https://doi.org/10.1140/epjc/s10052-025-14462-w
Regular Article - Theoretical Physics
Exploring solutions to the muon g-2 anomaly in a 3-3-1 model under flavor constraints
1
Universidade Tecnologica Federal do Parana-UTFPR-DAFIS, R. Doutor Washington Subtil Chueire, 330-Jardim Carvalho, 84017-220, Ponta Grossa, PR, Brazil
2
Departament de Física Quàntica i Astrofísica and Institut de Ciències del Cosmos, Universitat de Barcelona, Diagonal 647, 08028, Barcelona, Spain
3
Departamento de Física, Universidade Federal da Paraíba, Caixa Postal 5008, 58051-970, João Pessoa, PB, Brazil
a
joaopaulo.pinheiro@fqa.ub.edu
Received:
17
January
2025
Accepted:
23
June
2025
Published online:
4
July
2025
The magnetic moment of the muon can receive significant two-loop contributions from a light pseudoscalar. Notably, the spectrum of scalars of 3-3-1 models includes one pseudoscalar. However, this scalar spectrum inevitably gives rise to flavor-changing neutral current (FCNC) processes. In this study, we examine, within the 3-3-1 model with right-handed neutrinos, whether such spectrum of scalars can account for the anomalous magnetic moment of the muon, considering the constraints imposed by B-meson decays, meson mixing, and invisible Higgs decays. Our principal finding reveals that a pseudoscalar with mass around 66 GeV and 
can account for the 
anomaly without conflicting with flavor physics.
© The Author(s) 2025
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Funded by SCOAP3.
