Activities
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Seminars
| Seminar on Theoretical and Computational Physics:
| | Title | Fermion masses and mixings in models with extended gauge symmetries
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| Speaker | Dr. Antonio Enrique Cárcamo Hernández
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| Affiliation | Universidad Tecnica Federico Santa Maria, Valparaiso, Chile
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| Date | Tuesday, 30-01-2018
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| Time | 10:00 AM
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| Location | Meeting room, 6th floor, 2H Building, 18 Hoang Quoc Viet, Hanoi
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| Abstract | In the first part of my talk I will discuss a predictive SU(3)CxSU(3)LxU(1)X(3-3-1) model with A4 family symmetry, consistent with the low energy fermion flavor data. In that model, the observed pattern of SM charged fermion masses and quark mixing angles arises from a Froggatt-Nielsen mechanism, whereas the light active neutrino masses are generated from a one loop level radiative inverse seesaw mechanism. In the second part of my talk, I will discuss the first renormalizable extension of the 3-3-1 model, which explains the SM fermion mass hierarchy by a sequential loop suppression: tree level top and exotic fermion masses, 1 loop bottom, charm, tau and muon masses; 2-loop masses for the light up, down, strange quarks as well as for the electron; while the light active neutrino masses are generated from a combination of linear and inverse seesaw mechanisms at two loop level. The SU(3)CxSU(3)LxU(1)X gauge symmetry is extended by Z2xZ4 symmetries, which are spontaneously and softly broken, respectively. The model successfully explains the observed SM fermion mass and mixing pattern and has viable scalar dark matter candidates.
This talk is based on the works arXiv:1705.05246 and arXiv:1705.09169.
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| Host person | Hoàng Ngọc Long
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