Phenomenological aspects of the exotic T quark in 331 models

Cabarcas, J. M.; Dumm, D. Gómez; Martı́nez, R.

doi:10.1140/epjc/s10052-008-0803-3

Cited by 21 publications

(12 citation statements)

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“…It should be noted that the electric charges of the J 1 and J i quarks are +5/3 and −4/3, respectively, making them exotic quarks. The phenomenology of these exotics has been explored in [44].…”

Section: Fermionsmentioning

confidence: 99%

The muon anomalous magnetic moment in the reduced minimal 3-3-1 model

Kelso

Pinheiro²,

Queiroz

et al. 2014

Eur. Phys. J. C

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We study the muon anomalous magnetic moment (g − 2) μ in the context of the reduced minimal 3-3-1 model recently proposed in the literature. In particular, its spectrum contains a doubly charged scalar (H ±± ) and gauge boson (U ±± ), new singly charged vectors (V ± ) and a Z boson, each of which might give a sizeable contribution to the (g − 2) μ . We compute the 1-loop contributions from all these new particles to the (g − 2) μ . We conclude that the doubly charged vector boson provides the dominant contribution, and by comparing our results with the experimental constraints we derive an expected value for the scale of SU(3) L ⊗ U (1) N symmetry breaking v χ ∼ 2 TeV. We also note that, if the discrepancy in the anomalous moment is resolved in the future without this model then the constraints will tighten to requiring v χ 3.7 TeV with current precision, and they will entirely rule out the model if the expected precision is achieved by the future experiment at Fermilab.

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Section: Fermionsmentioning

confidence: 99%

The muon anomalous magnetic moment in the reduced minimal 3-3-1 model

Kelso

Pinheiro²,

Queiroz

et al. 2014

Eur. Phys. J. C

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“…In addition, under the assumption that the exotic T , J 1 and J 2 quarks are lighter than the H 0 2 and H 0 2 neutral Higgs bosons, our model predicts the absence of the flavor changing neutral exotic quark decays, which implies that they can be searched at the LHC via their decay into the SM quarks and the intermediate states of heavy gauge bosons, which in turn decay into the pairs of the SM fermions; see e.g. [228]. Possible directions for future work along these lines would be to study the constraints on the heavy charged gauge boson masses in our model arising from the upper bound on the branching fraction for the flavor changing top quark decays, the oblique parameters, the Zbb vertex and the Higgs diphoton signal strength.…”

Section: Discussionmentioning

confidence: 83%

“…After being pair produced they will decay into the SM quarks and the intermediate states of heavy gauge bosons, which in turn decay into the pairs of the SM fermions; see e.g. [228]. The precise signature of the decays of the exotic quarks depends on details of the spectrum and other parameters of the model.…”

Section: Quark Masses and Mixingmentioning

confidence: 99%

Fermion masses and mixings in the 3-3-1 model with right-handed neutrinos based on the $$S_3$$ S 3 flavor symmetry

2016

Self Cite

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We propose a 3-3-1 model where the SU (3) C ⊗ SU (3) L ⊗ U (1) X symmetry is extended by S 3 ⊗ Z 3 ⊗ Z 3 ⊗ Z 8 ⊗ Z 16 and the scalar spectrum is enlarged by extra SU (3) L singlet scalar fields. The model successfully describes the observed SM fermion mass and mixing pattern. In this framework, the light active neutrino masses arise via an inverse seesaw mechanism and the observed charged fermion mass and quark mixing hierarchy is a consequence of the Z 3 ⊗ Z 3 ⊗ Z 8 ⊗ Z 16 symmetry breaking at very high energy. The obtained physical observables for both quark and lepton sectors are compatible with their experimental values. The model predicts the effective Majorana neutrino mass parameter of neutrinoless double beta decay to be m ββ = 4 and 48 meV for the normal and the inverted neutrino spectra, respectively. Furthermore, we found a leptonic Dirac CPviolating phase close to π 2 and a Jarlskog invariant close to about 3 × 10 −2 for both normal and inverted neutrino mass hierarchy.

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“…After being pair produced they will decay into the standard fermions and the intermediate states of heavy gauge bosons, which in turn decay into the pairs of the standard fermions; see e.g. [92]. The precise signature of the decays of the vector-like fermions depends on details of the spectrum and other parameters of the model.…”

Section: The Resonance At 750 Gevmentioning

confidence: 99%

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

Hernández

Nišandžić

2016

Eur. Phys. J. C

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The LHC collaborations ATLAS and CMS recently reported on the excess of the events in the diphoton final states at the invariant mass of about 750 GeV. In this article we speculate on the possibility that the excess arises from the neutral CP-even component φ of the scalar triplet of themodel that has a U (1) X charge equal to X = −1/3 and acquires a vacuum expectation value larger than the electroweak symmetry breaking scale. The interactions of the scalar field φ with the photon and gluon pairs are mediated by the virtual vector-like fermions which appear as components of the anomaly-free chiral fermion representations of the 3−3−1 gauge group.

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Phenomenological aspects of the exotic T quark in 331 models

Cited by 21 publications

References 50 publications

The muon anomalous magnetic moment in the reduced minimal 3-3-1 model

The muon anomalous magnetic moment in the reduced minimal 3-3-1 model

Fermion masses and mixings in the 3-3-1 model with right-handed neutrinos based on the $$S_3$$ S 3 flavor symmetry

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

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