W mass in a model with vector-like leptons and U(1)′
Junichiro Kawamura, Stuart Raby
We study the effects of vector-like leptons on the W boson mass in a model with a vector-like U(1)′ gauge symmetry. This model provides simultaneous explanations for the recent anomalies in the muon anomalous magnetic moment and the semi-leptonic decays of B mesons. We found that the recent result of the W boson mass precise measurement at CDF can be explained if the charged (neutral) vector-like lepton is lighter than 250 (80) GeV. The light vector-like leptons may not be excluded by collider experiments if these decay to a physical mode of the U(1)′ breaking scalar field.