Leptonic charged Higgs decays in the Zee model

Sierra, D. Aristizábal; Restrepo, Diego

doi:10.1088/1126-6708/2006/08/036

Cited by 35 publications

(16 citation statements)

References 47 publications

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“…We have followed therefore a sort of "algorithm" for O 5 at the two-loop order: (i) derive all possible 1 The minimal Zee model [22] is ruled out since it predicts maximal mixing in the atmospheric as well as in the solar sector. However, its non-minimal version is fully consistent with neutrino data [23][24][25]. 2 Note that an exception to this statement does exist.…”

Section: Jhep03(2015)040supporting

confidence: 57%

“…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%

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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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Section: Jhep03(2015)040supporting

confidence: 57%

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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“…A similar situation arises in models like the inverse seesaw [19]. Such low-scale models have the advantage that the new fields responsible for the generation of neutrino masses may be directly accessible to future accelerator experiments, see for example [20,21,22,23,24].…”

Section: Introductionmentioning

confidence: 81%

Probing minimal supergravity in the type-I seesaw mechanism with lepton flavor violation at the CERN LHC

et al. 2008

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The most general supersymmetric seesaw mechanism has too many parameters to be predictive and thus can not be excluded by any measurements of lepton flavour violating (LFV) processes.We focus on the simplest version of the type-I seesaw mechanism assuming minimal supergravity boundary conditions. We compute branching ratios for the LFV scalar tau decays,τ 2 → (e, µ)+χ 0 1 , as well as loop-induced LFV decays at low energy, such as l i → l j + γ and l i → 3l j , exploring their sensitivity to the unknown seesaw parameters. We find some simple, extreme scenarios for the unknown right-handed parameters, where ratios of LFV branching ratios correlate with neutrino oscillation parameters. If the overall mass scale of the left neutrinos and the value of the reactor angle were known, the study of LFV allows, in principle, to extract information about the so far unknown right-handed neutrino parameters.

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“…To mention a few examples, there are supersymmetric models with violation of R-parity [9,24], models with Higgs triplets [23], or a combination of both [25]. Also purely radiative models have been discussed in the literature, both with neutrino masses at 1-loop [26,27] or at 2-loop [28][29][30][31] order. Radiative mechanisms might be considered especially appealing, since they generate small neutrino masses automatically, essentially due to loop suppression factors.…”

Section: Introductionmentioning

confidence: 99%

Leptoquarks: Neutrino masses and related accelerator signals

2008

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Leptoquark-Higgs interactions induce mixing between leptoquark (LQ) states with different chiralities once the electroweak symmetry is broken. In such LQ models Majorana neutrino masses are generated at 1-loop order. Here we calculate the neutrino mass matrix and explore the constraints on the parameter space enforced by the assumption that LQ-loops explain current neutrino oscillation data. LQs will be produced at the CERN LHC, if their masses are at or below the TeV scale. Since the fermionic decays of LQs are governed by the same Yukawa couplings, which are responsible for the nontrivial neutrino mass matrix, several decay branching ratios of LQ states can be predicted from measured neutrino data. Especially interesting is that large lepton flavor violating rates in muon and tau final states are expected. In addition, the model predicts that, if kinematically possible, heavier LQs decay into lighter ones plus either a standard model Higgs boson or a Z 0 =W gauge boson. Thus, experiments at the LHC might be able to exclude the LQ mechanism as an explanation of neutrino data.

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Leptonic charged Higgs decays in the Zee model

Cited by 35 publications

References 47 publications

Systematic classification of two-loop realizations of the Weinberg operator

Systematic classification of two-loop realizations of the Weinberg operator

Probing minimal supergravity in the type-I seesaw mechanism with lepton flavor violation at the CERN LHC

Leptoquarks: Neutrino masses and related accelerator signals

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