2022/10/20 by W. L. Chang, Chang, We-Fu
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.2210.11097
openalex publication_date 2022/10/20 · openalex created_date 2022/10/24 · openalex updated_date 2026/07/28
We construct a novel flavor-dependent gauged lepton number U(1)_ℓ model for the hierarchical charged lepton masses and the observed (g-2)e,μ. Only tau participates in the tree-level Standard Model ( SM ) Yukawa interaction. At the same time, the masses of electron and muon are light due to radiative generation and(or) the heavy-mediator-suppressed Yukawa coupling to the SM Higgs. Not only can the measured anomalous magnetic dipole moment of the muon, \triangle aμ, be explained, but the positive (or negative) \triangle ae can also be accommodated in this model. Without additional discrete symmetries introduced, charged lepton flavor violation is highly suppressed by the U(1)_ℓ symmetry. Corresponding to two equally viable U(1)_ℓ charge assignments, this model predicts either AFBμAFBτ>AFBe, which can be tested at the e+e- machines before discovering the U(1)_ℓ gauge boson. Moreover, the effective muon and electron Yukawa couplings can depart significantly from the SM predictions, and those deviations could be probed at future e+e- colliders and High-Luminosity LHC.