scholarly journals Precision measurements ofB(D+→μ+νμ), the pseudoscalar decay constantfD+, and the quark mixing matrix element|Vcd|

2014 ◽  
Vol 89 (5) ◽  
Author(s):  
M. Ablikim ◽  
M. N. Achasov ◽  
X. C. Ai ◽  
O. Albayrak ◽  
D. J. Ambrose ◽  
...  
Keyword(s):  
Matrix Element ◽  
Precision Measurements ◽  
Quark Mixing ◽  
Mixing Matrix

Large Isospin-Mixing Matrix Element inC12

1972 ◽  
Vol 29 (6) ◽  
pp. 376-379 ◽  
Author(s):  
W. J. Braithwaite ◽  
J. E. Bussoletti ◽  
F. E. Cecil ◽  
G. T. Garvey
Keyword(s):  
Matrix Element ◽  
Mixing Matrix

scholarly journals Parametrization of Pontecorvo–Maki–Nakagawa–Sakata mixing matrix based on CP-violating bipair neutrino mixing

2015 ◽  
Vol 30 (05) ◽  
pp. 1550019 ◽  
Author(s):  
Jun Iizuka ◽  
Teruyuki Kitabayashi ◽  
Yuki Minagawa ◽  
Masaki Yasuè
Keyword(s):  
Matrix Element ◽  
Cp Violation ◽  
Numerical Computation ◽  
Neutrino Mixing ◽  
Mixing Angles ◽  
Neutrino Interactions ◽  
Reactor Neutrino ◽  
Mixing Matrix ◽  
Three Phases

CP violation in neutrino interactions is described by three phases contained in Pontecorvo–Maki–Nakagawa–Sakata mixing matrix (U PMNS ). We argue that the phenomenologically consistent result of the Dirac CP violation can be obtained if U PMNS is constructed along bipair neutrino mixing scheme, namely, requiring that |U12| = |U32| and |U22| = |U23| (case 1) and |U12| = |U22| and |U32| = |U33| (case 2), where Uij stands for the i × j matrix element of U PMNS . As a result, the solar, atmospheric and reactor neutrino mixing angles θ12, θ23 and θ13, respectively, are correlated to satisfy cos 2θ12 = sin 2 θ23 - tan 2 θ13 (case 1) or cos 2θ12 = cos 2 θ23 - tan 2 θ13 (case 2). Furthermore, if Dirac CP violation is observed to be maximal, θ23 is determined by θ13 to be: [Formula: see text] (case 1) or [Formula: see text] (case 2). For the case of non-maximal Dirac CP violation, we perform numerical computation to show relations between the CP-violating Dirac phase and the mixing angles.

ρ PARAMETER CONSTRAINTS ON FOURTH GENERATION QUARK MASSES

1990 ◽  
Vol 05 (10) ◽  
pp. 743-754 ◽  
Author(s):  
V. BARGER ◽  
J. L. HEWETT ◽  
T. G. RIZZO
Keyword(s):  
Fourth Generation ◽  
Quark Masses ◽  
Quark Mixing ◽  
Mixing Matrix ◽  
The Masses ◽  
Parameter Constraints

Constraints on the masses of possible fourth generation quarks (a, υ) are obtained from measurements of the ρ parameter and the elements of the quark mixing matrix. Stringent mass limits are found when the off-diagonal elements Vtυ and Vab are large. For example, with mt=90 GeV and |Vtυ|≃0.5 we find ma,v≤ 300 GeV. Stronger constraints are obtained as mt or |Vtυ| increase.

scholarly journals Constraints on the quark mixing matrix with vector-like quarks

2020 ◽  
Vol 960 ◽  
pp. 115208
Author(s):  
Drona Vatsyayan ◽  
Anirban Kundu
Keyword(s):  
Quark Mixing ◽  
Mixing Matrix

The quark mixing matrix in a composite model

1983 ◽  
Vol 149 (2) ◽  
pp. 273-285 ◽  
Author(s):  
H Katsumata ◽  
Y Tomozawa
Keyword(s):  
Composite Model ◽  
Quark Mixing ◽  
Mixing Matrix

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 TWO PREDICTIVE SUPERSYMMETRIC S3×Z2 MODELS FOR THE QUARK MASS MATRICES

2005 ◽  
Vol 20 (16) ◽  
pp. 1217-1225 ◽  
Author(s):  
LUÍS LAVOURA ◽  
ERNEST MA
Keyword(s):  
Quark Mass ◽  
Quark Mixing ◽  
Mass Matrices ◽  
Mixing Matrix ◽  
Simple Models

We propose two simple models for the quark mass matrices which may be implemented through an S3×Z2 symmetry in a supersymmetric context. Each model has eight parameters and, therefore, makes two independent predictions for the quark mixing matrix. The first model predicts [Formula: see text] and [Formula: see text]. The second model, in which the forms of the up-type-quark and down-type-quark mass matrices are interchanged relative to the first one, predicts |Vub/Vcb|~0.11 and |Vtd/Vts|~0.33. Both models have sin 2β~0.5.

scholarly journals Discrete symmetry and CP phase of the quark mixing matrix

2005 ◽  
Vol 620 (3-4) ◽  
pp. 151-155 ◽  
Author(s):  
Shao-Long Chen ◽  
Ernest Ma
Keyword(s):  
Discrete Symmetry ◽  
Quark Mixing ◽  
Mixing Matrix

Rosen-type derivation of the quark mixing matrix in three- and four-generation schemes

1988 ◽  
Vol 38 (3) ◽  
pp. 970-979 ◽  
Author(s):  
Takemi Hayashi ◽  
Ryuichi Najima ◽  
Morimitsu Tanimoto ◽  
Seiichi Wakaizumi
Keyword(s):  
Quark Mixing ◽  
Mixing Matrix
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