Particular textures of the minimal seesaw model

Zhao, Zhen-hua; Sun, Y. J.; Jiang, Shan-Shan

doi:10.1016/j.nuclphysb.2021.115405

Cited by 4 publications

(4 citation statements)

References 56 publications

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“…Of course, a realistic and viable model-building exercise of this kind will depend on some further assumptions for those unknown flavor parameters, including the heavy Majorana neutrino masses, the active-sterile flavor mixing angles and the corresponding CP-violating phases (see, e.g. [35,195,237,[257][258][259][260][261][262][263]).…”

Section: Constraints On the Leptogenesis Mechanismmentioning

confidence: 99%

The µ–τ reflection symmetry of Majorana neutrinos ^*

邢志忠

2023

Rep. Prog. Phys.

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The observed pattern of lepton ﬂavor mixing and CP violation strongly indicates the possible existence of a simple ﬂavor symmetry in the neutrino sector — the effective Majorana neutrino mass term keeps invariant when the three left-handed neutrino ﬁelds transform as νeL → (νeL)c, νµL → (ντL)c and ντL → (νµL)c. A direct application of such a µ-τ reﬂection symmetry to the canonical seesaw mechanism can help a lot to constrain the ﬂavor textures of active and sterile Majorana neutrinos. The present article is intended to summarize the latest progress made in exploring the properties of this minimal ﬂavor symmetry, its translational and rotational extensions, its soft breaking effects via radiative corrections from a superhigh energy scale to the electroweak scale, and its various phenomenological implications.

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Section: Constraints On the Leptogenesis Mechanismmentioning

confidence: 99%

The µ–τ reflection symmetry of Majorana neutrinos ^*

邢志忠

2023

Rep. Prog. Phys.

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“…and the two right-handed neutrino fields undergo an arbitrary unitary CP transformation (see, e.g., refs. [50][51][52] for a few concrete models of this kind), and the approximate relations obtained in eqs. (2.31), (2.32) and (2.34) keep valid only if the active-sterile flavor mixing parameters θ i6 and δ i6 (for i = 1, 2, 3) are switched off.…”

Section: Jhep06(2022)034mentioning

confidence: 99%

Identifying a minimal flavor symmetry of the seesaw mechanism behind neutrino oscillations

Zhang

2022

J. High Energ. Phys.

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In the canonical seesaw framework flavor mixing and CP violation in weak charged-current interactions of light and heavy Majorana neutrinos are correlated with each other and described respectively by the 3 × 3 matrices U and R. We show that the very possibility of |Uμi| = |Uτi| (for i = 1, 2, 3), which is strongly indicated by current neutrino oscillation data, automatically leads to a novel prediction |Rμi| = |Rτi| (for i = 1, 2, 3). We prove that behind these two sets of equalities and the experimental evidence for leptonic CP violation lies a minimal flavor symmetry — the overall neutrino mass term keeps invariant when the left-handed neutrino fields transform as νeL→ (νeL)c, νμL→ (ντL)c, ντL→ (νμL)c and the right-handed neutrino fields undergo an arbitrary unitary CP transformation. Such a generalized μ-τ reflection symmetry may help constrain the flavor textures of active and sterile neutrinos to some extent in the seesaw mechanism.

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“…(2.10) and Eq. (2.11) can also contribute to the resonant leptogenesis in type Ia as discussed in[74]. However, this also requires the product of couplings with different Higgs index.…”

mentioning

confidence: 98%

“…In general, the RH neutrinos can have Yukawa couplings to both of the Higgs doublets. In the type Ia seesaw model with a mass splitting, as discussed in[74], there is a contribution to resonant leptogenesis which is proportional to Y 1β Y * 2β and it can survive. However, in the type Ib seesaw model, the coupling to each Higgs doublet is unique.…”

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confidence: 99%

Leptogenesis in Type Ib seesaw models

Fu¹,

King²

2021

Preprint

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We study leptogenesis in three different realisations of the type Ib seesaw mechanism, where the effective masses of the neutrinos are obtained by the spontaneous symmetry breaking of two different Higgs doublets. In the minimal type Ib seesaw model, where two right-handed neutrinos form a Dirac mass, we show that it is impossible to produce the correct baryon asymmetry, even including a pseudo-Dirac mass splitting. In an extended type Ib seesaw model, with a third very heavy Majorana right-handed neutrino, together with the low scale Dirac pair of right-handed (RH) neutrinos and an extra singlet Higgs boson, we find that the imbalance of matter and antimatter can be explained by resonant leptogenesis. In the resulting low scale effective type Ib seesaw mechanism, we derive the allowed range of the seesaw couplings consistent with resonant leptogenesis. Dark matter may also be included via the right-handed neutrino portal. The Dirac RH neutrino masses may lie in the 1-100 GeV mass range, accessible to the future experiments SHiP and FCC-ee, allowing the type Ib seesaw mechanism with leptogenesis and dark matter to be tested.

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Particular textures of the minimal seesaw model

Cited by 4 publications

References 56 publications

The µ–τ reflection symmetry of Majorana neutrinos ^*

The µ–τ reflection symmetry of Majorana neutrinos ^*

Identifying a minimal flavor symmetry of the seesaw mechanism behind neutrino oscillations

Leptogenesis in Type Ib seesaw models

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About

Particular textures of the minimal seesaw model

Cited by 4 publications

References 56 publications

The µ–τ reflection symmetry of Majorana neutrinos *

The µ–τ reflection symmetry of Majorana neutrinos *

Identifying a minimal flavor symmetry of the seesaw mechanism behind neutrino oscillations

Leptogenesis in Type Ib seesaw models

Contact Info

Product

Resources

About

The µ–τ reflection symmetry of Majorana neutrinos ^*

The µ–τ reflection symmetry of Majorana neutrinos ^*