Anomalous Higgs Yukawa Couplings

Abstract

In the standard model, the Higgs boson $h$ couples to the quarks and charged leptons according to the well-known formula $(m_{\psi }/v)h\bar{\psi }\psi$, where $\psi$ = quark (q) or lepton (l) and $v$ = 246 GeV is its vacuum expectation value. Suppose $m_{\psi }$ is of radiative origin instead, then the effective $h\bar{\psi }\psi$ Yukawa coupling will not be exactly $m_{\psi }/v$. We show for the first time quantitatively how this may shift the observed branching fraction of $h\to \bar{b}b$ and $h\to {\tau }^{+}{\tau }^{-}$ upward or downward. Thus the precision measurements of Higgs decay to fermions at the Large Hadron Collider, due to resume operation in 2015, could be the key to possible new physics.

13 pages, 7 figures, version to appear in EPL

References in corpus (6)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• New Scotogenic Model of Neutrino Mass with $U(1{)}_D$ Gauge Interaction
• Radiative Origin of All Quark and Lepton Masses through Dark Matter with Flavor Symmetry
• Radiative corrections to the Yukawa coupling constants in two Higgs doublet models
• Exponentially spread dynamical Yukawa couplings from non-perturbative chiral symmetry breaking in the dark sector

Cited by in corpus (19)

• New U(1) Gauge Model of Radiative Lepton Masses with Sterile Neutrino and Dark Matter
• FCNC decays of SM fermions into a dark photon
• Soft $A_4\to Z_3$ Symmetry Breaking and Cobimaximal Neutrino Mixing
• Transformative A_4 Mixing of Neutrinos with CP Violation
• Radiative Yukawa Couplings in the Simplest Left-Right Symmetric Model
• Syndetic Model of Fundamental Interactions
• Gauge $U(1)$ Dark Symmetry and Radiative Light Fermion Masses
• Verifiable Associated Processes from Radiative Lepton Masses with Dark Matter
• Has the Origin of the Third-Family Fermion Masses been Determined?
• Universal Scotogenic Fermion Masses in Left-Right Gauge Model
• Higgs Boson Yukawa Form Factors from Supersymmetric Radiative Fermion Masses
• Anomalous Magnetic Moment and Higgs Coupling of the Muon in a Sequential U(1) Gauge Model with Dark Matter
• Split Left-Right Symmetry and Scotogenic Quark and Lepton Masses
• Dark Matter with Flavor Symmetry and its Collider Signature
• A Radiative Model of Quark Masses with Binary Tetrahedral Symmetry
• Hierarchical Quark and Lepton Masses with Sequential U(1) Gauge Symmetry
• Radiative Muon Mass Models and $(g-2{)}_{\mu }$
• Detecting quark anomalous electroweak couplings at the LHC
• Higgs Yukawa coupling constraints on a benchmark one-loop radiative mass model for the bottom, charm and tau