scholarly journals Testing a dynamical origin of standard model fermion masses

2016 ◽  
Vol 94 (7) ◽  
Author(s):  
Tommi Alanne ◽  
Mads T. Frandsen ◽  
Diogo Buarque Franzosi
Keyword(s):  
Standard Model ◽  
Standard Model Fermion ◽  
Fermion Masses ◽  
Dynamical Origin

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.

scholarly journals A road towards a beyond the Standard Model model

2022 ◽  
Vol 258 ◽  
pp. 06003
Author(s):  
Giancarlo Rossi
Keyword(s):  
Standard Model ◽  
Chiral Symmetry ◽  
Top Quark ◽  
Gauge Coupling ◽  
Spontaneous Breaking ◽  
Strong Interactions ◽  
Fermion Mass ◽  
Mass Hierarchy ◽  
Strongly Interacting ◽  
Fermion Masses

In this talk we describe examples of renormalizable strongly interacting field theories where chiral symmetry, broken at the UV cutoff by the presence of some irrelevant d > 4 operators in the fundamental Lagrangian, is recovered at low energy owing to the tuning of certain Lagrangian parameters. The interference of UV effects with IR features coming from the spontaneous breaking of the recovered chiral symmetry yields non perturbatively generated elementary fermion masses parametrically expressed by formulae of the kind mq ~ Cq(α)ΛRGI with α the gauge coupling constant and ΛRGI the RGI scale of the theory. Upon introducing EW interactions, this mechanism can be extended to give mass to EW bosons and leptons and can thus be used as an alternative to the Higgs scenario. In order to give the top quark and the weak gauge bosons a mass of the phenomenologically correct order of magnitude, the model must necessarily include (yet unobserved) super-strongly interacting massive fermions endowed, besides ordinary Standard Model interactions, with super-strong interactions with a RGI scale, ΛT ΛQCD in the few TeV range. Though limited in its scope (here we ignore hypercharge and leptons and discuss only the case of one family neglecting weak isospin splitting), the model opens the way to a solution of the naturalness problem and an understanding of the fermion mass hierarchy.

scholarly journals B-anomalies in U(2) flavor symmetry

2020 ◽  
Vol 234 ◽  
pp. 01017
Author(s):  
Kei Yamamoto
Keyword(s):  
Standard Model ◽  
General Assumption ◽  
Flavor Symmetry ◽  
General Hypothesis ◽  
Lepton Flavor ◽  
The Standard Model ◽  
Future Data ◽  
Yukawa Sector ◽  
Dynamical Origin

We analyzed how to test flavor and helicity structures of the corresponding amplitudes in view of future data, motivated by the recent hints of lepton flavor universality violation observed in semileptonic B decays. The general assumption that non-standard effects are controlled by a U(2)5 flavor symmetry, minimally broken as in the Standard Model Yukawa sector, leads to stringent predictions on leptonic and semileptonic B decays. Future measurements will allow to prove or falsify this general hypothesis independently of its dynamical origin.

scholarly journals CKM matrix and fermion masses in the dualized standard model

1998 ◽  
Vol 58 (1) ◽  
Author(s):  
José Bordes ◽  
Chan Hong-Mo ◽  
Jacqueline Faridani ◽  
Jakov Pfaudler ◽  
Tsou Sheung Tsun
Keyword(s):  
Standard Model ◽  
Ckm Matrix ◽  
Fermion Masses

scholarly journals Updates to the dualized standard model on fermion masses and mixings

2003 ◽  
Vol 30 (1) ◽  
pp. 51-54
Author(s):  
J. Bordes ◽  
Chan Hong-Mo ◽  
Tsou Sheung Tsun
Keyword(s):  
Standard Model ◽  
Fermion Masses
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