Charged lepton flavor violating decays and $(g-2)_{e_a}$ in an extended standard model with singlet and triplet leptoquarks
We study the anomalous magnetic moments of charged leptons and their lepton flavor-violating decays in a Standard Model extension containing one $SU(2)_L$singlet and one $SU(2)_L$ triplet scalar leptoquark. Our results reveal significant correlations among $Δa_{e,μ}$ and the decay rates of$e_b\to e_aγ$, and $h,Z\to e_b^\pm e_a^\mp$. In particular, the branching ratios $\mathrm{Br}(e_b\to e_aγ)$ and $\mathrm{Br}(h,Z\to e_b e_a)$ exhibit significant correlations. The model cannot simultaneously accommodate sizable values of $|Δa_e|=\mathcal{O}(10^{-13})$ and $|Δa_μ|=\mathcal{O}(10^{-10})$. For $|Δa_μ|=\mathcal{O}(10^{-10})$ and Br$(μ\to eγ)>10^{-15}$, the decay rates are suppressed to Br$(τ\to eγ)<\mathcal{O}(10^{-12})$ and Br$(h\to τe)<\mathcal{O}(10^{-6})$, while the remaining ones can reach the forthcoming experimental sensitivities. Conversely, for$|Δa_e|=\mathcal{O}(10^{-13})$, one obtains the suppressed decay rates Br$(τ\to μγ)<\mathcal{O}(10^{-11})$ and Br$(h\to τμ)<\mathcal{O}(10^{-7})$.