New bounds on mixing angles and the t-quark mass

1985 ◽  
Vol 87 (1) ◽  
pp. 16-24
Author(s):  
H. Gilson
Keyword(s):  
Quark Mass ◽  
Mixing Angles

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 Quark mass matrices, textures and CKM precision measurements

2017 ◽  
Vol 32 (25) ◽  
pp. 1750151 ◽  
Author(s):  
Rohit Verma
Keyword(s):  
Quark Mass ◽  
Mass Matrix ◽  
Precision Measurements ◽  
Physical Parameters ◽  
Model Framework ◽  
Ckm Matrix ◽  
Mixing Angles ◽  
Mixing Parameters ◽  
Mass Matrices ◽  
Model Independent

In the light of several recent analyses pointing toward texture 4-zero Fritzsch-like quark mass matrices as the only viable structures for quark mass matrices, this work adopts a model independent approach to reconstruct an alternate and simplified structure of texture specific quark mass matrices in a generalized “[Formula: see text]-diagonal” basis within the Standard Model framework using the unitarity of CKM matrix and the observed hierarchies in quark mass spectra and mixing angles. It is observed that the measured [Formula: see text] values of the three physical parameters namely [Formula: see text], [Formula: see text] and [Formula: see text] naturally lead to the vanishing of (11) element in the down type quark mass matrix and that the single measurable CP violating phase [Formula: see text] in the CKM matrix is sufficient enough in [Formula: see text] to explain the observed mixing pattern in a suitable basis. The leading order as well as exact analytic phenomenological solutions are addressed for the modest pattern of quark mass matrices derived from CKM matrix and precision measurements of mixing parameters.

GLUINO INDUCED QUARK MASS MATRICES

1991 ◽  
Vol 06 (12) ◽  
pp. 1089-1094 ◽  
Author(s):  
ERNEST MA ◽  
KEVIN MCILHANY
Keyword(s):  
Standard Model ◽  
Quark Mass ◽  
Gluino Mass ◽  
Radiative Effects ◽  
Supersymmetric Extension ◽  
Mixing Angles ◽  
Quark Masses ◽  
Mass Matrices ◽  
The Standard Model ◽  
Model Fits

We present a supersymmetric extension of the standard model where all quark masses and mixing angles except mt are derived as radiative effects induced by the gluino mass. We demonstrate in detail that our model fits well with present data on Vcb and Vub, etc.

scholarly journals EVOLUTION OF THE QUARK MASS MATRIX

2002 ◽  
Vol 17 (23) ◽  
pp. 1525-1532
Author(s):  
MARITZA DE COSS ◽  
RODRIGO HUERTA
Keyword(s):  
Numerical Analysis ◽  
Quark Mass ◽  
Mass Matrix ◽  
Matrix Elements ◽  
Weak Basis ◽  
Mixing Angles ◽  
Quark Masses ◽  
Down Quark ◽  
Up Quark ◽  
Experimental Errors

Starting from a weak basis in which the up (or down) quark matrix is diagonal, we obtain an exact set of equations for the quark mass matrix elements in terms of known observables. We make a numerical analysis of the down (up) quark mass matrix. Using the data available for the quark masses and mixing angles at different energy scales, we found a numerical expression for these matrices. We also examine the most general case when the complex phases are introduced in the mass matrix. We find the numerical value for these phases as a function of δ, the CP-violating phase. The entire evolution of the mass matrix is found propagating the experimental errors to the final results.

A SIMPLE ANSATZ RELATING ALL MIXING ANGLES TO QUARK MASS RATIOS

1991 ◽  
Vol 06 (24) ◽  
pp. 2243-2247 ◽  
Author(s):  
DANIEL NG ◽  
Y. JACK NG
Keyword(s):  
Cp Violation ◽  
Quark Mass ◽  
Matrix Elements ◽  
Mixing Angles ◽  
Mass Matrices ◽  
Mass Ratios

A simple ansatz for quark mass matrices which yields the Kac–Moody (KM) matrix elements, [Formula: see text], Vcb = ms/mb, and [Formula: see text], is investigated, resulting in two empirical identities, md/ms = ms/mb and mu/mc = mc/mt. Using Vub = 0.004 ± 0.002, we obtain mt = (290 ± 140) GeV . We find that this prediction is consistent with other processes, such as [Formula: see text] mixing. The invariant quantity, J, of CP violation is of the order 3 × 10−5 in agreement with experiments.

scholarly journals QUARK MASS MATRICES IN THE A4 MODEL

2002 ◽  
Vol 17 (10) ◽  
pp. 627-630 ◽  
Author(s):  
ERNEST MA
Keyword(s):  
Gauge Symmetry ◽  
Quark Mass ◽  
Spontaneous Breaking ◽  
Charged Current ◽  
Lepton Sector ◽  
Mixing Angles ◽  
Quark Masses ◽  
Mass Matrices ◽  
The Standard Model ◽  
Mixing Matrix

If the standard model of quark interactions is supplemented by a discrete A4 symmetry (which may be relevant for the lepton sector), the spontaneous breaking of the electroweak gauge symmetry allows arbitrary quark masses, but all mixing angles are predicted to be zero. A pattern of the explicit breaking of A4 is proposed, which results in a realistic charged-current mixing matrix.

EVADING THE TOP MASS BOUND IN THE FRITZSCH SCHEME

1992 ◽  
Vol 07 (04) ◽  
pp. 309-313 ◽  
Author(s):  
SUBHASH RAJPOOT
Keyword(s):  
Top Quark ◽  
Quark Mass ◽  
Mass Matrix ◽  
Diagonal Element ◽  
Present Knowledge ◽  
Top Quark Mass ◽  
Mixing Angles ◽  
Mass Matrices ◽  
Top Mass ◽  
Existing Data

The Fritzsch ansatz for the quark mass matrices will run into conflict with the existing data on the Cabibbo-Kobyashi-Maskawa mixing angles if the top quark mass turns out to be much greater than 90 GeV. A modification of the Fritzsch scheme is presented in which only one diagonal element of the quark mass matrix vanishes. The new scheme is still simple to analyze exactly and can easily accommodate top quark mass as heavy as 250 GeV or more without conflicting with our present knowledge on the weak interaction mixing angles.

B-Meson decay, CPviolation, mixing angles and the top quark mass

1984 ◽  
Vol 238 (3) ◽  
pp. 529-560 ◽  
Author(s):  
A.J. Buras ◽  
W. Słominski ◽  
H. Steger
Keyword(s):  
Top Quark ◽  
Quark Mass ◽  
B Meson ◽  
Meson Decay ◽  
Top Quark Mass ◽  
Mixing Angles ◽  
B Meson Decay

scholarly journals Quark mass ratios and mixing angles from SU(3) family gauge symmetry

2006 ◽  
Vol 637 (4-5) ◽  
pp. 245-250 ◽  
Author(s):  
Thomas Appelquist ◽  
Yang Bai ◽  
Maurizio Piai
Keyword(s):  
Gauge Symmetry ◽  
Quark Mass ◽  
Mixing Angles ◽  
Mass Ratios
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