Neutrino masses,leptonic flavor mixing,and muon (g-2) in the seesaw model with the U(1)Lμ-Lτ gauge symmetry

• 作者: Shun Zhou
• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2022,（1）
• 所属期刊栏目: LETTERS
• 页码范围: 1-11
• 页数: 11页
• 语种: 英文
• DOI: 10.1088/1674-1137/ac2a25

摘要

The latest measurements of the anomalous muon magnetic moment aμ ≡ (gμ-2)/2 show a 4.2σ discrep-ancy between the theoretical prediction of the Standard Model and the experimental observations.To account for such a discrepancy,we consider a possible extension of the type-(Ⅰ+Ⅱ) seesaw model for neutrino mass generation with a gauged Lμ-Lτ symmetry.By explicitly constructing an economical model with only one extra scalar singlet,we demonstrate that the gauge symmetry U(1)Lμ-Lτ and its spontaneous breaking are crucial not only for explaining the muon (g-2) result but also for generating the neutrino masses and leptonic flavor mixing.Various phenomeno-logical implications and experimental constraints on the model parameters are also discussed.