New fermions in the light of the (g − 2)μ

被引:0
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作者
Djouadi, A. [1 ,2 ]
Criado, J.C. [3 ]
Koivunen, N. [2 ]
Müürsepp, K. [2 ]
Raidal, M. [2 ]
Veermäe, H. [2 ]
机构
[1] CAFPE and Departamento de Física Teórica y del Cosmos, Universidad de Granada, Granada, Spain
[2] Laboratory of High Energy and Computational Physics, NICPB, Tallinn, Estonia
[3] Institute for Particle Physics Phenomenology, Department of Physics, Durham University, Durham, United Kingdom
基金
英国科学技术设施理事会;
关键词
Charged particles - Dielectric properties - Quantum theory;
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摘要
The very precise measurement of the anomalous magnetic moment of the muon, recently released by the Muon g-2 experiment at Fermilab, can serve to set stringent constraints on new particles. If the observed 4σ discrepancy from the Standard Model value is indeed real, it will set a tight margin on the scale of the masses and couplings of these particles. Instead, if the discrepancy is simply a result of additional theoretical and experimental uncertainties to be included, strong constraints can be put on their parameters. In this mini-review, we summarize the impact of the latest muon g-2 measurement on new fermions that are predicted by a wide range of new physics models and with exotic quantum numbers and interactions. We will particularly discuss the case of vector-like leptons, excited leptons, and supersymmetric fermions, as well as spin-3/2 isosinglet fermions, which have been advocated recently. Copyright © 2022 Djouadi, Criado, Koivunen, Müürsepp, Raidal and Veermäe.
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