Power-aligned 2HDM: a correlative perspective on (g − 2)e,μ

• Published in: The journal of high energy physics Vol. 2021; no. 1; pp. 1 - 23
• Main Authors: Li, Shao-Ping, Li, Xin-Qiang, Li, Yuan-Yuan, Yang, Ya-Dong, Zhang, Xin
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.01.2021; Springer Nature B.V; SpringerOpen
• Subjects: Anomalies; Beyond Standard Model; Classical and Quantum Gravitation; Couplings; Elementary Particles; Flavors; Higgs Physics; High energy physics; Hypotheses; Leptons; Magnetic moments; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Quarks; Regular Article - Theoretical Physics; Relativity Theory; String Theory; Symmetry; Beyond Standard Model; Higgs Physics
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP01(2021)034

A bstract With the hypothesis of minimal flavor violation, we find that there exists a power-aligned relation between the Yukawa couplings of the two scalar doublets in the two-Higgs-doublet model with Hermitian Yukawa matrices. Within such a power-aligned framework, it is found that a simultaneous explanation of the anomalies observed in the electron and muon anomalous magnetic moments can be reached with TeV-scale quasi-degenerate Higgs masses, and the resulting parameter space is also phenomenologically safer under the B-physics, Z and τ decay data, as well as the current LHC bounds. Furthermore, the flavor-universal power that enhances the charged-lepton Yukawa couplings prompts an interesting correlation between the two anomalies, which makes the model distinguishable from the (generalized) linearly aligned and the lepton-specific two-Higgs-doublet models that address the same anomalies but in a non-correlative manner, and hence testable by future precise measurements.