Low energy properties of the heavy vector fermions and electroweak symmetry breaking

1995 ◽  
Vol 51 (1) ◽  
pp. 251-259 ◽  
Author(s):  
Hanqing Zheng
Keyword(s):  
Symmetry Breaking ◽  
Electroweak Symmetry Breaking ◽  
Low Energy ◽  
Electroweak Symmetry

scholarly journals Low-energy signals of strongly-coupled electroweak symmetry-breaking scenarios

2016 ◽  
Vol 93 (5) ◽  
Author(s):  
Antonio Pich ◽  
Ignasi Rosell ◽  
Joaquín Santos ◽  
Juan José Sanz-Cillero
Keyword(s):  
Symmetry Breaking ◽  
Electroweak Symmetry Breaking ◽  
Low Energy ◽  
Electroweak Symmetry ◽  
Strongly Coupled

CHARGE-1/2 FERMIONS AND THE SU(4) COLOR MODEL

1992 ◽  
Vol 07 (15) ◽  
pp. 1315-1323 ◽  
Author(s):  
ROBERT FOOT ◽  
OSCAR F. HERNÁNDEZ
Keyword(s):  
Symmetry Breaking ◽  
Mass Range ◽  
Electroweak Symmetry Breaking ◽  
Low Energy ◽  
Color Model ◽  
Electroweak Symmetry ◽  
The Standard Model ◽  
Energy Theory ◽  
Electrically Charged ◽  
Breaking Scale

The SU(4) color models represent possible alternatives to the standard model. These theories replace the color gauge group SU(3) c by SU(4) c . The SU(4) c symmetry is assumed to be broken which leads to the SM as the effective low energy theory. An interesting feature of these theories is that the SU(4) symmetry breaking scale can be very low, and may be approximately at the same scale as the electroweak symmetry breaking. These models imply the existence of exotic electrically charged ±1/2 fermions. We examine various SU(4) c models to explore the circumstances under which these models can have the exotic charged fermions in the interesting mass range m≳100 GeV .

scholarly journals DEVIATIONS FROM LOW-ENERGY THEOREM FOR VLVL SCATTERING DUE TO PSEUDO-GOLDSTONE BOSONS

1998 ◽  
Vol 13 (38) ◽  
pp. 3045-3061
Author(s):  
TOMÁS BAHNÍK ◽  
JIŘÍ HOŘEJSÍ
Keyword(s):  
Symmetry Breaking ◽  
Symmetric Space ◽  
Vector Boson ◽  
Goldstone Boson ◽  
Electroweak Symmetry Breaking ◽  
Low Energy ◽  
Tree Level ◽  
Electroweak Symmetry ◽  
Goldstone Bosons ◽  
Vector Bosons

Possible deviations from a low-energy theorem for the scattering of strongly interacting longitudinally polarized W and Z bosons are discussed within a particular scheme of electroweak symmetry breaking. The scheme (suggested earlier by other authors in a slightly different context) is based on spontaneous breakdown of an SU(4) symmetry to custodial SU(2) subgroup. The physical spectrum of such a model contains a set of relatively light pseudo-Goldstone bosons whose interactions with vector bosons modify the low-energy theorem proven for a "minimal" symmetry-breaking sector The Goldstone-boson manifold SU(4)/SU(2) is not a symmetric space. In this context it is observed that, on the other hand, there is a large class of models of electroweak symmetry breaking, involving groups G and H such that the G/H is a symmetric space and the corresponding rich multiplets of pseudo-Goldstone bosons do not influence the canonical low-energy theorem. For the scheme considered here, the relevant interactions are described in terms of an effective chiral Lagrangian and tree-level contributions of the pseudo-Goldstone boson exchanges to the vector boson scattering are computed explicitly. A comparison with the standard model is made.

scholarly journals ELECTROWEAK SYMMETRY BREAKING DUE TO CONFINEMENT

2000 ◽  
Vol 15 (08) ◽  
pp. 525-530 ◽  
Author(s):  
CHUN LIU
Keyword(s):  
Symmetry Breaking ◽  
Supersymmetry Breaking ◽  
Electroweak Symmetry Breaking ◽  
Low Energy ◽  
Electroweak Symmetry ◽  
Yang Mills ◽  
Effective Description

Within the framework of gauge mediated supersymmetry breaking, we consider an electroweak symmetry breaking pattern in which there is no conventional μ term. The pattern is made appealing through realizing it as low energy effective description of a supersymmetric Yang–Mills theory which is of confinement. Phenomenological implications are discussed.

scholarly journals Dark matter spectra from the electroweak to the Planck scale

2021 ◽  
Vol 2021 (6) ◽  
Author(s):  
Christian W. Bauer ◽  
Nicholas L. Rodd ◽  
Bryan R. Webber
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Symmetry Breaking ◽  
Planck Scale ◽  
Electroweak Symmetry Breaking ◽  
Indirect Detection ◽  
Electroweak Symmetry ◽  
Stable States ◽  
Decay Spectrum ◽  
Crucial Ingredient

Abstract We compute the decay spectrum for dark matter (DM) with masses above the scale of electroweak symmetry breaking, all the way to the Planck scale. For an arbitrary hard process involving a decay to the unbroken standard model, we determine the prompt distribution of stable states including photons, neutrinos, positrons, and antiprotons. These spectra are a crucial ingredient in the search for DM via indirect detection at the highest energies as being probed in current and upcoming experiments including IceCube, HAWC, CTA, and LHAASO. Our approach improves considerably on existing methods, for instance, we include all relevant electroweak interactions.

scholarly journals ANOMALOUS U(1)A AND ELECTROWEAK SYMMETRY BREAKING

2001 ◽  
Vol 16 (13) ◽  
pp. 835-844
Author(s):  
ILIA GOGOLADZE ◽  
MIRIAN TSULAIA
Keyword(s):  
Gauge Symmetry ◽  
Standard Model ◽  
Symmetry Breaking ◽  
Supersymmetric Standard Model ◽  
Electroweak Symmetry Breaking ◽  
Electroweak Symmetry ◽  
Superstring Theory

We suggest a new mechanism for electroweak symmetry breaking in the supersymmetric Standard Model. Our suggestion is based on the presence of an anomalous U (1)A gauge symmetry, which naturally arises in the four-dimensional superstring theory, and heavily relies on the value of the corresponding Fayet–Illiopoulos ξ-term.

scholarly journals Dynamical electroweak symmetry breaking in the model of electroweak-scale right-handed neutrinos

2016 ◽  
Vol 31 (11) ◽  
pp. 1650065
Author(s):  
Pham Quang Hung ◽  
Nguyen Nhu Le
Keyword(s):  
Symmetry Breaking ◽  
Higgs Doublet ◽  
Higgs Mechanism ◽  
Electroweak Symmetry Breaking ◽  
Electroweak Symmetry ◽  
Electroweak Scale ◽  
Text Model ◽  
The Rich ◽  
Higgs Fields

We present the Higgs mechanism in the context of the EW-scale [Formula: see text] model in which electroweak symmetry is dynamically broken by condensates of mirror quark and right-handed neutrino through the exchange of one fundamental Higgs doublet and one fundamental Higgs triplet, respectively. The formation of these condensates is dynamically investigated by using the Schwinger–Dyson approach. The occurrence of these condensates will give rise to the rich Higgs spectrum. In addition, the VEVs of Higgs fields is also discussed in this dynamical phenomenon.

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