Testing radiative neutrino mass models at the LHC

Cai, Yi-Fu; Clarke, Jackson D.; Schmidt, Michael A.; Volkas, Raymond R.

doi:10.1007/jhep02(2015)161

Cited by 45 publications

(89 citation statements)

References 191 publications

(279 reference statements)

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“…Our findings can be understood as a guide for the construction of 2-loop neutrino mass models, which arguably might serve for several purposes, e.g: systematic study of neutrino mass model signals at the LHC (testing the origin of neutrino masses at the LHC, as has been pointed out at the 1-loop level e.g. in [86][87][88], and at the 2-loop level in [89]) or systematic construction of common frameworks for neutrino masses and dark matter (in the same vein it has been done for the 1-loop case [90]). Figure 14.…”

Section: Discussionmentioning

confidence: 90%

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: Discussionmentioning

confidence: 90%

Systematic classification of two-loop realizations of the Weinberg operator

Sierra

Degée

Dorame

et al. 2015

J. High Energ. Phys.

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“…31 Our theory will produce O 3 , with a subdominant O 8 . The exotic scalar φ and exotic fermion χ have the quantum numbers…”

Section: Collider Constraints On a New Radiative Modelmentioning

confidence: 99%

“…Table 1 lists the quantum numbers under SU(3)×SU(2)×U (1) for scalar-only and scalar-fermion extensions. 31 The example in boldface will be analysed in detail below. The diagram topologies are given in Fig.…”

Section: 7mentioning

confidence: 99%

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Searching for radiative neutrino mass generation at the LHC

Volkas

2015

Int. J. Mod. Phys. A

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In this talk, I describe the general characteristics of radiative neutrino mass models that can be probed at the LHC. I then cover the specific constraints on a new, explicit model of this type.Keywords: Neutrino; radiative mass generation; effective operators; flavor-violation constraints; LHC constraints See-saw versus radiative neutrino mass generationMany models of radiative neutrino mass are possible, some of which have been analysed in depth, while others have been examined only briefly, with quite a number yet to be explicitly written down let alone analysed. A useful organising principle for Majorana neutrino mass models is to use standard model (SM) effective operators that violate lepton number conservation by two units (∆L = 2 operators) as a base from which to construct new theories. 1-7Restricting ourselves to operators containing SM fermions and a single Higgs doublet, they occur at odd mass dimensions, with the lowest order one occurring at d = 5. That operator is the famous Weinberg operator, which has the schematic structure LLHH, where L is a lepton doublet and H the Higgs doublet. After electroweak symmetry breaking, this operator (actually a set of operators because of the family structure) directly induces a Majorana neutrino mass for left-handed (LH) neutrinos given by the see-saw formula,where M is the scale of the new physics that gives rise to the operator in the low-energy limit. Underlying renormalisable theories yielding LLHH are constructed by "opening up" the operator. The type-1,-2 and -3 see-saw models are the minimal, tree-level ways to open up LLHH. [8][9][10][11][12][13][14][15][16][17][18][19] By starting with the effective operator, one may systematically construct all of the minimal underlying models.Other ∆L = 2 effective operators have mass dimension seven or higher and feature other lepton and quark fields in their expression, except for those in the

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“…(1.1) is actually O8 in the Babu-Leung list [47] of the LNV operators up to dimension-11, and has already been throughly studied in refs. [51,52]. But it has not yet been pointed out the interesting new neutrino-antineutrino modes in this scenario.…”

mentioning

confidence: 98%

Large ν ‐ ν ¯ $$ \nu \hbox{-} \overline{\nu} $$ oscillations from high-dimensional lepton number violating operator

Geng

Huang

2017

J. High Energ. Phys.

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It is usually believed that the observation of the neutrino-antineutrino (ν-ν) oscillations is almost impossible since the oscillation probabilities are expected to be greatly suppressed by the square of tiny ratio of neutrino masses to energies. Such an argument is applicable to most models for neutrino mass generation based on the Weinberg operator, including the seesaw models. However, in the present paper, we shall give a counterexample to this argument, and show that large ν-ν oscillation probabilities can be obtained in a class of models in which both neutrino masses and neutrinoless double beta (0νββ) decays are induced by the high-dimensional lepton number violating operator O 7 =ū R l c RL L H * d R + H.c. with u and d representing the first two generations of quarks. In particular, we find that the predicted 0νββ decay rates have already placed interesting constraints on the ν e ↔ν e oscillation. Moreover, we provide an UV-complete model to realize this scenario, in which a dark matter candidate naturally appears due to the new U(1) d symmetry.

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Testing radiative neutrino mass models at the LHC

Cited by 45 publications

References 191 publications

Systematic classification of two-loop realizations of the Weinberg operator

Systematic classification of two-loop realizations of the Weinberg operator

Searching for radiative neutrino mass generation at the LHC

Large ν ‐ ν ¯ $$ \nu \hbox{-} \overline{\nu} $$ oscillations from high-dimensional lepton number violating operator

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