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Bridging flavour violation and leptogenesis in SU(3) family models

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Abstract

Were consider basic Pati-Salam ×SU(3) family models implementing the Type I see-saw mechanism to reproduce the observed fermion masses and mixing. Our goal is to explore a model with minimal field content which accounts for the observed baryon asymmetry through the thermal decay of the lightest right-handed neutrino consistently with the expected experimental lepton flavour violation sensitivity. This kind of models have been previously considered but it was not possible to achieve a compatibility among all of the ingredients mentioned above. We emphasize how different SU(3) messengers, the heavy fields that decouple and produce the right form of the Yukawa couplings together with the scalars breaking the SU(3) symmetry, can lead to different Yukawa couplings. This in turn implies different consequences for flavour violation couplings and conditions for realizing the right amount of baryon asymmetry through the decay of the lightest right-handed neutrino. Another highlight of the present work is a new fit of the Yukawa textures traditionally embedded in SU(3) family models.

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Authors and Affiliations

  1. Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), D-80805, München, Germany

    Lorenzo Calibbi

  2. Korea Institute for Advanced Study, 207-43 Cheongryangri-dong, Dongdaemun-gu, Seoul, 130-012, Korea

    Eung Jin Chun

  3. The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, Trieste, 34151, Italy

    Liliana Velasco-Sevilla

Authors
  1. Lorenzo Calibbi
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  2. Eung Jin Chun
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  3. Liliana Velasco-Sevilla
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Correspondence to Eung Jin Chun.

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ArXiv ePrint: 1005.5563

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Calibbi, L., Chun, E.J. & Velasco-Sevilla, L. Bridging flavour violation and leptogenesis in SU(3) family models. J. High Energ. Phys. 2010, 90 (2010). https://doi.org/10.1007/JHEP11(2010)090

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