A Model of Neutrino Mass and Dark Matter with an Accidental Symmetry

Ahriche, Amine; McDonald, Kristian L.; Nasri, Salah; Toma, Takashi

doi:10.48550/arxiv.1504.05755

Cited by 15 publications

(25 citation statements)

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“…Detailed studies show that the variant models have large regions of viable parameter space that fit the neutrino oscillation data, reproduce the observed DM relic density, and satisfy experimental constraints from, e.g, LFV searches [14][15][16]. In each of the variant models, the DM is a heavy Majorana fermion and the mass for S 2 should obey M 2 > M DM , placing both multiplets beyond the reach of current colliders.…”

Section: A Class Of Three-loop Models With Dark Mattermentioning

confidence: 71%

“…• The septuplet model: This case has S 2 ∼ (1, 7, 2) and N R ∼ (1, 7, 0), and is of particular interest [16].…”

Section: A Class Of Three-loop Models With Dark Mattermentioning

confidence: 99%

“…This gives a common description for neutrino mass and DM without requiring any new symmetries. The DM is relatively heavy, with M DM ≈ 20 − 25 TeV, due to the Sommerfeld enhancement induced by SU (2) gauge boson exchange [16].…”

Section: A Class Of Three-loop Models With Dark Mattermentioning

confidence: 99%

“…The models with larger SU (2) L multiplets also generate sizable contributions to LFV processes like µ → e + γ. In fact, these are typically enhanced relative to the KNT case, improving the prospects for testing the model in future LFV searches [14][15][16]. Due to the new gauge interactions for the DM, direct-detection prospects also improve for the models with larger multiplets [14][15][16].…”

Section: A Class Of Three-loop Models With Dark Mattermentioning

confidence: 99%

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Models for neutrino mass and physics beyond standard model

Ahriche¹,

McDonald²,

Nasri³

2015

Preprint

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In this work, we report on recent analysis of three-loop models of neutrino mass with dark matter. We discuss in detail the model of Krauss-Nasri-Trodden (KNT) [1], showing that it offers a viable solution to the neutrino mass and dark matter problems, and describe observable experimental signals predicted by the model. Furthermore, we show that the KNT model belongs to a larger class of three-loop models that can differ from the KNT approach in interesting ways. I. INTRODUCTIONModels with radiative neutrino mass are of significant experimental interest. The inherent loop-suppression in such models allows the new physics responsible for neutrino mass to be lighter than otherwise expected. Such light new physics can be within experimental reach, either directly, through collider experiments, or indirectly, via e.g. searches for lepton flavor violating (LFV) effects. The loop suppression becomes more severe as the number of loops increases. Thus, models with three-loop masses are particularly interesting, as they generically require new physics at or around the TeV scale.He we present a class of models with radiative neutrino mass at the three-loop level [1][2][3]. We focus primarily on the KNT model [1] and report recent analysis showing that the model satisfies LFV constraints, such as µ → e + γ, and fits the neutrino oscillation data. Furthermore, the model contains a viable candidate for the dark matter (DM) in the universe, in the form of a light right-handed (RH) neutrino. We also show that a strongly first order electroweak phase transition can be achieved with a Higgs mass of ≃ 125 GeV, as measured at the LHC [4,5]. The model contains new charged scalars and we discuss their effect on the one-loop Higgs decay to neutral gauge bosons. Afterwards, we show that the KNT model belongs to a larger class of related three-loop models and briefly outline their features.

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Section: A Class Of Three-loop Models With Dark Mattermentioning

confidence: 71%

“…• The septuplet model: This case has S 2 ∼ (1, 7, 2) and N R ∼ (1, 7, 0), and is of particular interest [16].…”

Section: A Class Of Three-loop Models With Dark Mattermentioning

confidence: 99%

Section: A Class Of Three-loop Models With Dark Mattermentioning

confidence: 99%

Section: A Class Of Three-loop Models With Dark Mattermentioning

confidence: 99%

See 2 more Smart Citations

Models for neutrino mass and physics beyond standard model

Ahriche¹,

McDonald²,

Nasri³

2015

Preprint

Self Cite

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show abstract

“…Notably, the three-loop model is under a well known threat that invoking large multiplets [11] leads to Landau poles (LP) considerably below the Planck scale, potentially sensitive to two-loop RGE [24] effects. For the SU (2) L gauge coupling g 2 , this threat has been addressed in [25] for the particle content of two scotogenic three-loop neutrino mass models [4,26] In the three-loop model the branching ratios are calculated for the benchmark point in (18).…”

Section: Vacuum Stability and Perturbativitymentioning

confidence: 99%

Extended Higgs sectors in radiative neutrino models

et al. 2017

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Testable Higgs partners may be sought within the extensions of the SM Higgs sector aimed at generating neutrino masses at the loop level. We study a viability of extended Higgs sectors for two selected models of radiative neutrino masses: a one-loop mass model, providing the Higgs partner within a real triplet scalar representation, and a three-loop mass model, providing it within its two-Higgs-doublet sector. The Higgs sector in the one-loop model may remain stable and perturbative up to the Planck scale, whereas the three-loop model calls for a UV completion around 10 6 GeV. Additional vector-like lepton and exotic scalar fields, which are required to close oneand three-loop neutrino-mass diagrams, play a decisive role for the testability of the respective models. We constrain the parameter space of these models using LHC bounds on diboson resonances.

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The scale-invariant scotogenic model

Ahriche

McDonald

Nasri

2016

J. High Energ. Phys.

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We investigate a minimal scale-invariant implementation of the scotogenic model and show that viable electroweak symmetry breaking can occur while simultaneously generating one-loop neutrino masses and the dark matter relic abundance. The model predicts the existence of a singlet scalar (dilaton) that plays the dual roles of triggering electroweak symmetry breaking and sourcing lepton number violation. Important constraints are studied, including those from lepton flavor violating effects and dark matter direct-detection experiments. The latter turn out to be somewhat severe, already excluding large regions of parameter space. None the less, viable regions of parameter space are found, corresponding to dark matter masses below (roughly) 10 GeV and above 200 GeV.

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A Model of Neutrino Mass and Dark Matter with an Accidental Symmetry

Cited by 15 publications

References 0 publications

Models for neutrino mass and physics beyond standard model

Models for neutrino mass and physics beyond standard model

Extended Higgs sectors in radiative neutrino models

The scale-invariant scotogenic model

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