Has the Origin of the Third-Family Fermion Masses been Determined?

Abstract

Precision measurements of the Higgs couplings are, for the first time, directly probing the mechanism of fermion mass generation. The purpose of this work is to determine to what extent these measurements can distinguish between the tree-level mechanism of the Standard Model and the theoretically motivated alternative of radiative mass generation. Focusing on the third-family, we classify the minimal one-loop models and find that they fall into two general classes. By exploring several benchmark models in detail, we demonstrate that a radiative origin for the tau-lepton and bottom-quark masses is consistent with current observations. While future colliders will not be able to rule out a radiative origin, they can probe interesting regions of parameter space.

39 pages, 15 figures; v2: references updated, published version

References in corpus (6)

• Automatic Calculation of supersymmetric Renormalization Group Equations and Self Energies
• SARAH 3.2: Dirac Gauginos, UFO output, and more
• The number density of a charged relic
• Electroweak Precision Tests of the Standard Model after the Discovery of the Higgs Boson
• Quark and lepton masses from top loops
• Naturalness made easy: two-loop naturalness bounds on minimal SM extensions

Cited by in corpus (12)

• A No-Lose Theorem for Discovering the New Physics of $(g-2{)}_{\mu }$ at Muon Colliders
• Muonic Force Behind Flavor Anomalies
• Radiatively generated fermion mass hierarchy from flavour non-universal gauge symmetries
• Active learning BSM parameter spaces
• An explanation of experimental data of $(g-2{)}_{e,\mu }$ in 3-3-1 models with inverse seesaw neutrinos
• The Muon Magnetic Moment and Physics Beyond the Standard Model
• How heavy can dark matter be? Constraining colourful unitarity with SARAH
• Gauged $SU(3{)}_F$ and loop induced quark and lepton masses
• A Large Muon EDM from Dark Matter
• Loop-induced masses for the first two generations with optimum flavour violation
• Radiative Mass Mechanism: Addressing the Flavour Hierarchy and Strong CP Puzzle
• Higgs Yukawa coupling constraints on a benchmark one-loop radiative mass model for the bottom, charm and tau