Muon (g − 2) and flavor puzzles in the U(1)X-gauged leptoquark model

• Published in: The journal of high energy physics Vol. 2022; no. 8; pp. 243 - 33
• Main Author: Wang, Xin
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 11.08.2022; Springer Nature B.V; SpringerOpen
• Subjects: Anomalies; Beyond Standard Model; Classical and Quantum Gravitation; Collaboration; Constraint modelling; Economic models; Elementary Particles; Flavor (particle physics); Heavy Quark Physics; High energy physics; Leptons; Magnetic moments; Muons; Neutrino Physics; Numerical analysis; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Quarks; Regular Article - Theoretical Physics; Relativity Theory; String Theory; Symmetry; Neutrino Physics; Heavy Quark Physics; Beyond Standard Model
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP08(2022)243

A bstract We present an economical model where an S 1 leptoquark and an anomaly-free U(1) X gauge symmetry with X = B 3 − 2 L μ / 3 − L τ / 3 are introduced, to account for the muon anomalous magnetic moment a μ ≡ ( g μ − 2) and flavor puzzles including R K ∗ and R D ∗ anomalies together with quark and lepton flavor mixing. The Z ′ gauge boson associated with the U(1) X symmetry is responsible for the R K ∗ anomaly. Meanwhile, the specific flavor mixing patterns of quarks and leptons can be generated after the spontaneous breakdown of the U(1) X gauge symmetry via the Froggatt-Nielsen mechanism. The S 1 leptoquark which is also charged under the U(1) X gauge symmetry can simultaneously explain the latest muon ( g − 2) result and the R D ∗ anomaly. In addition, we also discuss several other experimental constraints on our model.