GSW model of electroweak interactions

2018 ◽  
Author(s):  
Michael Kachelriess
Keyword(s):  
Gauge Symmetry ◽  
Higgs Sector ◽  
Electroweak Interactions ◽  
Hierarchy Problem ◽  
Fermion Masses ◽  
Electroweak Sector ◽  
Higgs Effect

The electroweak sector of the SM described by an SUL(2)UY(1) gauge symmetry which is broken spontaneously to Uem(1) is introduced. The generation of boson and fermion masses by the Higgs effect is discussed. The properties of the Higgs sector are examined. The conditions for decoupling and the hierarchy problem are discussed.

NEUTRINO SPECTRUM IN NONSUPERSYMMETRIC SO(10)

1996 ◽  
Vol 11 (36) ◽  
pp. 2837-2848
Author(s):  
GABRIELA BARENBOIM
Keyword(s):  
Higgs Sector ◽  
Fine Tuning ◽  
Hierarchy Problem ◽  
Yukawa Couplings ◽  
Neutrino Spectrum ◽  
Fermion Masses ◽  
Mass Matrices

We present a predictive scheme for fermion masses and mixings inspired by nonsupersymmetric SO(10) in which the hierarchy problem is resolved without fine tuning the Yukawa couplings. This calls for a nonminimal Higgs sector which we exploit in deriving the expressions for the mass matrices. To keep the predictivity of the model under control we limit the structure of the mass matrices by imposing U(1) symmetries. A very predictive neutrino spectrum is then obtained.

scholarly journals CHARGES AND MASS SPECTRUM IN THE PISANO–PLEITEZ–FRAMPTON 3-3-1 GAUGE MODEL

2008 ◽  
Vol 23 (14) ◽  
pp. 1011-1030 ◽  
Author(s):  
ION I. COTĂESCU ◽  
ADRIAN PALCU
Keyword(s):  
Mass Spectrum ◽  
Gauge Symmetry ◽  
Standard Model ◽  
Neutrino Mass ◽  
Higgs Mechanism ◽  
Gauge Model ◽  
Gauge Models ◽  
Fermion Masses ◽  
Mass Pattern ◽  
General Method

The Pisano–Pleitez–Frampton 3-3-1 model is revisited here within the framework of the general method for solving gauge models with high symmetries. This exact algebraical approach — proposed several years ago by one of us — was designed to include a minimal Higgs mechanism that spontaneously breaks the gauge symmetry up to the universal U(1)em electromagnetic one and, consequently, to supply the mass spectrum and the couplings of the currents for all the particles in the model. We prove in this paper that this powerful tool, when is applied to the PPF 3-3-1 model, naturally recovers the whole Standard Model phenomenology and, in addition, predicts — since a proper parametrization is employed — viable results such as: (i) the exact expressions for the boson and fermion masses, (ii) the couplings of the charged and neutral currents and (iii) a plausible neutrino mass pattern. A generalized Weinberg transformation is implemented, while the mixing between the neutral bosons Z and Z′ is performed as a necessary step by the method itself. Some phenomenological consequences are also sketched, including the strange possibility that simultaneously m(Z) = m(Z′) and m(W) = m(V) hold.

ELECTROWEAK INTERACTIONS WITH DISTINCTLY GAUGED QUARK AND LEPTON HYPERCHARGES

1986 ◽  
Vol 01 (12) ◽  
pp. 645-652 ◽  
Author(s):  
S. RAJPOOT
Keyword(s):  
Gauge Symmetry ◽  
Charge Asymmetry ◽  
Electroweak Interactions ◽  
Neutral Currents

The possibility that quarks and leptons have distinct hypercharge sources in nature is considered. This requires the gauge symmetry of electroweak interactions to be extended from SU (2)× U (1) to SU (2)× U (1)× U (1). Consistent with data on neutrino neutral currents and the measurement of forward-backward charge asymmetry in e+e−→μ+μ−, a second neutral boson exists that has mass either below or above the mass of the presently discovered neutral boson.

scholarly journals Supersymmetric U(1)Y′⊗ U(1)B−L extension of the Standard Model

2017 ◽  
Vol 32 (16) ◽  
pp. 1750093 ◽  
Author(s):  
J. C. Montero ◽  
V. Pleitez ◽  
B. L. Sánchez-Vega ◽  
M. C. Rodriguez
Keyword(s):  
Gauge Symmetry ◽  
Mass Spectra ◽  
Tree Level ◽  
Neutrino Masses ◽  
Type I ◽  
Seesaw Mechanism ◽  
Active Neutrino ◽  
Supersymmetric Version ◽  
Fermion Masses ◽  
The Standard Model

We build a supersymmetric version with [Formula: see text] gauge symmetry, where [Formula: see text] is a new charge and [Formula: see text] and [Formula: see text] are the usual baryonic and leptonic numbers. The model has three right-handed neutrinos with identical [Formula: see text] charges, and can accommodate all fermion masses at the tree level. In particular, the type I seesaw mechanism is implemented for the generation of the active neutrino masses. We obtain the mass spectra of all sectors and for the scalar one we also give the flat directions allowed by the model.

scholarly journals Gauge-Higgs Unification Models in Six Dimensions withS2/Z2Extra Space and GUT Gauge Symmetry

2012 ◽  
Vol 2012 ◽  
pp. 1-39
Author(s):  
Cheng-Wei Chiang ◽  
Takaaki Nomura ◽  
Joe Sato
Keyword(s):  
Gauge Symmetry ◽  
Higgs Sector ◽  
Electroweak Symmetry Breaking ◽  
Symmetry Condition ◽  
Electroweak Symmetry ◽  
Dimensional Theory ◽  
Additional Symmetry ◽  
Four Dimensions ◽  
Dimensional Spacetime ◽  
Spatial Dimensions

We review gauge-Higgs unification models based on gauge theories defined on six-dimensional spacetime withS2/Z2topology in the extra spatial dimensions. Nontrivial boundary conditions are imposed on the extraS2/Z2space. This review considers two scenarios for constructing a four-dimensional theory from the six-dimensional model. One scheme utilizes the SO(12) gauge symmetry with a special symmetry condition imposed on the gauge field, whereas the other employs the E6gauge symmetry without requiring the additional symmetry condition. Both models lead to a standard model-like gauge theory with theSU(3)×SU(2)L×U(1)Y(×U(1)2)symmetry and SM fermions in four dimensions. The Higgs sector of the model is also analyzed. The electroweak symmetry breaking can be realized, and the weak gauge boson and Higgs boson masses are obtained.

Neutrino mass and mixing in the 3-3-1 model with neutral leptons based on D4flavor symmetry

2014 ◽  
Vol 29 (23) ◽  
pp. 1450122 ◽  
Author(s):  
V. V. Vien
Keyword(s):  
Gauge Symmetry ◽  
Beta Decay ◽  
Neutrino Mass ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Neutrino Masses ◽  
Neutrino Mass And Mixing ◽  
Fermion Masses ◽  
Fermion Fields ◽  
Mixing Matrix

We propose a new D4flavor model based on SU (3)C⊗ SU (3)L⊗ U (1)Xgauge symmetry responsible for fermion masses and mixings in which all fermion fields act only as singlets under D4which differs from our previous work. The neutrinos get small masses from two SU (3)Lanti-sextets and one SU (3)Ltriplet which are all in singlets under D4. If a SU (3)LHiggs triplet, lying in [Formula: see text] under D4, is considered as a perturbation the corresponding neutrino mass mixing matrix gets the most general form. In this case, the model can fit the most recent data on neutrino masses and mixing with nonzero θ13. Our results show that the neutrino masses are naturally small. The sum of three light neutrino masses and the effective mass governing neutrinoless double beta decay are obtained that are consistent with the recent data.

scholarly journals ρ PARAMETER IN THE VECTOR CONDENSATE MODEL OF ELECTROWEAK INTERACTIONS

1994 ◽  
Vol 09 (18) ◽  
pp. 1701-1705 ◽  
Author(s):  
G. CYNOLTER ◽  
E. LENDVAI ◽  
G. POCSIK
Keyword(s):  
Gauge Symmetry ◽  
Standard Model ◽  
Vector Boson ◽  
Higgs Doublet ◽  
Electroweak Interactions ◽  
Gauge Bosons ◽  
Momentum Scale ◽  
The Standard Model ◽  
Vector Bosons

In the standard model of electroweak interactions the Higgs doublet is replaced by a doublet of vector bosons and the gauge symmetry is broken dynamically. This generates masses for the gauge bosons and fermions as well as it fixes the interactions in the model. The model has a low momentum scale. In this note we show that the model survives the test of the ρ parameter, and to each momentum scale ρ chooses a possible range of vector boson masses.

scholarly journals Raising the SUSY-breaking scale in a Goldstone–Higgs model

2017 ◽  
Vol 32 (27) ◽  
pp. 1750143 ◽  
Author(s):  
Tommi Alanne ◽  
Heidi Rzehak ◽  
Francesco Sannino ◽  
Anders Eller Thomsen
Keyword(s):  
Symmetry Breaking ◽  
Spontaneous Symmetry Breaking ◽  
Supersymmetry Breaking ◽  
Goldstone Boson ◽  
Higgs Sector ◽  
Global Symmetry ◽  
Electroweak Sector ◽  
Chiral Superfield ◽  
Breaking Scale

We show that by combining the elementary Goldstone–Higgs scenario and supersymmetry it is possible to raise the scale of supersymmetry breaking to several TeVs by relating it to the spontaneous-symmetry-breaking one. This is achieved by first enhancing the global symmetries of the super-Higgs sector to SU(4) and then embedding the electroweak sector and the Standard Model (SM) fermions. We determine the conditions under which the model achieves a vacuum such that the resulting Higgs is a pseudo-Goldstone boson (pGB). The main results are: the supersymmetry-breaking scale is identified with the spontaneous-symmetry-breaking scale of SU(4) which is several TeVs above the radiatively induced electroweak scale; intriguingly the global symmetry of the Higgs sector predicts the existence of two super-Higgs multiplets with one mass eigenstate playing the role of the pseudo-Goldstone Higgs; the symmetry-breaking dynamics fixes [Formula: see text] and requires a supplementary singlet chiral superfield. We finally discuss the spectrum of the model that now features the superpartners of the SM fermions and gauge bosons in the multi-TeV range.

scholarly journals (NON-)ALIGNED GAUGES AND GLOBAL GAUGE SYMMETRY BREAKING

2012 ◽  
Vol 27 (38) ◽  
pp. 1250222 ◽  
Author(s):  
AXEL MAAS
Keyword(s):  
Gauge Theory ◽  
Gauge Symmetry ◽  
Symmetry Breaking ◽  
Lattice Gauge Theory ◽  
Brst Symmetry ◽  
Baryon Density ◽  
Lattice Gauge ◽  
Global Gauge ◽  
Higgs Effect

The concept of (global) gauge symmetry breaking plays an important role in many areas of physics. Since the corresponding symmetry is a gauge symmetry, its breaking is actually gauge-dependent. Thus, it is possible to design gauges which restore the symmetry as good as possible. Such gauge constructions will be detailed here, illustrated with the use of lattice gauge theory. Their use will be discussed for the cases of the Higgs effect, high-baryon density color superconductors, and BRST symmetry.

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