2026/07/21 by N. H. T. Nha, L. T. Hue, N. T. K. Ngan +3
#hep-ph
Motivated by a recent study of the 3-3-1 model supplemented with a singlet scalar leptoquark, which successfully explains the muon anomalous magnetic moment and the decay μ→ eγ within current experimental constraints, we extend the phenomenological analysis of this framework to include the lepton-flavor-violating decays of the Standard Model-like Higgs and the Z boson. An interesting feature is that the branching ratios of these decays exhibit a nearly linear correlation with the corresponding charged lepton flavor-violating radiative decays, namely Br(h,Z→ eb^± ea^∓)\proptoBr(eb→ eaγ). Furthermore, the model exhibits a complementary interplay between the charged-lepton anomalous magnetic moments: parameter regions with |Δaμ|≥10-11 favor Br(h,Z→τ^±μ^∓) reaching their current experimental upper limits while keeping |Δae| negligible, whereas regions with 10-14≤|Δae|≤ 8×10-13 instead allow Br(h,Z→τ^± e^∓) to approach the present experimental sensitivities but simultaneously suppress |Δaμ| to the level of O(10-16).