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10 papers found.
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Fermion masses and mixings and dark matter constraints in a model with radiative seesaw mechanism

Abstract We formulate a predictive model of fermion masses and mixings based on a Δ(27) family symmetry. In the quark sector the model leads to the viable mixing inspired texture where the Cabibbo angle comes from the down quark sector and the other angles come from both up and down quark sectors. In the lepton sector the model generates a predictive structure for charged leptons...

A novel and economical explanation for SM fermion masses and mixings

I propose the first multiscalar singlet extension of the standard model (SM), which generates tree level top quark and exotic fermion masses as well as one and three loop level masses for charged fermions lighter than the top quark and for light active neutrinos, respectively, without invoking electrically charged scalar fields. That model, which is based on the \(S_{3}\times Z_...

Radiative seesaw-type mechanism of fermion masses and non-trivial quark mixing

We propose a predictive inert two-Higgs doublet model, where the standard model (SM) symmetry is extended by \(S_{3}\otimes Z_{2}\otimes Z_{12}\) and the field content is enlarged by extra scalar fields, charged exotic fermions and two heavy right-handed Majorana neutrinos. The charged exotic fermions generate a non-trivial quark mixing and provide one-loop-level masses for the...

Predictive Pati-Salam theory of fermion masses and mixing

We propose a Pati-Salam extension of the standard model incorporating a flavor symmetry based on the Δ (27) group. The theory realizes a realistic Froggatt-Nielsen picture of quark mixing and a predictive pattern of neutrino oscillations. We find that, for normal neutrino mass ordering, the atmospheric angle must lie in the higher octant, CP must be violated in oscillations, and...

Radiatively generated hierarchy of lepton and quark masses

We propose a model for radiatively generating the hierarchy of the Standard Model (SM) fermion masses: tree-level top quark mass; 1-loop bottom, charm, tau and muon masses; 2-loop masses for the light up, down and strange quarks as well as for the electron; and 4-loop masses for the light active neutrinos. Our model is based on a softlybroken S 3 × Z 2 discrete symmetry. Its...

LHC diphoton resonance at \(750\,\text {GeV}\) as an indication of \(SU(3)_L\times U(1)_X\) electroweak symmetry

Eur. Phys. J. C LHC diphoton resonance at 750 GeV as an indication of SU (3)L × U (1) X electroweak symmetry A. E. Cárcamo Hernández 1 Ivan Nišandžic´ 0 0 Institut für Physik, Technische

Fermion masses and mixings in the 3-3-1 model with right-handed neutrinos based on the \(S_3\) flavor symmetry

. arXiv: 1411 .2913 [hep-ph] 29. A. E. Cárcamo Hernández , I. de Medeiros Varzielas , J. Phys . G 42 ( 6 ), 065002 ( 2015 ). doi:10.1088/ 0954 - 3899 /42/6/065002. arXiv: 1410 .2481 [hep-ph] 30. H. Nishiura

A 3-3-1 model with right-handed neutrinos based on the \(\varDelta \left( 27\right) \) family symmetry

We present the first multiscalar singlet extension of the original 3-3-1 model with right-handed neutrinos, based on the \(\Delta \left( 27\right) \) family symmetry, supplemented by the \(Z_{4}\otimes Z_{8}\otimes Z_{14}\) flavor group, consistent with current low energy fermion flavor data. In the model under consideration, the light active neutrino masses are generated from a...

\(S_3\) discrete group as a source of the quark mass and mixing pattern in \(331\) models

We propose a model based on the \({SU}(3)_{C}\otimes SU(3)_{L}\otimes U(1)_{X}\) gauge symmetry with an extra \(S_{3}\otimes Z_{2}\otimes Z_{4}\otimes Z_{12}\) discrete group, which successfully accounts for the SM quark mass and mixing pattern. The observed hierarchy of the SM quark masses and quark mixing matrix elements arises from the \(Z_{4}\) and \(Z_{12}\) symmetries...

The effect of composite resonances on Higgs decay into two photons

In scenarios of strongly coupled electroweak symmetry breaking, heavy composite particles of different spin and parity may arise and cause observable effects on signals that appear at loop levels. The recently observed process of Higgs to \(\gamma \gamma \) at the LHC is one of such signals. We study the new constraints that are imposed on composite models from \(H\rightarrow...