Journal ArticleDOI
Horizontal symmetry and quark-lepton mass spectrum: The SU(5) ⊗ SU(3)H model
TLDR
In this article, a new mechanism of quark and lepton mass generation via their mixing with hypothetical superheavy fermions is discussed for the model with the SU(5) ⊗ SU(3) H symmetry.About:
This article is published in Physics Letters B.The article was published on 1985-01-03. It has received 117 citations till now. The article focuses on the topics: Lepton & Spontaneous symmetry breaking.read more
Citations
More filters
Journal ArticleDOI
Mass matrix models
TL;DR: In this paper, it is shown that the hierarchy in the masses and mixing of quarks is a result of a horizontal symmetry, and that the smallness of various parameters is related to their suppression by high powers of a scale of new physics.
Journal ArticleDOI
Mass matrix models: The Sequel
TL;DR: The smallness of the quark sector parameters and the hierarchy between them could be the result of a horizontal symmetry broken by a small parameter as discussed by the authors, which can also lead to many interesting results: quark-squark alignment that would suppress, without squark degeneracy, neutral currents induced by supersymmetric particles, exact relations between mass ratios and mixing angles, a solution of the μ-problem and a natural mechanism for obtaining hierarchy among various symmetry-breaking scales.
Journal ArticleDOI
Should squarks be degenerate
Yosef Nir,Nathan Seiberg +1 more
TL;DR: In this paper, the authors proposed an alternative mechanism to suppress squark contributions to flavor changing neutral currents: the alignment of quark with squark mass matrices, which arises naturally in the framework of abelian horizontal symmetries.
Journal ArticleDOI
Fermion masses and mixing angles from /SU(3) family symmetry
Stephen F. King,Graham G. Ross +1 more
TL;DR: In this article, the SU(3) family symmetry was used to describe quark and lepton masses and mixing angles, including approximate bi-maximal mixing in the neutrino sector suitable for the low or quasi-vacuum solar solutions.
Journal ArticleDOI
The landscape of QCD axion models
TL;DR: The landscape of QCD axion models is reviewed in this paper, where theoretical constructions that extend the window for the axion mass and couplings beyond conventional regions are highlighted and classified Bounds from cosmology, astrophysics and experimental searches are reexamined and updated
References
More filters
Journal ArticleDOI
Unity of All Elementary Particle Forces
Howard Georgi,Sheldon L. Glashow +1 more
TL;DR: In this paper, strong, electromagnetic, and weak forces are conjectured to arise from a single fundamental interaction based on the gauge group SU(5), which is known as SU(4).
Journal ArticleDOI
Grand unified theories and proton decay
Paul Langacker,Paul Langacker +1 more
TL;DR: In this paper, a detailed description of many of the necessary background topics, including gauge theories, spontaneous symmetry breaking, the standard SU2 x U1 electroweak model and its modifications and extensions, Majorana and Dirac neutrino masses, the induced cosmological term, CP violation, quantum chromodynamics and its symmetries, and dynamical symmetry breaking are reviewed.
Journal ArticleDOI
Quark Masses and Flavor Mixing
Harald Fritzsch,Harald Fritzsch +1 more
TL;DR: In this article, the possibility of calculating the flavor mixing angles in the six-quark theory based on the gauge group SU(2) L × SU( 2) R × U(1) is discussed.
Journal ArticleDOI
Cosmology and elementary particles
TL;DR: In this paper, the restrictions on elementary particle properties which can be derived from cosmological and astrophysical data are considered, and the inverse relations between micro- and macrophysics are also discussed, in particular the origin of the baryon asymmetry of the universe.
Journal ArticleDOI
Quark mixing in weak interactions
TL;DR: In this paper, the status of the quark mixing in weak interaction is reviewed and the 3×3 quark matrix for the three left-handed doublet model is analyzed using various experimental information involving strange, charmed, and b-flavored particles.