Is it possible to explain the muon and electron g − 2 in a Z ′ model?

In order to address this question, we consider a simple renormalizable and gauge invariant model in which the Z′ only has couplings to the electron and muon and their associated neutrinos, arising from mixing with a heavy vectorlike fourth family of leptons. Within this model we discuss the contribu...

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Bibliographic Details
Published in:Physical review. D Vol. 101; no. 11; p. 1
Main Authors: Hernández, A. E. Cárcamo, King, S. F., Lee, H., Rowley, S. J.
Format: Journal Article
Language:English
Published: College Park American Physical Society 01.06.2020
Subjects:
Anomalies
Couplings
Electrons
Leptons
Magnetic moments
Muons
Neutrinos
ISSN:2470-0010, 2470-0029
Online Access:Get full text
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Summary:In order to address this question, we consider a simple renormalizable and gauge invariant model in which the Z′ only has couplings to the electron and muon and their associated neutrinos, arising from mixing with a heavy vectorlike fourth family of leptons. Within this model we discuss the contributions to the electron and muon anomalous magnetic moments from Z′ exchange, subject to the constraints from μ → e γ and neutrino trident production. Using analytic and numerical arguments, we find that such a Z′ model can account for either the electron or the muon g − 2 anomalies, but not both, while remaining consistent with the experimental constraints from μ → eγ and neutrino trident production.
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ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.101.115016