Probing 3-3-1 models in diphoton Higgs boson decay

Alves, Alexandre; Barreto, E. Ramirez; Dias, Alex G.; Pires, C. A. de S.; Queiroz, Farinaldo S.; Silva, P. S. Rodrigues da

doi:10.1103/physrevd.84.115004

Cited by 60 publications

(40 citation statements)

References 69 publications

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“…Other explorations of trying to understand the observed Higgs to di-photon rate can be found in Refs. [28]. Interestingly, the gauged U (1) PQ scenario contains the exotics which can enhance the hγγ coupling.…”

Section: I Introductionmentioning

confidence: 99%

125 GeV Higgs boson, enhanced diphoton rate, and gaugedU(1)PQ-extended MSSM

Liu

Wang

2012

Phys. Rev. D

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The ATLAS and CMS collaborations have announced discovery of a ∼ 125 GeV Higgs boson, after a combined analysis of the di-photon and ZZ search channels. This observation has significant impact on low-energy supersymmetry. First, some fine-tuning is necessary to accommodate such a Higgs mass in the Minimal Supersymmetric Standard Model (MSSM) because the tree-level mass of the SM-like Higgs boson in the MSSM is relatively small. We study the possibility of lifting the mass of the SM-like Higgs boson by non-decoupling D-term from an additional U (1) gauge symmetry. In particular, we focus on a gauged Peccei-Quinn symmetry which can also be related to a possible solution of the µ problem in the MSSM. In addition to the measurement of the mass of the Higgs, the data also reveals a tantalizing hint of a significantly enhanced di-photon signal rate, 1.56 ± 0.43 and 1.9 ± 0.5 times of the SM prediction in the CMS and ATLAS experiments, respectively. We demonstrate that such an enhancement can be accommodated in this MSSM extension. Anomaly cancellation requires the introduction of charged exotics. If some of them happen to be light and have sizable coupling to the SM-like Higgs boson, the di-photon signal rate can be enhanced significantly. EW precision measurements provide stringent constraints on this model. Taking these into account, we identify two benchmark scenarios. We argue that they are representative of large classes of viable models beyond our current example which can consistently enhance the Higgs to di-photon rate. We also comment on possible signals of such light exotics at the LHC.

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Section: I Introductionmentioning

confidence: 99%

125 GeV Higgs boson, enhanced diphoton rate, and gaugedU(1)PQ-extended MSSM

Liu

Wang

2012

Phys. Rev. D

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“…Due to the enlarged gauge symmetry, the fermionic generations are accommodated in the fundamental representation of SU (3) L , i.e triplets. Since the SM spectrum should be reproduced, the triplet must contain the SM doublet, but the arbitrariness of the third component leads to a multitude of models based on this gauge symmetry [206,229,230,[414][415][416][417][418][419][420][421][422][423][424][425][426][427][428][429][430][431][432].…”

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confidence: 99%

A call for new physics: The muon anomalous magnetic moment and lepton flavor violation

2018

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We review how the muon anomalous magnetic moment (g − 2) and the quest for lepton flavor violation are intimately correlated. Indeed the decay µ → eγ is induced by the same amplitude for different choices of in-and outgoing leptons. In this work, we try to address some intriguing questions such as:Which hierarchy in the charged lepton sector one should have in order to reconcile possible signals coming simultaneously from g − 2 and lepton flavor violation?What can we learn if the g − 2 anomaly is confirmed by the upcoming flagship experiments at FERMILAB and J-PARC, and no signal is seen in the decay µ → eγ in the foreseeable future? On the other hand, if the µ → eγ decay is seen in the upcoming years, do we need to necessarily observe a signal also in g − 2?.In this attempt, we generally study the correlation between these observables in a detailed analysis of simplified models. We derive master integrals and

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“…Apart from some works considering the Higgs phenomenology (Alves et al, 2011), we have constraint on the Z0 mass being abobe 2TeV (Coutinho et al, 2013) and some phenomenological aspects considering charged scalar production (Cogollo et al, 2014).…”

Section: Resultsmentioning

confidence: 99%

Neutrino Mass Mechanisms in 3-3-1 Models: A Short Review

Pires¹

2015

Physics International

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In this study we review some mechanisms that provide light neutrinos in the framework of 3-3-1 gauge models without exotic leptons. In regard to the minimal 3-3-1 model, we call the attention to the fact that the perturbative regime of the model goes until 5 TeV. This requires alternative mechanisms in order to generate light neutrinos. In this review we discuss two mechanisms capable of generating light neutrinos in the framework of the minimal 3-3-1 model. In regard to the 3-3-1 model with right-handed neutrinos, we call the attention to the fact that in it mechanisms that generate light left-handed neutrinos also generate light right-handed neutrinos. Finally, we call the attention to the fact that the 3-3-1 model with right-handed neutrinos accommodate naturally the inverse seesaw mechanism.

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Probing 3-3-1 models in diphoton Higgs boson decay

Abstract: We investigate the Higgs boson production through gluon fusion and its decay into two photons at the LHC in the context of the minimal 3-3-1 model and its alternative version with exotic leptons.

Cited by 60 publications

References 69 publications

125 GeV Higgs boson, enhanced diphoton rate, and gaugedU(1)PQ-extended MSSM

125 GeV Higgs boson, enhanced diphoton rate, and gaugedU(1)PQ-extended MSSM

A call for new physics: The muon anomalous magnetic moment and lepton flavor violation

Neutrino Mass Mechanisms in 3-3-1 Models: A Short Review

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