Experimental tests for the Babu-Zee two–loop model of Majorana neutrino masses

Sierra, D. Aristizábal; Hirsch, Martin

doi:10.1088/1126-6708/2006/12/052

Cited by 88 publications

(65 citation statements)

References 21 publications

(34 reference statements)

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“…This is in agreement with the results found in the literature [383][384][385][386][387][388][389][390][391][392][393][394]. Note that the Zee-Babu setting provides no explanation for the g −2 anomaly since the contribution is negative, nevertheless we may use it to derive constraints on the the parameter space by enforcing its contribution to be below the error bars.…”

Section: Zee-babu Modelsupporting

confidence: 91%

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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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Section: Zee-babu Modelsupporting

confidence: 91%

“…Furthermore, m n are the charged lepton masses and M = max(m h , m k ). Using the fact that f is anti-symmetric, one can derive the following relations: [383][384][385] (IO).…”

Section: Zee-babu Modelmentioning

confidence: 99%

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

2018

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“…The additional suppression is guaranteed by a combination of loop integrals and sub-EW scale masses (for example SM charged lepton masses) entering the diagrams. At the one-and two-loop level, the Zee [21] 1 and the Cheng-Li-Babu-Zee models stand as benchmark references [16,26,27] and probably due to this reason they have been the subject of intensive phenomenological studies [25,[28][29][30][31][32][33][34].…”

Section: Jhep03(2015)040mentioning

confidence: 99%

Systematic classification of two-loop realizations of the Weinberg operator

Sierra

Degée

Dorame

et al. 2015

J. High Energ. Phys.

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We systematically analyze the d = 5 Weinberg operator at 2-loop order. Using a diagrammatic approach, we identify two different interesting categories of neutrino mass models: (i) Genuine 2-loop models for which both, tree-level and 1-loop contributions, are guaranteed to be absent. And (ii) finite 2-loop diagrams, which correspond to the 1-loop generation of some particular vertex appearing in a given 1-loop neutrino mass model, thus being effectively 2-loop. From the large list of all possible 2-loop diagrams, the vast majority are infinite corrections to lower order neutrino mass models and only a moderately small number of diagrams fall into these two interesting classes. Moreover, all diagrams in class (i) are just variations of three basic diagrams, with examples discussed in the literature before. Similarly, we also show that class (ii) diagrams consists of only variations of these three plus two more basic diagrams. Finally, we show how our results can be consistently and readily used in order to construct two-loop neutrino mass models.

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“…The observed mixing pattern can also be accommodated. The model parameters are strongly constrained by the neutrino mass and mixing data, the radiative muon decay, µ → eγ, and τ → 3µ decay [47].…”

Section: Jhep09(2014)153mentioning

confidence: 99%

“…It is well known the Zee-Babu model is strongly constrained by charged lepton flavor violating (LFV) processes such as µ → eγ or τ → µµµ [47]. The µ-parameter is constrained to be less than about 500 GeV to make the scalar potential stable [46].…”

Section: Implications For Neutrino Physics In Both Z 2 and U(1) B−l Mmentioning

confidence: 99%

Can Zee-Babu model implemented with scalar dark matter explain both Fermi-LAT 130 GeV γ-ray excess and neutrino physics?

Baek¹,

Ko²,

Okada³

et al. 2014

J. High Energ. Phys.

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Abstract:We extend the Zee-Babu model for the neutrino masses and mixings by first incorporating a scalar dark matter X with Z 2 symmetry and then X and a dark scalar ϕ with global U(1) symmetry. In the latter scenario the singly and doubly charged scalars that are new in the Zee-Babu model can explain the large annihilation cross section of a dark matter pair into two photons as hinted by the recent analysis of the Fermi γ-ray space telescope data. These new scalars can also enhance the B(H → γγ), as the recent LHC results may suggest. The dark matter relic density can be explained. The direct detection rate of the dark matter is predicted to be about one order of magnitude down from the current experimental bound in the first scenario.

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Experimental tests for the Babu-Zee two–loop model of Majorana neutrino masses

Cited by 88 publications

References 21 publications

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

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

Systematic classification of two-loop realizations of the Weinberg operator

Can Zee-Babu model implemented with scalar dark matter explain both Fermi-LAT 130 GeV γ-ray excess and neutrino physics?

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