Vector-like Leptons: Muon g-2 Anomaly, Lepton Flavor Violation, Higgs Decays, and Lepton Non-Universality
| Autor: | Zijie Poh, Stuart Raby |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Particle physics Muon Anomalous magnetic dipole moment 010308 nuclear & particles physics Physics beyond the Standard Model Electroweak interaction High Energy Physics::Phenomenology FOS: Physical sciences Coupling (probability) 01 natural sciences Standard Model Nuclear physics High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) 0103 physical sciences Higgs boson High Energy Physics::Experiment 010306 general physics Lepton |
| DOI: | 10.48550/arxiv.1705.07007 |
| Popis: | In this paper, we consider the Standard Model (SM) with one family of vector-like (VL) leptons, which couple to all three families of the SM leptons. We study the constraints on this model coming from the heavy charged lepton mass bound, electroweak precision data, the muon anomalous magnetic moment, lepton flavor violation, Higgs decay constraints and a recently measured lepton non-universality observable, $R_{K^{*0}}$. We find that the strongest constraints are coming from the muon $g-2, \ R_{\mu\mu}=\Gamma(h\to\mu\mu)/\Gamma(h\to\mu\mu)_\text{SM}, \ R_{\gamma\gamma}$ and $\text{BR}(\mu\to e\gamma)$. Although VL leptons couple to all three families of the SM leptons, the ratio of electron-VL to muon-VL coupling is constrained to be $\langle\lambda_e/\lambda_\mu\rangle\lesssim10^{-4}$. We also find that our model cannot fit the observed value of $R_{K^{*0}}$. Comment: 24 pages, 8 figures, 2 tables |
| Databáze: | OpenAIRE |
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