Standard Model anomalies and vacuum stability for lepton portals with extra $U(1)$ symmetry

Carlo Branchina, Hyun Min Lee, Kimiko Yamashita

Recently, the experimental values of the muon $(g-2{)}_{\mu }$ and of the $W$ boson mass $m_{{}_W}$ have both indicated significant deviations from the SM predictions, motivating the explor…