◽  
Mixing Parameters ◽  
Burning Zone ◽  
Nuclear Burning ◽  
Nitrogen Abundance ◽  
Main Component

A model of internal structure and evolution of the peculiar binary system v Sgr is presented. The model corresponds well to the observed chemical composition of the main component atmosphere (10-4 H, 0.844 He, 0.013 C, 0.042 N by mass). It is supposed that about 5 million years ago the main component passed the stage of hydrogen nuclear burning in the shell over the helium core where the helium-carbon reactions took place. Because of convective mixing, the synthesized carbon diffusing into the hydrogen burning zone was catalyzing the reactions of the CN - cycle. This has resulted in anomalies in the chemical composition, particularly high nitrogen abundance in the layer observed now as the atmosphere of the main component since external layers were thrown off during the evolution. Following the calculated results, the quantitative restrictions of temperature and density in the layers and values of mixing parameters are obtained. It is shown that the best agreement with observations exists if the mass of the matter penetrating from the zone of helium-carbon reactions into the helium layer is 0.25 of the helium-carbon core mass. Moreover, the ratio of mass concentration He/C in this matter should equal 2, and the mass share diffusing into the layer of hydrogen burning should be in the range 0.25 - 0.30 of the layer mass.

scholarly journals Tracer Versus Observationally-Derived Constraints on Ocean Mixing Parameters in an Adjoint-Based Data Assimilation Framework

2020 ◽  
Author(s):  
David Trossman ◽  
Caitlin Whalen ◽  
Thomas Haine ◽  
Amy Waterhouse ◽  
Arash Bigdeli ◽  
...  
Keyword(s):  
Data Assimilation ◽  
Ocean Mixing ◽  
Mixing Parameters

The geography of numerical mixing in a suite of global ocean models

2021 ◽  
Author(s):  
Ryan Holmes ◽  
Jan Zika ◽  
Stephen Griffies ◽  
Andrew Hogg ◽  
Andrew Kiss ◽  
...  
Keyword(s):  
Ocean Circulation ◽  
General Circulation ◽  
Horizontal Resolution ◽  
Global Ocean ◽  
Vertical Diffusivity ◽  
Mixing Parameters ◽  
Ocean Models ◽  
Numerical Mixing ◽  
Comparable Magnitude ◽  
Ice Model

<p>Numerical mixing, the physically spurious diffusion of tracers due to the numerical discretization of advection, is known to contribute to biases in ocean circulation models. However, quantifying numerical mixing is non-trivial, with most studies utilizing specifically targeted experiments in idealized settings. Here, we present a precise method based on water-mass transformation for quantifying numerical mixing, including its spatial structure, that can be applied to any conserved variable in global general circulation ocean models. The method is applied to a suite of global MOM5 ocean-sea ice model simulations with differing grid spacings and sub-grid scale parameterizations. In all configurations numerical mixing drives across-isotherm heat transport of comparable magnitude to that associated with explicitly-parameterized mixing. Numerical mixing is prominent at warm temperatures in the tropical thermocline, where it is sensitive to the vertical diffusivity and resolution. At colder temperatures, numerical mixing is sensitive to the presence of explicit neutral diffusion, suggesting that much of the numerical mixing in these regions acts as a proxy for neutral diffusion when it is explicitly absent. Comparison of equivalent (with respect to vertical resolution and explicit mixing parameters) 1/4-degree and 1/10-degree horizontal resolution configurations shows only a modest enhancement in numerical mixing at the eddy-permitting 1/4-degree resolution. Our results provide a detailed view of numerical mixing in ocean models and pave the way for future improvements in numerical methods.</p>

Most suitable mixing parameters for use in breeding breadwheat for processing quality

2009 ◽  
Vol 37 (1) ◽  
pp. 83-92 ◽  
Author(s):  
A. Neacşu ◽  
G. Stanciu ◽  
N. Săulescu
Keyword(s):  
Processing Quality ◽  
Mixing Parameters
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