One colorful resolution to the neutrino mass generation, three lepton flavor universality anomalies, and the Cabibbo angle anomaly

Abstract

We propose a simple model to simultaneously explain four observed flavor anomalies while generating the neutrino mass at the one-loop level. Specifically, we address the measured anomalous magnetic dipole moments of the muon, $\Delta a_{\mu }$ , and electron, $\Delta a_e$, the observed anomaly of $b\to s{l}^{+}{l}^{-}$ in the $B$-meson decays, and the Cabibbo-angle anomaly. The model consists of four colorful new degrees of freedom: three scalar leptoquarks with the Standard Model quantum numbers $(3,3,-1/3),(3,2,1/6)$, and $(3,1,2/3)$, and one pair of down-quark-like vector fermion in $(3,1,-1/3)$. The baryon number is assumed to be conserved for simplicity. Phenomenologically viable solutions with the minimal number of real parameters can be found to accommodate all the above-mentioned anomalies and produce the approximate, close to $1\sigma$, neutrino oscillation pattern at the same time. From general consideration, the model robustly predicts: (1) neutrino mass is of the normal hierarchy type, and (2) ${\cal M}^ν_{ee}\lesssim 3\times 10^{-4}\mbox{eV}$. The possible UV origin to explain the flavor pattern of the found viable parameter space is briefly discussed. The parameter space can be well reproduced within a simple split fermion toy model.

49 pages, 8 figures. v2: Refs added, numerics updated to include new (g-2)_e and global fit. Conclusions unchanged

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Cited by in corpus (8)

• Dark Matter and $(g-2{)}_{\mu ,e}$ in radiative Dirac neutrino mass models
• Probing Neutrino Mass Models through Resonances at Neutrino Telescopes
• Marriage between neutrino mass and flavor anomalies
• General Remarks on the One-loop Contributions to the Muon Anomalous Magnetic Moment
• Muon $(g-2)$ and Flavor Puzzles in the $U(1{)}_X^{}$-gauged Leptoquark Model
• Neutrino masses, flavor anomalies and muon $\mathbf{g}-2$ from dark loops
• Discriminating 1D new physics solutions in $b\to s\ell \ell$ decays
• Constraining Scalar Doublet and Triplet Leptoquarks with Vacuum Stability and Perturbativity