2019/03/31 by Chuan-Hung Chen, Takaaki Nomura
Physics and Astronomy · #Anomalous magnetic dipole moment #Electron #Electroweak interaction #Higgs boson #High-Energy Particle Collisions Research #Lepton #Muon #Muon capture #Neutrino #Neutrino Physics Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.100.015024
published as Phys. Rev. D 100, 015024 (2019) · 26 pages, 10 figures, version published in PRD
openalex publication_date 2019/07/17 · arxiv created 2019/07/18 · openalex created_date 2019/07/23 · arxiv updated 2019/07/24 · openalex updated_date 2026/08/05
A simple extension of Ma's approach in a scotogenic model is studied for the purpose of simultaneously interpreting the neutrino data and the excess of the muon anomalous magnetic moment (muon g\ensuremath-2). The feasible minimal extension is to add a Z2-odd vectorlike lepton doublet to the Ma's model. It is found that in addition to the neutrino data, the strict constraints on the relevant parameters are from the electroweak oblique parameters and the induced lepton-flavor violation processes, such as \ensuremathℓi\ensuremath→\ensuremathℓj\ensuremathγ and \ensuremathℓi\ensuremath→\ensuremathℓj^\ensuremath-\ensuremathℓj^\ensuremath-\ensuremathℓj+. Performing a parameter scan, we numerically demonstrate that when the constraint conditions are satisfied, the muon g\ensuremath-2 of O(10^\ensuremath-9) can be achieved, where it can be expected that with a 5\ensuremathσ observation, the Muon g\ensuremath-2 experiment at Fermilab can observe a_\ensuremathμ\ensuremath≈13.31\ifmmode×\else\texttimes\fi10^\ensuremath-10 when the current experiment and the SM errors are reduced by a factor of 4 and 2, respectively. Moreover, the branching ratio of the \ensuremathτ\ensuremath→\ensuremathμ\ensuremathγ decay can match the Belle II sensitivity of O(10^\ensuremath-9) with an integrated luminosity of 50 ab^\ensuremath-1.