A low-scale flavon model with a ℤ N symmetry

Journal of High Energy Physics

Junichiro Kawamura¹  Tetsutaro Higaki¹ 

[1] Department of Physics, Keio University;

关键词: Beyond Standard Model;    Higgs Physics;    Quark Masses and SM Parameters;    Supersymmetric Standard Model;   

DOI  :  10.1007/JHEP03(2020)129

来源: DOAJ

【 摘 要 】

Abstract We propose a model that explains the fermion mass hierarchy by the Froggatt-Nielsen mechanism with a discrete ℤ N F $$ {\mathrm{\mathbb{Z}}}_N^F $$ 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 ℤ N F $$ {\mathrm{\mathbb{Z}}}_N^F $$ 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.

【 授权许可】

Unknown