Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2604.12755 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866908963079979008 |
|---|---|
| author | Binh, D. T. Binh, V. H. Hung, H. T. Van Loi, Duong |
| author_facet | Binh, D. T. Binh, V. H. Hung, H. T. Van Loi, Duong |
| contents | We extend the $SU(3)_C \times SU(3)_L \times U(1)_X$ model with neutral leptons (331LHN) by introducing scalar leptoquarks. We determine the particle content of the leptoquark multiplets and their Yukawa interactions with fermions. We find that a singlet leptoquark can fully account for the $4.2σ$ discrepancy in the muon anomalous magnetic moment $Δa_μ^{2021}$. The corresponding leptoquark mass is constrained to be $m_S \gtrsim 1.8$~TeV, consistent with current LHC bounds. We further consider the updated $Δa_μ^{2025}$ based on recent lattice QCD results, which strengthen the lower bound to $m_S \gtrsim 6$~TeV. Combining $Δa_μ$ with low-energy leptonic observables, including charged lepton flavor violation and the $μ$--$e$ conversion rate, we constrain the viable parameter space. The allowed leptoquark Yukawa couplings exhibit a normal hierarchical pattern under all constraints. We also investigate the collider phenomenology of the singlet leptoquark, showing that its QCD-driven pair production leads to suppressed signal rates at the LHC for multi-TeV masses, while future hadron colliders can significantly extend the discovery reach. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_12755 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Probing muon anomaly and lepton flavor violation with scalar leptoquarks in the 331LHN model Binh, D. T. Binh, V. H. Hung, H. T. Van Loi, Duong High Energy Physics - Phenomenology We extend the $SU(3)_C \times SU(3)_L \times U(1)_X$ model with neutral leptons (331LHN) by introducing scalar leptoquarks. We determine the particle content of the leptoquark multiplets and their Yukawa interactions with fermions. We find that a singlet leptoquark can fully account for the $4.2σ$ discrepancy in the muon anomalous magnetic moment $Δa_μ^{2021}$. The corresponding leptoquark mass is constrained to be $m_S \gtrsim 1.8$~TeV, consistent with current LHC bounds. We further consider the updated $Δa_μ^{2025}$ based on recent lattice QCD results, which strengthen the lower bound to $m_S \gtrsim 6$~TeV. Combining $Δa_μ$ with low-energy leptonic observables, including charged lepton flavor violation and the $μ$--$e$ conversion rate, we constrain the viable parameter space. The allowed leptoquark Yukawa couplings exhibit a normal hierarchical pattern under all constraints. We also investigate the collider phenomenology of the singlet leptoquark, showing that its QCD-driven pair production leads to suppressed signal rates at the LHC for multi-TeV masses, while future hadron colliders can significantly extend the discovery reach. |
| title | Probing muon anomaly and lepton flavor violation with scalar leptoquarks in the 331LHN model |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2604.12755 |