Two-loop neutrino mass generation and its experimental consequences

Babu, K. S.; Macesanu, Cosmin

doi:10.1103/physrevd.67.073010

Cited by 153 publications

(213 citation statements)

References 48 publications

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“…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]. The most recent constraints on Zee-Babu model were studied in [48].…”

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

confidence: 99%

“…The U(1) B−L symmetry is spontaneously broken after ϕ obtains vacuum expectation value (vev). In [46], it was shown that µ hk < O(1) m h + to make the scalar potential stable. In this U(1) B−L model, this can be always guaranteed by taking small λ µ , since µ hk = λ µ v ϕ even for very large v ϕ .…”

Section: Jhep09(2014)153mentioning

confidence: 99%

“…The so-called 'Zee-Babu model' [44][45][46] provides new charged scalars, h + , k ++ at electroweak scale, in addition to the SM particles. These new charged scalars carry two units of lepton number and can generate Majorana neutrino masses via two-loop diagrams.…”

Section: Jhep09(2014)153mentioning

confidence: 99%

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

confidence: 99%

Section: Jhep09(2014)153mentioning

confidence: 99%

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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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“…The neutrino mass is generated radiatively. The additional suppression is guaranteed by a combination of loop integrals [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] and EW-scale masses entering the diagrams.…”

Section: Introductionmentioning

confidence: 99%

Systematic study of the d = 5 Weinberg operator at one-loop order

Bonnet

Hirsch

Ota

et al. 2012

J. High Energ. Phys.

168

222

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We perform a systematic study of the d = 5 Weinberg operator at the one-loop level. We identify three different categories of neutrino mass generation: (1) finite irreducible diagrams; (2) finite extensions of the usual seesaw mechanisms at one-loop and (3) divergent loop realizations of the seesaws. All radiative one-loop neutrino mass models must fall into one of these classes. Case (1) gives the leading contribution to neutrino mass naturally and a classic example of this class is the Zee model. We demonstrate that in order to prevent that a tree level contribution dominates in case (2), Majorana fermions running in the loop and an additional Z 2 symmetry are needed for a genuinely leading one-loop contribution. In the type-II loop extensions, the Yukawa coupling will be generated at one loop, whereas the type-I/III extensions can be interpreted as loop-induced inverse or linear seesaw mechanisms. For the divergent diagrams in category (3), the tree level contribution cannot be avoided and is in fact needed as counter term to absorb the divergence.

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“…The breaking of lepton number is communicated radiatively to the fermion sector and gives rise to Majorana neutrino masses at the two-loop level. The resulting neutrino spectrum has been compared to the oscillation data in [13]. We would like to investigate a scale-invariant version of Babu's model.…”

Section: Babu Modelmentioning

confidence: 99%

Neutrino mass in radiatively broken scale-invariant models

et al. 2007

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Scale invariance may be a classical symmetry which is broken radiatively. This provides a simple way to stabilize the scale of electroweak symmetry breaking against radiative corrections. The simplest phenomenologically successful model of this type involves the addition of one real scalar field to the standard model. In this minimal model the electroweak Higgs can be interpreted as the pseudo-Goldstone boson of broken scale invariance. We study the possible origin of neutrino mass in such models, both at tree-level and radiatively.

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Two-loop neutrino mass generation and its experimental consequences

Cited by 153 publications

References 48 publications

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

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

Systematic study of the d = 5 Weinberg operator at one-loop order

Neutrino mass in radiatively broken scale-invariant models

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