Numerical analysis of the quark mass matrix

2002 ◽  
Author(s):  
Maritza de Coss
Keyword(s):  
Numerical Analysis ◽  
Quark Mass ◽  
Mass Matrix

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.

NEUTRINO OSCILLATION AND LEPTON MASS MATRIX

1994 ◽  
Vol 09 (01) ◽  
pp. 41-50 ◽  
Author(s):  
KEN-ITI MATUMOTO ◽  
DAIJIRO SUEMATSU
Keyword(s):  
Solar Neutrino ◽  
Phase Structure ◽  
Quark Mass ◽  
Mass Matrix ◽  
Lepton Sector ◽  
Solar Neutrino Problem ◽  
Quark Sector ◽  
Mass Matrices ◽  
Suppression Mechanism ◽  
The Right

We apply the empirical quark mass matrices to the lepton sector and study the solar neutrino problem and the atmospheric vμ deficit problem simultaneously. We show that their consistent explanation is possible on the basis of these matrices. The lepton sector mass matrices need the phase structure which is different from the ones of the quark sector. However, even if the phase structure of the mass matrices is identical in both sectors, an interesting suppression mechanism of sin 2 2θ12 which is related to the solar neutrino problem can be induced from the right-handed neutrino Majorana mass matrix. We discuss such a possibility through the concrete examples.

Quark mass matrix and discrete symmetries in the SU(2) ⊗ U(1) model

1978 ◽  
Vol 74 (4-5) ◽  
pp. 344-346 ◽  
Author(s):  
R. Barbieri ◽  
R. Gatto ◽  
F. Strocchi
Keyword(s):  
Discrete Symmetries ◽  
Quark Mass ◽  
Mass Matrix

scholarly journals The Quark Mass Matrix

1993 ◽  
Vol 89 (6) ◽  
pp. 1235-1247
Author(s):  
S. Kanemaki ◽  
I. Furuoya
Keyword(s):  
Quark Mass ◽  
Mass Matrix

RANK-ONE MASS MATRIX AND PHENOMENOLOGICAL CONSTRAINTS

1992 ◽  
Vol 07 (09) ◽  
pp. 757-762
Author(s):  
MANOJ K. SAMAL
Keyword(s):  
Top Quark ◽  
Quark Mass ◽  
Mass Matrix ◽  
Top Quark Mass ◽  
Mass Matrices ◽  
Rank One

We give the phenomenological constraints for a scheme which was recently proposed to investigate the approximately symmetric KM matrix in relation to the rank-one quark mass matrices. The allowed ranges for the parameters in this scheme are given. It is shown that out of the three interesting solutions of the symmetric KM matrix discussed in this scheme one is inconsistent with experiments, whereas another one requires a very heavy top quark mass (m t ≈255 GeV ) to be consistent.

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.

Quark mass matrix with family-independent quark mixing

1989 ◽  
Vol 39 (5) ◽  
pp. 1391-1395 ◽  
Author(s):  
Yoshio Koide
Keyword(s):  
Quark Mass ◽  
Mass Matrix ◽  
Quark Mixing

b → s(d)γ WITH A VECTOR-LIKE QUARK AS FOURTH GENERATION

1995 ◽  
Vol 10 (04) ◽  
pp. 309-322 ◽  
Author(s):  
L. T. HANDOKO ◽  
T. MOROZUMI
Keyword(s):  
Special Form ◽  
Quark Mass ◽  
Mass Matrix ◽  
Fourth Generation

We study the implications of a vector-like quark, especially a down-type vector-like quark in b → s(d)γ including the neutral Higgs in the calculation. After analyzing some possible constraints for the mixing, the contribution may be significant for the b → dγ, but not for the b→sγ. We also find that the FCNC among ordinary quarks vanishes for a special form of down-type quark mass matrix.

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