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

Y. H. Ahn, Sin Kyu Kang, Choong Sun Kim, T. Phong Nguyen

Research output: Contribution to journalArticle

17 Citations (Scopus)

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 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.

Original languageEnglish
Article number093005
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume82
Issue number9
DOIs
Publication statusPublished - 2010 Nov 8

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neutrinos
symmetry
decay
energy
matrices
hierarchies
baryons
broken symmetry
asymmetry
physics
probes
predictions

All Science Journal Classification (ASJC) codes

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

Cite this

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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 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.",
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Direct link between neutrinoless double beta decay and leptogenesis in a seesaw model with S4 symmetry. / Ahn, Y. H.; Kang, Sin Kyu; Kim, Choong Sun; Nguyen, T. Phong.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 82, No. 9, 093005, 08.11.2010.

Research output: Contribution to journalArticle

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