Sequentially loop-generated quark and lepton mass hierarchies in an extended Inert Higgs Doublet model

Summary, in English

Extended scalar and fermion sectors offer new opportunities for generating the observed strong hierarchies in the fermion mass and mixing patterns of the Standard Model (SM). In this work, we elaborate on the prospects of a particular extension of the Inert Higgs doublet model where the SM hierarchies are generated sequentially by radiative virtual corrections in a fully renormalisable way, i.e. without adding any non-renormalisable Yukawa terms or soft-breaking operators to the scalar potential. Our model has a potential to explain the recently observed R_K and R_K∗ anomalies, thanks to the non universal U_1X assignments of the fermionic fields that yield non universal Z′ couplings to fermions. We explicitly demonstrate the power of this model for generating the realistic quark, lepton and neutrino mass spectra. In particular, we show that due to the presence of both continuous and discrete family symmetries in the considered framework, the top quark acquires a tree-level mass, lighter quarks and leptons get their masses at one- and two-loop order, while neutrino masses are generated at three-loop level. The minimal field content, particle spectra and scalar potential of this model are discussed in detail.

• Author: A. E.Cárcamo Hernández; Sergey Kovalenko; Roman Pasechnik; Ivan Schmidt
• Department/s: Theoretical Particle Physics - Has been reorganised
• Publishing year: 2019-06-01
• Language: English
• Publication/Series: Journal of High Energy Physics
• Volume: 2019
• Issue: 6
• Links: http://dx.doi.org/10.1007/JHEP06(2019)056
• Document type: Journal article
• Publisher: Springer
• Topic: Subatomic Physics
• Keywords: Beyond Standard Model; Discrete Symmetries; Neutrino Physics; Quark Masses and SM Parameters
• Status: Published
• ISBN/ISSN/Other: ISSN: 1029-8479