Speaker
Description
We consider a simple extension of the Standard Model with a vector-like lepton and U(1)’ gauge symmetry motivated by the recent experimental anomalies in the muon g-2 and the W boson mass. After the U(1)’ symmetry is spontaneously broken, the mixings between the muon and the vector-like lepton and between the Z boson and the U(1)’ gauge boson arise. As a result, we obtain the desirable corrections to the muon g-2 and the W boson mass. For the muon g-2 contribution, a natural choice for the bare mass of the muon leads the robustness with respect to the vector-lepton mass thanks to the seesaw mechanism for the lepton masses. We extend our U(1)’ gauge symmetry model to an SU(2) dark gauge symmetry model that accommodates a vector dark matter candidate.
