Electric dipole moments in the minimal scotogenic model

Abada, Asmâa; Toma, Takashi

doi:10.1007/jhep04(2018)030

Cited by 20 publications

(14 citation statements)

References 92 publications

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“…The EDMs in the minimal scotogenic model have already been calculated in ref. [22]. Here we show that in its extensions new diagrams contributing to EDMs appear, and we emphasize these give a dominant contribution.…”

Section: Introductionsupporting

confidence: 51%

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Electric dipole moments in the extended scotogenic models

Fujiwara

Hisano

Kanai

et al. 2021

J. High Energ. Phys.

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Electric dipole moments (EDMs) of charged leptons arise from a new source of CP violation in the lepton sector. In this paper, we calculate the EDMs of the charged leptons in the minimal scotogenic model with two singlet fermions, and the models extended with one or two triplet fermions instead of the singlet fermions, taking into account the constraints of the neutrino oscillation data, the charged lepton flavor violation and perturbative unitarity bound for the Yukawa couplings. We show that the hybrid model with one singlet and one triplet fermions predicts an electron EDM larger than the other models in both normal and inverted neutrino mass hierarchy. We find some parameter space has already been ruled out by the current upper bound of the electron EDM and further parameter space can be explored by future experiments.

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Section: Introductionsupporting

confidence: 51%

“…Charged lepton EDMs at two-loop levelIn the previous work[22], the charged lepton EDMs have been calculated in the minimal scotogenic model which corresponds to the SS model. We revisit this calculation and extend…”

mentioning

confidence: 99%

Electric dipole moments in the extended scotogenic models

Fujiwara

Hisano

Kanai

et al. 2021

J. High Energ. Phys.

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“…See Ref [39]. for the calculation of the electric dipole moments in the minimal ScM which has two new Majorana fermions.…”

mentioning

confidence: 99%

Phenomenology of the generalised scotogenic model with fermionic dark matter

Hagedorn

Herrero-García

Molinaro

et al. 2018

J. High Energ. Phys.

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We study a simple extension of the Standard Model that accounts for neutrino masses and dark matter. The Standard Model is augmented by two Higgs doublets and one Dirac singlet fermion, all charged under a new dark global symmetry. It is a generalised version of the Scotogenic Model with Dirac fermion dark matter. Masses for two neutrinos are generated radiatively at one-loop level. We study the case where the singlet fermion constitutes the dark matter of the Universe. We study in depth the phenomenology of the model, in particular the complementarity between dark matter direct detection and charged lepton flavour violation observables. Due to the strong limits from the latter, dark matter annihilations are suppressed and the relic abundance is set by coannihilations with (and annihilations of) the new scalars if the latter and the Dirac fermion are sufficiently degenerate in mass. We discuss how different ratios of charged lepton flavour violating processes can be used to test the model. We also discuss the detection prospects of the charged scalars at colliders. In some cases these leave ionising tracks and in others have prompt decays, depending on the flavour in the final state and neutrino mass orderings.

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“…The most important constraint is expected from the T parameter, which is sensitive to the mass splitting between the neutral and charged components of the scalar fields. From the one-loop contribution to the T parameter it follows that m η ± − m η R 140 GeV [52]. Given the perturbativity constraint on the relevant λ i parameters, this condition is automatically fulfilled in all phenomenologically viable solutions of our numerical scan.…”

Section: Electroweak Precision Testsmentioning

confidence: 81%

“…We have required that the contributions to the anomalous muon magnetic dipole moment induced by the new physics do not exceed the allowed discrepancy between the measured value and the one predicted within the SM [53], (a μ ) = a exp μ − a SM μ = 268(63)(43) × 10 −11 . Contributions to the electric dipole moments arise instead only at the two-loop level, so they are suppressed [52].…”

Section: E Invisible Decay Widths Of the Higgs Boson If The New Neutmentioning

confidence: 99%

Phenomenology of scotogenic scalar dark matter

et al. 2020

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We reexamine the minimal Singlet $$+$$ + Triplet Scotogenic Model, where dark matter is the mediator of neutrino mass generation. We assume it to be a scalar WIMP, whose stability follows from the same $${\mathbb {Z}}_{2}$$ Z 2 symmetry that leads to the radiative origin of neutrino masses. The scheme is the minimal one that allows for solar and atmospheric mass scales to be generated. We perform a full numerical analysis of the signatures expected at dark matter as well as collider experiments. We identify parameter regions where dark matter predictions agree with theoretical and experimental constraints, such as neutrino oscillations, Higgs data, dark matter relic abundance and direct detection searches. We also present forecasts for near future direct and indirect detection experiments. These will further probe the parameter space. Finally, we explore collider signatures associated with the mono-jet channel at the LHC, highlighting the existence of a viable light dark matter mass range.

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Electric dipole moments in the minimal scotogenic model

Cited by 20 publications

References 92 publications

Electric dipole moments in the extended scotogenic models

Electric dipole moments in the extended scotogenic models

Phenomenology of the generalised scotogenic model with fermionic dark matter

Phenomenology of scotogenic scalar dark matter

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