scholarly journals QUARK MIXING FROM MASS MATRIX MODEL WITH FLAVOR 2 ↔ 3 SYMMETRY

2008 ◽  
Vol 23 (27n28) ◽  
pp. 4557-4568 ◽  
Author(s):  
HIROYUKI NISHIURA ◽  
KOICHI MATSUDA ◽  
TAKESHI FUKUYAMA
Keyword(s):  
Experimental Data ◽  
Matrix Model ◽  
Present Model ◽  
Mass Matrix ◽  
Invariant Structure ◽  
Quark Mixing ◽  
Mixing Matrix ◽  
Free Parameters

We consider a universal mass matrix model which has a seesaw-invariant structure with the most general texture based on flavor 2 ↔ 3 symmetry common to all quarks and leptons. The CKM quark mixing matrix of the model is analyzed. It is shown that the model is consistent with all the experimental data of quark mixings by tuning free parameters of the model. We also show that the values of parameters of the present model consistent with the experimental data are not far from the ones of the mass matrix model with a vanishing (1, 1) element.

CAN FOUR-ZERO-TEXTURE MASS MATRIX MODEL REPRODUCE THE QUARK AND LEPTON MIXING ANGLES AND CP VIOLATING PHASES?

2007 ◽  
Vol 16 (05) ◽  
pp. 1395-1403
Author(s):  
KOICHI MATSUDA ◽  
TAKESHI FUKUYAMA ◽  
HIROYUKI NISHIURA
Keyword(s):  
Matrix Model ◽  
Mass Matrix ◽  
Common Zero ◽  
Lepton Sector ◽  
Mixing Angles ◽  
Quark Mixing ◽  
Mass Matrices ◽  
Mixing Matrix

We study the universal quark and lepton mass matrices in the framework of SO (10) GUT. Namely, all the mass matrices have common zero texture in our model. Furthermore, we set a strict restriction from SO (10) GUT on the mass matrices. We find that good fittings to the CKM quark mixing matrix are obtained and this model naturally derives the bi-large mixings in the lepton sector.

GENERAL STUDY OF QUARK MASS MATRICES WITH FULL OFF-DIAGONAL MIXING

1992 ◽  
Vol 07 (25) ◽  
pp. 6357-6370 ◽  
Author(s):  
ROBERT E. SHROCK
Keyword(s):  
Quark Mass ◽  
Mass Matrix ◽  
General Study ◽  
Mixing Angles ◽  
Quark Masses ◽  
Rotation Matrices ◽  
Quark Mixing ◽  
Down Quark ◽  
Mass Matrices ◽  
Mixing Matrix

We study an ansatz for the quark mass matrix in which all of the nondiagonal entries are nonzero, but which still allows the quark mixing angles to be calculated in terms of ratios of quark masses and certain phases. Analytic calculations of the orthogonal rotation matrices in the up and down quark sectors and the resultant observed quark mixing matrix are presented. Comparison with experimental data is given.

scholarly journals UNIVERSALITY OF QUARK–LEPTON MASS MATRIX

2013 ◽  
Vol 28 (08) ◽  
pp. 1350017 ◽  
Author(s):  
TAKESHI FUKUYAMA ◽  
HIROYUKI NISHIURA
Keyword(s):  
Charged Lepton ◽  
Mass Matrix ◽  
Unitary Matrix ◽  
Mixing Angle ◽  
Phase Parameter ◽  
Quark Mixing ◽  
Mass Matrices ◽  
Mixing Matrix ◽  
Best Fit

The recently observed lepton mixing angle θ13 of the MNS mixing matrix is well incorporated in a universal mixing hypothesis between quark and lepton sectors. This hypothesis asserts that, in the charged lepton diagonal base, all other mass matrices for up- and down-type quarks and light neutrinos are diagonalized by the same unitary matrix except for the phase elements. It is expressed as V CKM = U MNS (δ′)†PU MNS (δ) for quark mixing matrix V CKM and lepton mixing matrix U MNS (δ) in the phenomenological level. Here P is a diagonal phase mass matrix. δ′ is a slightly different phase parameter from the Dirac CP-violating phase δ = 1.1π (best fit) in the MNS lepton mixing matrix.

scholarly journals IS THE QUARK-MIXING MATRIX MODULI SYMMETRIC?

2004 ◽  
Vol 19 (02) ◽  
pp. 159-163 ◽  
Author(s):  
S. CHATURVEDI ◽  
VIRENDRA GUPTA
Keyword(s):  
Experimental Data ◽  
Simple Relation ◽  
Present Experimental Data ◽  
Quark Mixing ◽  
Mixing Matrix

If the unitary quark-mixing matrix, V, is moduli symmetric, it will depend on three real parameters. This means that there is a relation between the four parameters needed to parametrize a general V. It is shown that there exists a very simple relation involving |V11|2, |V33|2, [Formula: see text] and [Formula: see text]. This relation is compared with the present experimental data. It is concluded that a moduli symmetric V is not ruled out.

scholarly journals Underlying A4 symmetry for the neutrino mass matrix and the quark mixing matrix

2003 ◽  
Vol 552 (3-4) ◽  
pp. 207-213 ◽  
Author(s):  
K.S. Babu ◽  
Ernest Ma ◽  
J.W.F. Valle
Keyword(s):  
Neutrino Mass ◽  
Mass Matrix ◽  
Neutrino Mass Matrix ◽  
Quark Mixing ◽  
Mixing Matrix

scholarly journals HOW CAN CP VIOLATION IN THE NEUTRINO SECTOR BE LARGE IN A 2 ↔ 3 SYMMETRIC MODEL?

2010 ◽  
Vol 25 (18n19) ◽  
pp. 3661-3673 ◽  
Author(s):  
YOSHIO KOIDE ◽  
HIROYUKI NISHIURA
Keyword(s):  
Cp Violation ◽  
Neutrino Mass ◽  
Matrix Model ◽  
Mass Matrix ◽  
Neutrino Mass Matrix ◽  
Symmetric Model ◽  
Neutrino Sector ◽  
Phase Parameter ◽  
Mixing Matrix

Based on a neutrino mass matrix model in which a 2 ↔ 3 symmetry is only broken by a phase parameter, it is investigated how the lepton mixing matrix can deviate from the so-called tribimaximal mixing under a condition that CP is maximally violated.

scholarly journals Quark and lepton mass matrices described by charged lepton masses

2016 ◽  
Vol 31 (20) ◽  
pp. 1650125 ◽  
Author(s):  
Yoshio Koide ◽  
Hiroyuki Nishiura
Keyword(s):  
Matrix Model ◽  
Charged Lepton ◽  
Mass Matrix ◽  
Theoretical Aspect ◽  
Mass Matrices ◽  
Mass Ratios ◽  
Free Parameters ◽  
Remarkable Agreement

Recently, we proposed a unified mass matrix model for quarks and leptons, in which, mass ratios and mixings of the quarks and neutrinos are described by using only the observed charged lepton mass values as family-number-dependent parameters and only six family-number-independent free parameters. In spite of quite few parameters, the model gives remarkable agreement with observed data (i.e. Cabibbo–Kobayashi–Maskawa (CKM) mixing, Pontecorvo–Maki–Nakagawa–Sakata (PMNS) mixing and mass ratios). Taking this phenomenological success seriously, we give a formulation of the so-called Yukawaon model in detail from a theoretical aspect, especially for the construction of superpotentials and R charge assignments of fields. The model is considerably modified from the previous one, while the phenomenological success is kept unchanged.

TEMPERATURE DEPENDENCE OF THERMODYNAMIC PROPERTIES OF IONIC SOLIDS

2009 ◽  
Vol 23 (11) ◽  
pp. 2503-2509 ◽  
Author(s):  
S. K. SHARMA
Keyword(s):  
Experimental Data ◽  
Temperature Dependence ◽  
Volume Expansion ◽  
Close Agreement ◽  
Present Model ◽  
Expansion Ratio ◽  
Thermal Expansivity ◽  
Temperature Derivative ◽  
Computing Model ◽  
Ionic Solids

The present paper proposes a computing model for temperature dependence of volume thermal expansivity, volume expansion ratio and second order temperature derivative of volume based on the assumption that the product αKT remains constant at high temperatures and zero pressure. We have taken NaCl and KCl to testify the validity of the present model. A fairly close agreement between the calculated results and experimental data strongly supports the present model.

Metastable nanosized diamond formation from a C-H-O fluid system

2010 ◽  
Vol 25 (12) ◽  
pp. 2336-2340 ◽  
Author(s):  
S.K. Simakov
Keyword(s):  
Experimental Data ◽  
Chemical Vapor Deposition ◽  
Synthesis Gas ◽  
Vapor Deposition ◽  
Present Model ◽  
Chemical Vapor ◽  
Cvd Diamond ◽  
Diamond Synthesis ◽  
Diamond Formation ◽  
Fluid System

The model of nanosized diamond particles formation at metastable P-T parameters from a C-H-O fluid system is presented. It explains the hydrothermal formation and growth of diamond and the specifics of chemical vapor deposition (CVD) diamond synthesis gas mixtures at low P-T parameters. Further, the model explains the genesis of interstellar nanodiamond formations in space and the genesis of metamorphic microdiamonds in shallow depth Earth rocks. In contrast to models where many possible reactions are considered, the present model makes the simplest possible assumptions about the key processes, and is then able to account for various tendencies seen in experimental data.

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