Complete vectorlike fourth family and new U(1)${}^{\prime }$ for muon anomalies

Abstract

I introduce a model to explain the recent anomalies in the muon anomalous magnetic moment and the rare semi-leptonic $B$ meson decays. The Standard Model is extended by a $U(1{)}^{\prime }$ gauge symmetry and a complete fourth family fermions which are vector-like under the gauge symmetry. We found parameter points which can explain the anomalies consistently with the other observables. We then propose an interesting possibility to have signals with four muons or more from vector-like lepton pair production.

Comments: 6 pages, 3 figures, 2 tables, contribution to the proceedings of the 20th Lomonosov conference, Moscow, August 2021; v2 references added