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A low-scale flavon model with a ZNZ_N symmetry

Nov 20, 2019
48 pages
Published in:
  • JHEP 03 (2020) 129
  • Published: Mar 23, 2020
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Abstract: (Springer)
We propose a model that explains the fermion mass hierarchy by the Froggatt-Nielsen mechanism with a discrete ZNF {\mathrm{\mathbb{Z}}}_N^F symmetry. As a concrete model, we study a super-symmetric model with a single flavon coupled to the minimal supersymmetric Standard Model. Flavon develops a TeV scale vacuum expectation value for realizing flavor hierarchy, an appropriate μ-term and the electroweak scale, hence the model has a low cutoff scale. We demonstrate how the flavon is successfully stabilized together with the Higgs bosons in the model. The discrete flavor symmetry ZNF {\mathrm{\mathbb{Z}}}_N^F controls not only the Standard Model fermion masses, but also the Higgs potential and a mass of the Higgsino which is a good candidate for dark matter. The hierarchy in the Higgs-flavon sector is determined in order to make the model anomaly-free and realize a stable electroweak vacuum. We show that this model can explain the fermion mass hierarchy, realistic Higgs-flavon potential and thermally produced dark matter at the same time. We discuss flavor violating processes induced by the light flavon which would be detected in future experiments.
Note:
  • 47 pages, 6 figures and 4 tables; v2: version published in JHEP
  • Beyond Standard Model
  • Higgs Physics
  • Quark Masses and SM Parameters
  • Supersymmetric Standard Model
  • new physics
  • symmetry: Z(N)
  • symmetry: flavor
  • supersymmetry: flavor
  • flavor: hierarchy
  • flavor: violation