Origin of Yukawa couplings for Higgs and leptoquarks

Abstract

We propose a model in which the Yukawa couplings of Higgs doublets are related to the couplings of the chiral fermions to a scalar leptoquark triplet. This is due to their common origin via mixing with a vector-like family distinguished by a discrete $Z_5$ symmetry, under which only the three chiral families are neutral. The model predicts lepton non-universality in $B$ to $K$ decays, depending on the leptoquark mass, $V_{ts}$ and $m_{\mu }/m_{\tau }$. The model can only consistently explain the anomalies in $R_{K^{(\ast )}}$ for a leptoquark mass close to the collider lower bound of about $1\text{TeV}$. Constraints from $B_s-{\bar{B}}_s$ mixing and eventually $\tau \to \mu \gamma$ become relevant for low leptoquark masses and large couplings, while $\mu \to e\gamma$ remains automatically under control due to the absence of leptoquark couplings to the electron in this model.

arXiv comment20 pages, 7 figures. v2: references added

References in corpus (41)

• Test of lepton universality using $B^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ decays
• Test of lepton universality with $B^0\to K^{\ast 0}{\ell }^{+}{\ell }^{-}$ decays
• Physics of leptoquarks in precision experiments and at particle colliders
• Searches for Lepton Flavor Violation in the Decays tau -> e gamma and tau -> mu gamma
• Understanding the B->K*mu+mu- Anomaly
• Effective field theory approach to $b\to s\ell {\ell }^{(\prime )}$, $B\to K^{(\ast )}\nu \bar{\nu }$ and $B\to D^{(\ast )}\tau \nu$ with third generation couplings
• Global analysis of $b\to s\ell \ell$ anomalies
• Patterns of New Physics in $b\to s{\ell }^{+}{\ell }^{-}$ transitions in the light of recent data
• Flavour anomalies after the $R_{K^{\ast }}$ measurement
• $R_K$ and future $b\to s\ell \ell$ BSM opportunities
• Lepton Flavor Violation in B Decays?
• Baryon Number and Lepton Universality Violation in Leptoquark and Diquark Models
• Towards the discovery of new physics with lepton-universality ratios of $b\to s\ell \ell$ decays
• $R_K$ and $R_{K^{\ast }}$ beyond the Standard Model
• Hint of Lepton Flavour Non-Universality in $B$ Meson Decays
• The Leptoquark Hunter's Guide: Pair Production
• New Search for tau -> mu gamma and tau -> e gamma Decays at Belle
• New Physics in $b\to s{\mu }^{+}{\mu }^{-}$ after the Measurement of $R_{K^{\ast }}$
• Leptoquark Flavor Patterns & B Decay Anomalies
• Explaining the $R_K$ and $R_{K^{\ast }}$ anomalies
• The role of the $S_3$ GUT leptoquark in flavor universality and collider searches
• The Leptoquark Hunter's Guide: Large Coupling
• The phenomenology of electric dipole moments in models of scalar leptoquarks
• Leptoquark toolbox for precision collider studies
• Flavorful leptoquarks at hadron colliders
• Role of Tensor operators in $R_K$ and $R_{K^{\ast }}$
• Flavourful $Z^{\prime }$ portal for vector-like neutrino Dark Matter and $R_{K^{(\ast )}}$
• A "Vector-like chiral" fourth family to explain muon anomalies
• Flavourful $Z^{\prime }$ models for $R_{K^{(\ast )}}$
• Interpreting the $R_{K^{(\ast )}}$ Anomaly in the Colored Zee-Babu Model
• A common origin of $R_K$ and neutrino masses
• $R_{K^{(\ast )}}$ and the origin of Yukawa couplings
• Flavour from accidental symmetries
• Reconciling $B$-decay anomalies with neutrino masses, dark matter and constraints from flavour violation
• Lepton non-universality in $B$ decays and fermion mass structure
• Testing Minimal Flavor Violation in Leptoquark Models of the $R_{K^{(\ast )}}$ Anomaly
• $R_{K^{(\ast )}}$ with leptoquarks and the origin of Yukawa couplings
• Non-universal $Z^{\prime }$ from Fluxed GUTs
• Non-universal Z' from SO(10) GUTs with vector-like family and the origin of neutrino masses
• Muon anomalies and the $SU(5)$ Yukawa relations
• Consequences of a unified, anarchical model of fermion masses and mixings

Cited by in corpus (10)

• Combined explanations of $(g-2{)}_{\mu }$, $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$ anomalies in a two-loop radiative neutrino mass model
• $R_2$ as a single leptoquark solution to $R_{D^{(\ast )}}$ and $R_{K^{(\ast )}}$
• A Common Origin of Neutrino Masses and $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$ Anomalies
• A nonunitary interpretation for a single vector leptoquark combined explanation to the $B$-decay anomalies
• Twin Pati-Salam theory of flavour with a TeV scale vector leptoquark
• Finite Family Groups for Fermionic and Leptoquark Mixing Patterns
• Marriage between neutrino mass and flavor anomalies
• $B-L$ violating nucleon decays as a probe of leptoquarks and implications for baryogenesis
• The fate of $V_1$ vector leptoquarks: the impact of future flavour data
• Fermiophobic $Z^{\prime }$ model for simultaneously explaining the muon anomalies $R_{K^{(\ast )}}$ and $(g-2{)}_{\mu }$