scholarly journals TRACING THE GAUGE ORIGIN OF YUKAWA AND HIGGS PARAMETERS BEYOND THE STANDARD MODEL

2005 ◽  
Vol 20 (31) ◽  
pp. 2397-2408 ◽  
Author(s):  
J. LORENZO DÍAZ-CRUZ
Keyword(s):  
Standard Model ◽  
Gauge Field ◽  
Beyond The Standard Model ◽  
Third Generation ◽  
Five Dimensions ◽  
Mixing Angles ◽  
Fundamental Interactions ◽  
The Third ◽  
The Standard Model ◽  
Gauge Couplings

We discuss possible realizations of the hypothesis that all the fundamental interactions of the elementary particles should be of gauge type, including the Yukawa and Higgs ones. In the minimal SUSY extension of the standard model, where the quartic Higgs couplings are "gauged" through the D-terms, it is also possible to generate radiatively the Yukawa matrices for the light generations, thus expressing them as functions of gauge couplings. The program can also be applied to the SUSY LR model, where the possibility to induce radiatively the mixing angles, can help to make viable the parity solution to the strong CP problem. The superpotential of the model still includes some non-gauge couplings, namely, the Yukawa constants for the third generation and the trilinear terms λχ L Φχ R and [Formula: see text], involving the Higgs bi-doublet (Φ) and two pairs of doublets (χ L , χ R and their conjugates). Additional progress to relate these parameters to gauge couplings, can be made by embedding the LR model within a SUSY model SU (4)W× U (1)B-L in five dimensions, where the Higgs bi-doublet is identified as the extra component of the 5D gauge field.

The Triple Anomalous Gauge Couplings Investigation on Linear eγ-Collider

2019 ◽  
Vol 22 (4) ◽  
pp. 318-329 ◽  
Author(s):  
I. A. Shershan Shershan ◽  
T. V. Shishkina Shishkina
Keyword(s):  
Standard Model ◽  
Gauge Boson ◽  
Cross Sections ◽  
High Energy ◽  
Beyond The Standard Model ◽  
Leading Order ◽  
Effective Lagrangian ◽  
The Standard Model ◽  
Gauge Couplings ◽  
Electron Photon

The differential and total cross sections of the single gauge boson production in quasielastic high energy electron-photon scattering are obtained within the Standard Model in leading order and next-to-leading order of the perturbative theory. The contribution of divergent part of hard photon bremsstrahlung was included. The anomalous gauge boson coupling in the effective Lagrangian approach were studied. It is shown the analysis of neutral gauge couplings can be fully performed for two constants with different types of symmetries. Numerical analysis has been done. The best conditions were determined for registration of generated effects beyond the Standard Model.

Amending the Standard Model of Particle Physics

2004 ◽  
Vol 19 (supp01) ◽  
pp. 167-180 ◽  
Author(s):  
Maurice Goldhaber
Keyword(s):  
Standard Model ◽  
Particle Physics ◽  
Point Sources ◽  
Third Generation ◽  
Mass Eigenstates ◽  
The Third ◽  
Finite Source ◽  
The Standard Model ◽  
Tentative Explanation ◽  
Dimensionality Of Space

Some of my earlier arguments, suggesting modifications of the Standard Model of Particle Physics (see ref. 1), are elaborated and extended. Rules deduced from the known properties of elementary fermions are sharpened and extended in the first part. Conclusions drawn from the rules in the second part are also honed and expanded and an estimate of the neutrino mass eigenstates is added. In the third part, a tentative explanation of the rules is discussed. In my earlier paper, I suggested replacing the point-sources postulated by the Standard Model for each generation by finite 'source-shapes', equal for all elementary fermions of a generation and systematically decreasing in volume from the first to the third generation, thus increasing the effect of self-interactions. According to the rules a correlation exists between the mass of an elementary fermion and the strength of its self-interaction, thus an increase in self-interactions would resolve the problem of the hierarchical masses. A possible connection between the existence of only three generations and the three-dimensionality of space also is discussed. In the epilogue the question is explored whether finite source-shapes for the elementary fermions can be reconciled with fundamental theoretical tenets.

scholarly journals Yukawa coupling unification in an SO(10) model consistent with Fermilab (g − 2)μ result

2021 ◽  
Vol 2021 (6) ◽  
Author(s):  
Amin Aboubrahim ◽  
Pran Nath ◽  
Raza M. Syed
Keyword(s):  
Neural Network ◽  
Standard Model ◽  
Parameter Space ◽  
Yukawa Coupling ◽  
High Energy ◽  
Recent Analysis ◽  
Third Generation ◽  
High Luminosity ◽  
The Third ◽  
The Standard Model

Abstract We investigate the Yukawa coupling unification for the third generation in a class of SO(10) unified models which are consistent with the 4.2 σ deviation from the standard model of the muon g − 2 seen by the Fermilab experiment E989. A recent analysis in supergravity grand unified models shows that such an effect can arise from supersymmetric loops correction. Using a neural network, we further analyze regions of the parameter space where Yukawa coupling unification consistent with the Fermilab result can appear. In the analysis we take into account the contributions to Yukawas from the cubic and the quartic interactions. We test the model at the high luminosity and high energy LHC and estimate the integrated luminosities needed to discover sparticles predicted by the model.

scholarly journals On one-loop corrections to the CPT-even Lorentz-breaking extension of QED

2018 ◽  
Vol 33 (02) ◽  
pp. 1850018 ◽  
Author(s):  
T. Mariz ◽  
R. V. Maluf ◽  
J. R. Nascimento ◽  
A. Yu. Petrov
Keyword(s):  
Standard Model ◽  
Gauge Field ◽  
Quantum Electrodynamics ◽  
Renormalization Scheme ◽  
Standard Model Extension ◽  
Third Order ◽  
The Third ◽  
Model Extension ◽  
The Standard Model ◽  
Tensor Formula

In this paper, we describe the quantum electrodynamics added by Lorentz-violating CPT-even terms in the context of the standard model extension. We focus our attention on the fermion sector, represented by the CPT-even symmetric Lorentz-breaking tensor [Formula: see text]. We adopt a generic form that parametrizes the components of [Formula: see text] in terms of one four-vector, namely, [Formula: see text]. We then generate perturbatively, up to the third order in this tensor, the aether-like term for the gauge field. Finally, we discuss the renormalization scheme for the gauge propagator, by taking into account [Formula: see text] traceless [Formula: see text] and, trivially, [Formula: see text] [Formula: see text].

scholarly journals Naturalising the third family hypercharge model for neutral current $$B{-}\hbox {anomalies}$$

2019 ◽  
Vol 79 (11) ◽  
Author(s):  
B. C. Allanach ◽  
Joe Davighi
Keyword(s):  
Gauge Symmetry ◽  
Standard Model ◽  
Neutral Current ◽  
Beyond The Standard Model ◽  
Yukawa Couplings ◽  
The Third ◽  
Standard Model Contribution ◽  
The Standard Model ◽  
Model Predictions ◽  
Flavour Violation

Abstract We consider a deformation of the Third Family Hypercharge Model, which arguably makes the model more natural. Additional non-zero charges of the spontaneously broken, family-dependent $$U(1)_F$$U(1)F gauge symmetry are assigned to the second family leptons, and the third family leptons’ charges are deformed away from their hypercharges in such a way that the $$U(1)_F$$U(1)F gauge symmetry remains anomaly-free. Second family $$U(1)_F$$U(1)F lepton charges allow a $$Z^\prime $$Z′ coupling to muons without having to assume large charged lepton mixing, which risks violating tight lepton flavour violation bounds. In this deformed version, only the bottom and top Yukawa couplings are generated at the renormalisable level, whereas the tauon Yukawa coupling is absent. The $$Z^\prime $$Z′ mediates a beyond the Standard Model contribution to an effective $$({\bar{b}} s) (\bar{\mu }\mu )$$(b¯s)(μ¯μ) vertex in the combination $$C_9=-9C_{10}$$C9=-9C10 and is able to fit the apparent discrepancy between Standard Model predictions in flavour changing neutral-current $$B-$$B-meson decays and their measurements, whilst simultaneously avoiding current constraints from direct $$Z^\prime $$Z′ searches and other measurements, when $$0.8~\text {TeV}< M_{Z^\prime } < 12.5 ~\text {TeV}$$0.8TeV<MZ′<12.5TeV.

scholarly journals Inclusive searches for squarks and gluinos with the ATLAS detector

2018 ◽  
Vol 182 ◽  
pp. 02001
Author(s):  
S. Adachi
Keyword(s):  
Standard Model ◽  
Standard Model Prediction ◽  
Theoretical Models ◽  
Atlas Detector ◽  
Beyond The Standard Model ◽  
Third Generation ◽  
Final States ◽  
Missing Transverse Momentum ◽  
The Standard Model ◽  
Generation Squarks

Despite the absence of experimental evidence, the weak scale supersymmetry remains as one of the best motivated and studied theoretical models beyond the Standard Model. This article summarises recent ATLAS results on inclusive searches for squarks and gluinos in R-parity conserving SUSY scenarios, including third generation squarks produced in the decay of gluinos. The searches involve final states containing jets, missing transverse momentum with and without a light lepton. No significance excess above the Standard Model prediction is observed and exclusion limits are set on 2-dimensional mass planes of benchmark signal models.

Beyond the Standard Model

2017 ◽  
Author(s):  
Laurent Baulieu ◽  
John Iliopoulos ◽  
Roland Sénéor
Keyword(s):  
Field Theory ◽  
General Relativity ◽  
Supergravity Models ◽  
Standard Model ◽  
Field Theories ◽  
Beyond The Standard Model ◽  
Super Symmetry ◽  
The Standard Model ◽  
Topological Field ◽  
Supersymmetric Theories

The motivation for supersymmetry. The algebra, the superspace, and the representations. Field theory models and the non-renormalisation theorems. Spontaneous and explicit breaking of super-symmetry. The generalisation of the Montonen–Olive duality conjecture in supersymmetric theories. The remarkable properties of extended supersymmetric theories. A brief discussion of twisted supersymmetry in connection with topological field theories. Attempts to build a supersymmetric extention of the standard model and its experimental consequences. The property of gauge supersymmetry to include general relativity and the supergravity models.

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