New approach to neutrino masses and leptogenesis with Occam’s razor

Barreiros, D. M.; Joaquim, F. R.; Yanagida, Tsutomu T.

doi:10.1103/physrevd.102.055021

Cited by 10 publications

(6 citation statements)

References 55 publications

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“…Now we turn to the zero textures of M D in the basis where the right-handed neutrino mass matrix M R is not diagonal anymore [194,187,195] (see Ref. [196] for a study on the case of the charged-lepton mass matrix M l being non-diagonal). To be specific, the following three textures of symmetric M R will be considered:…”

Section: When M R Is Not Diagonalmentioning

confidence: 99%

The minimal seesaw and leptogenesis models

Xing,

Zhao

2020

Preprint

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Given its briefness and predictability, the minimal seesaw -a simplified version of the canonical seesaw mechanism with only two right-handed neutrino fields -has been studied in depth and from many perspectives, and now it is being pushed close to a position of directly facing experimental tests. This article is intended to provide an up-to-date review of various phenomenological aspects of the minimal seesaw and its associated leptogenesis mechanism in neutrino physics and cosmology. Our focus is on possible flavor structures of such benchmark seesaw and leptogenesis scenarios and confronting their predictions with current neutrino oscillation data and cosmological observations. In this connection particular attention will be paid to the topics of lepton number violation, lepton flavor violation, discrete flavor symmetries, CP violation and antimatter of the Universe.

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Section: When M R Is Not Diagonalmentioning

confidence: 99%

The minimal seesaw and leptogenesis models

Xing,

Zhao

2020

Preprint

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“…(2.1) with the difference that ν R is replaced by (ν 1R ν 2R ) T , the mass M R is now a 2 × 2 matrix, and Y ν becomes a 3 × 2 matrix. The most restrictive patterns for the mass and Yukawa matrices which are compatible with neutrino data are given by [24,25,26]…”

Section: Neutrino Masses Spontaneous Cp Violation and Dark Matter Stabil-ity In The Scoto-seesaw Mechanismmentioning

confidence: 97%

Neutrino Masses from Z8 Scoto-Seesaw Model with Spontaneous CP Violation

Barreiros¹,

́ısica²,

Joaquim³

et al. 2021

Proceedings of the International Conference on Beyond Standard Model: From Theory to Experiment

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We consider a scoto-seesaw model where dark matter, neutrino masses and spontaneous CP violation are accommodated using a single horizontal Z 8 symmetry. This symmetry is broken down to a dark Z 2 by the complex vacuum expectation value of a scalar singlet, stabilizing dark matter and providing a spontaneous origin for leptonic CP violation. We conclude that the imposed Z 8 symmetry constrains the lightest neutrino mass and the Dirac phase to intervals currently probed by experiments. For a normally-ordered neutrino mass spectrum, the allowed compatibility regions will soon be fully scrutinized by neutrinoless double beta decay experiments and cosmological observations. *

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“…The lepton Yukawa and mass Lagrangian is identical to (2.1) with ν R replaced by (ν 1R ν 2R ) T , and M R replaced by a 2 × 2 symmetric matrix M R . In this case, the most constraining patterns for the Yukawa and mass matrices compatible with neutrino data are [37][38][39]:…”

Section: Jhep04(2021)249mentioning

confidence: 99%

Minimal scoto-seesaw mechanism with spontaneous CP violation

Barreiros

Joaquim

Srivastava

et al. 2021

J. High Energ. Phys.

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We propose simple scoto-seesaw models to account for dark matter and neutrino masses with spontaneous CP violation. This is achieved with a single horizontal $$ {\mathcal{Z}}_8 $$ Z 8 discrete symmetry, broken to a residual $$ {\mathcal{Z}}_2 $$ Z 2 subgroup responsible for stabilizing dark matter. CP is broken spontaneously via the complex vacuum expectation value of a scalar singlet, inducing leptonic CP-violating effects. We find that the imposed $$ {\mathcal{Z}}_8 $$ Z 8 symmetry pushes the values of the Dirac CP phase and the lightest neutrino mass to ranges already probed by ongoing experiments, so that normal-ordered neutrino masses can be cornered by cosmological observations and neutrinoless double beta decay experiments.

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New approach to neutrino masses and leptogenesis with Occam’s razor

Cited by 10 publications

References 55 publications

The minimal seesaw and leptogenesis models

The minimal seesaw and leptogenesis models

Neutrino Masses from Z8 Scoto-Seesaw Model with Spontaneous CP Violation

Minimal scoto-seesaw mechanism with spontaneous CP violation

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