Complete vectorlike fourth family and new U(1)' for muon anomalies

Kawamura, Junichiro; Raby, Stuart; Trautner, Andreas

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Complete vectorlike fourth family and new U(1)' for muon anomalies

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Trautner, Andreas
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Kawamura, J., Raby, S., & Trautner, A. (2019). Complete vectorlike fourth family and new U(1)' for muon anomalies. Physical Review D, 100(5): 055030.

Cite as: https://hdl.handle.net/21.11116/0000-0005-505C-A

Abstract

We consider the Standard Model (SM) with the addition of a U(1)' gauge symmetry and a complete fourth family of quarks and leptons which are vectorlike with respect to the full SU(3)(C) x SU(2)(L) x U(1)(Y) x U(1)' gauge symmetry. The model provides a unified explanation of experimental anomalies in (g - 2)(mu) as well as b -> sl(+) l(-) decays. We find good fits to the deviations from the SM, while at the same time fitting all other SM observables. The model includes a new Z' gauge boson, a U(1)'-breaking scalar, and vectorlike leptons all with mass of order a few hundred giga-electron-volts. It is consistent with all currently released high energy experimental data; however, it appears imminently testable with well-designed future searches. Also, precision flavor experiments, especially more accurate direct determinations of Cabibbo-Kobayashi-Maskawa matrix elements, would allow probing the best fit points.