### Abstract

We study how leptogenesis can be implemented in a seesaw model with S _{4} flavor symmetry, which leads to the neutrino tribimaximal mixing matrix and degenerate right-handed (RH) neutrino spectrum. Introducing a tiny soft S_{4} symmetry breaking term in the RH neutrino mass matrix, we show that the flavored resonant leptogenesis can be successfully realized, which can lower the seesaw scale much so, as to make it possible to probe in colliders. Even though such a tiny soft breaking term is essential for leptogenesis, it does not significantly affect the low-energy observables. We also investigate how the effective light neutrino mass |m_{ee}| associated with neutrinoless double beta decay can be predicted along with the neutrino mass hierarchies by imposing experimental data of low-energy observables. We find a direct link between leptogenesis and neutrinoless double beta decay characterized by |m_{ee}| through a high energy CP phase φ, which is correlated with low-energy Majorana CP phases. It is shown that our predictions of |m_{ee}| for some fixed parameters of high energy physics can be constrained by the current observation of baryon asymmetry.

Original language | English |
---|---|

Article number | 093005 |

Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |

Volume | 82 |

Issue number | 9 |

DOIs | |

Publication status | Published - 2010 Nov 8 |

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### All Science Journal Classification (ASJC) codes

- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)

### Cite this

_{4}symmetry.

*Physical Review D - Particles, Fields, Gravitation and Cosmology*,

*82*(9), [093005]. https://doi.org/10.1103/PhysRevD.82.093005

}

_{4}symmetry',

*Physical Review D - Particles, Fields, Gravitation and Cosmology*, vol. 82, no. 9, 093005. https://doi.org/10.1103/PhysRevD.82.093005

**Direct link between neutrinoless double beta decay and leptogenesis in a seesaw model with S _{4} symmetry.** / Ahn, Y. H.; Kang, Sin Kyu; Kim, Choong Sun; Nguyen, T. Phong.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Direct link between neutrinoless double beta decay and leptogenesis in a seesaw model with S4 symmetry

AU - Ahn, Y. H.

AU - Kang, Sin Kyu

AU - Kim, Choong Sun

AU - Nguyen, T. Phong

PY - 2010/11/8

Y1 - 2010/11/8

N2 - We study how leptogenesis can be implemented in a seesaw model with S 4 flavor symmetry, which leads to the neutrino tribimaximal mixing matrix and degenerate right-handed (RH) neutrino spectrum. Introducing a tiny soft S4 symmetry breaking term in the RH neutrino mass matrix, we show that the flavored resonant leptogenesis can be successfully realized, which can lower the seesaw scale much so, as to make it possible to probe in colliders. Even though such a tiny soft breaking term is essential for leptogenesis, it does not significantly affect the low-energy observables. We also investigate how the effective light neutrino mass |mee| associated with neutrinoless double beta decay can be predicted along with the neutrino mass hierarchies by imposing experimental data of low-energy observables. We find a direct link between leptogenesis and neutrinoless double beta decay characterized by |mee| through a high energy CP phase φ, which is correlated with low-energy Majorana CP phases. It is shown that our predictions of |mee| for some fixed parameters of high energy physics can be constrained by the current observation of baryon asymmetry.

AB - We study how leptogenesis can be implemented in a seesaw model with S 4 flavor symmetry, which leads to the neutrino tribimaximal mixing matrix and degenerate right-handed (RH) neutrino spectrum. Introducing a tiny soft S4 symmetry breaking term in the RH neutrino mass matrix, we show that the flavored resonant leptogenesis can be successfully realized, which can lower the seesaw scale much so, as to make it possible to probe in colliders. Even though such a tiny soft breaking term is essential for leptogenesis, it does not significantly affect the low-energy observables. We also investigate how the effective light neutrino mass |mee| associated with neutrinoless double beta decay can be predicted along with the neutrino mass hierarchies by imposing experimental data of low-energy observables. We find a direct link between leptogenesis and neutrinoless double beta decay characterized by |mee| through a high energy CP phase φ, which is correlated with low-energy Majorana CP phases. It is shown that our predictions of |mee| for some fixed parameters of high energy physics can be constrained by the current observation of baryon asymmetry.

UR - http://www.scopus.com/inward/record.url?scp=78651112686&partnerID=8YFLogxK

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U2 - 10.1103/PhysRevD.82.093005

DO - 10.1103/PhysRevD.82.093005

M3 - Article

VL - 82

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 1550-7998

IS - 9

M1 - 093005

ER -

_{4}symmetry. Physical Review D - Particles, Fields, Gravitation and Cosmology. 2010 Nov 8;82(9). 093005. https://doi.org/10.1103/PhysRevD.82.093005