Radiatively Generated Leptogenesis in S4 Flavor Symmetry Models
We study how leptogenesis can be implemented in the seesaw models with S4 flavor symmetry, which lead to the tri-bimaximal neutrino mixing matrix. By considering renormalization group evolution from a high-energy scale of flavor symmetry breaking (the GUT scale is assumed) to the low-energy scale of...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2012-01-01
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| Series: | Advances in High Energy Physics |
| Online Access: | http://dx.doi.org/10.1155/2012/254093 |
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| Summary: | We study how leptogenesis can be implemented in the seesaw models with S4 flavor symmetry, which lead to the tri-bimaximal neutrino mixing matrix. By considering renormalization group
evolution from a high-energy scale of flavor symmetry breaking (the GUT scale is assumed) to the
low-energy scale of relevant phenomena, the off-diagonal terms in a combination of Dirac Yukawa-coupling matrix can be generated and the degeneracy of heavy right-handed neutrino Majorana
masses can be lifted. As a result, the flavored leptogenesis is successfully realized. 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 the experimental data on the low-energy observables. We find a link between the leptogenesis and the neutrinoless double beta decay
characterized by |〈mee〉| through a high-energy CP phase ϕ, which is correlated with the low-energy
Majorana CP phases. It is shown that the predictions of |〈mee〉| for some fixed parameters of the
high-energy physics can be constrained by the current observation of baryon asymmetry. |
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| ISSN: | 1687-7357 1687-7365 |