LHC diphoton resonance from gauge symmetry

Boucenna, Sofiane M.; Morisi, Stefano; Vicente, Avelino

doi:10.1103/physrevd.93.115008

Cited by 43 publications

(16 citation statements)

References 63 publications

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“…Finally, versions with heavy sterile neutrinos include cold dark matter candidates as weakly interacting massive particles (WIMPs) [166]. Besides that, the 3-3-1 models can explain the 750 GeV diphoton excess recently reported by ATLAS and CMS [167][168][169][170] as well as the 2 TeV diboson excess found by ATLAS [171].…”

Section: Introductionmentioning

confidence: 96%

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

2016

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We present the first multiscalar singlet extension of the original 3-3-1 model with right-handed neutrinos, based on the (27) family symmetry, supplemented by the Z 4 ⊗ Z 8 ⊗ 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 double seesaw mechanism and the observed pattern of charged fermion masses and quark mixing angles is caused by the breaking of the Δ (27) ⊗ Z 4 ⊗ Z 8 ⊗ Z 14 discrete group at very high energy. Our model has only 14 effective free parameters, which are fitted to reproduce the experimental values of the 18 physical observables in the quark and lepton sectors. The obtained physical observables for the quark sector agree with their experimental values, whereas those for the lepton sector also do, only for the inverted neutrino mass hierarchy. The normal neutrino mass hierarchy scenario of the model is disfavored by the neutrino oscillation experimental data. We find an effective Majorana neutrino mass parameter of neutrinoless double beta decay of m ββ = 22 meV, a leptonic Dirac CP violating phase of 34 • , and a Jarlskog invariant of about 10 −2 for the inverted neutrino mass spectrum.

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Section: Introductionmentioning

confidence: 96%

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

2016

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“…Concerning models with an extended gauge symmetry, those based on the gauge symmetry SU(3) c × SU(3) L × U(1) X , also called 3-3-1 models, which introduce a family nonuniversal U(1) X symmetry [95][96][97][98][99][100][101][102][103][104][105][106], can provide an explanation for the origin of the family structure of the fermions. These models have the following phenomenological advantages: (i) The three family structure in the fermion sector can be understood in the 3-3-1 models from the cancellation of chiral anomalies and asymptotic freedom in QCD.…”

Section: Introductionmentioning

confidence: 99%

A variant of 3-3-1 model for the generation of the SM fermion mass and mixing pattern

Hernández

Kovalenko

Long

et al. 2018

J. High Energ. Phys.

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Abstract:We propose an extension of the 3-3-1 model with an additional symmetry group Z 2 × Z 4 × U(1) Lg and an extended scalar sector. To our best knowledge this is the first example of a renormalizable 3-3-1 model, which allows explanation the SM fermion mass hierarchy by a sequential loop suppression: tree-level top and exotic fermion masses, 1-loop bottom, charm, tau and muon masses; 2-loop masses for the light up, down, strange quarks as well as for the electron. The light active neutrino masses are generated from a combination of linear and inverse seesaw mechanisms at two loop level. The model also has viable fermionic and scalar dark matter candidates.

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“…In this work, we extend this scenario to include the next lowest SU (2) L electroweak representation with these properties: A pseudoscalar tripletΠ ∼ (π 0 ,π ± ) furnishing the of spontaneous EWSB, this scenario is intrinsically different from models where the neutral component of an SU (2) L doublet is responsible for the diphoton excess [6,16,20,21,[23][24][25], as well as from left-right symmetric approaches to the diphoton excess [26][27][28][29][30][31][32] or GeorgiMachacek models [33,34], in which an EW triplet acquires a vev, and from extensions of SU (2) L [35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Diphotons from electroweak triplet-singlet mixing

2016

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The neutral component of a real pseudoscalar electroweak (EW) triplet can produce a diphoton excess at 750 GeV, if it is somewhat mixed with an EW singlet pseudoscalar. This triplet-singlet mixing allows for greater freedom in the diboson branching ratios than the singlet-only case, but it is still possible to probe the parameter space extensively with 300 fb −1 . The charged component of the triplet is pair-produced at the LHC, which results in a striking signal in the form of a pair of W γ resonances with an irreducible rate of 0.27 fb. Other signatures include multiboson final states from cascade decays of the triplet-singlet neutral states. A large class of composite models feature both EW singlet and triplet pseudo-Nambu Goldstone bosons in their spectrum, with the diboson couplings generated by axial anomalies.

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LHC diphoton resonance from gauge symmetry

Cited by 43 publications

References 63 publications

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

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

A variant of 3-3-1 model for the generation of the SM fermion mass and mixing pattern

Diphotons from electroweak triplet-singlet mixing

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