202 research outputs found
Quark mixings as a test of a new symmetry of quark Yukawa couplings
Based on the hierarchy exhibited by quarks masses at low energies, we assume
that Yukawa couplings of up and down quarks are related by
at grand unification scales. This ansatz gives rise to a symmetrical CKM matrix
at the grand unification (GU) scale. Using three specific models as
illustrative examples for the evolution down to low energies, we obtain the
entries and asymmetries of the CKM matrix which are in very good agreement with
their measured values. This indicates that the small asymmetry of the CKM
matrix at low energies may be the effect of the renormalization group evolution
only.Comment: LaTeX file, 10 pages including 1 tabl
Renormalization group evolution of the CKM matrix
We present here the most important ideas, equations and solutions for the
running of all the quark Yukawa couplings and all the elements of the
Cabibbo-Kobayashi-Maskawa matrix, in the approximation of one loop, and up to
order , where is the sine of the Cabibbo
angle. Our purpose is to determine what the evolution of these parameters may
indicate for the physics of the standard model (SM), the minimal supersymmetric
standard model (MSSM) and for the Double Higgs Model (DHM).Comment: Talk given in the X Mexican School of Particles and Fields, Playa del
Carmen, Mexico, 2002. 6 pages, LaTeX, needs aipproc.cls styl
Lie antialgebras: cohomology and representations
We describe the main algebraic and geometric properties of the class of
algebras introduced in [arXiv:0705.1629]. We discuss their origins in
symplectic geometry and associative algebra, and the notions of cohomology and
representations. We formulate classification theorems and give a number of
examples.Comment: 11 pages, XXVII Workshop, Geometrical Methods in Mathematical
Physics., Bialowieza : Pologne (2008
Lorentz Covariant Distributions with the Spectral Conditions
The Lorentz covariant tempered disributions with the supports in the product
of the closed upper light cones are described.Comment: 13 page
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