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Title: Vectorlike leptons: Muon g - 2 anomaly, lepton flavor violation, Higgs boson decays, and lepton nonuniversality

Abstract

Here, we discuss the Standard Model (SM) with one family of vectorlike (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 boson decay constraints, and a recently measured lepton nonuniversality observable, R K * 0 , along with R K . We find that the strongest constraints are coming from the muon g - 2 , R μ μ = Γ ( h μ μ ) / Γ ( h μ μ ) SM , R γ γ and BR ( μ e γ ) . While VL leptons couple to all three families of the SM leptons, the ratio of electron-VL to muon-VL coupling is constrained to be λ e / λ μ 10 - 4 . We also find that this model cannot fit the lepton nonuniversality discrepancies.

Authors:
 [1];  [1]
  1. The Ohio State Univ., Columbus, OH (United States)
Publication Date:
Research Org.:
The Ohio State Univ., Columbus, OH (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
OSTI Identifier:
1602496
Alternate Identifier(s):
OSTI ID: 1372933
Grant/Contract Number:  
SC0011726
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 96; Journal Issue: 1; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Poh, Zijie, and Raby, Stuart. Vectorlike leptons: Muon g-2 anomaly, lepton flavor violation, Higgs boson decays, and lepton nonuniversality. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.96.015032.
Poh, Zijie, & Raby, Stuart. Vectorlike leptons: Muon g-2 anomaly, lepton flavor violation, Higgs boson decays, and lepton nonuniversality. United States. doi:10.1103/PhysRevD.96.015032.
Poh, Zijie, and Raby, Stuart. Wed . "Vectorlike leptons: Muon g-2 anomaly, lepton flavor violation, Higgs boson decays, and lepton nonuniversality". United States. doi:10.1103/PhysRevD.96.015032. https://www.osti.gov/servlets/purl/1602496.
@article{osti_1602496,
title = {Vectorlike leptons: Muon g-2 anomaly, lepton flavor violation, Higgs boson decays, and lepton nonuniversality},
author = {Poh, Zijie and Raby, Stuart},
abstractNote = {Here, we discuss the Standard Model (SM) with one family of vectorlike (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 boson decay constraints, and a recently measured lepton nonuniversality observable, RK*0, along with RK. We find that the strongest constraints are coming from the muon g-2, Rμμ=Γ(h→μμ)/Γ(h→μμ)SM, Rγγ and BR(μ→eγ). While VL leptons couple to all three families of the SM leptons, the ratio of electron-VL to muon-VL coupling is constrained to be 〈λe/λμ〉≲10-4. We also find that this model cannot fit the lepton nonuniversality discrepancies.},
doi = {10.1103/PhysRevD.96.015032},
journal = {Physical Review D},
issn = {2470-0010},
number = 1,
volume = 96,
place = {United States},
year = {2017},
month = {7}
}

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Cited by: 8 works
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