Search

In this work, we investigate the muon anomalous dipole moment $a_\mu$ in a model that extends the Standard Model with a scalar triplet and a vector-like lepton triplet. Different from previous studies, we find that there is still viable parameter space in this model to explain the discrepancy $\Delta a_\mu=a_{\mu}(\mathrm{Exp})-a_{\mu}(\mathrm{SM})$. While being consistent with the current data of neutrino mass, precision electroweak measurements and the perturbativity of couplings, our model can provide new physics contribution $a_\mu^\textrm{NP}$ to cover the central region of $\Delta a_\mu$ with new scalar and fermion mass as low as around TeV. This mass scale is allowed by the current collider searches for doubly charged scalars and vector-like leptons, and they can be tested at future high energy and/or high luminosity colliders., Comment: 19 pages, 4 captioned figures, comments are welcome