Vector-like Leptons: Muon g-2 Anomaly, Lepton Flavor Violation, Higgs Decays, and Lepton Non-Universality

Abstract

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, $R_{K^{\ast 0}}$. 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 $⟨{\lambda }_e/{\lambda }_{\mu }⟩\lesssim 10^{-4}$. We also find that our model cannot fit the observed value of $R_{K^{\ast 0}}$.

arXiv comment24 pages, 8 figures, 2 tables

References in corpus (16)

• Test of lepton universality using $B^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ decays
• The Anatomy of Electro-Weak Symmetry Breaking. I: The Higgs boson in the Standard Model
• Package-X: A Mathematica package for the analytic calculation of one-loop integrals
• Effective Hamiltonian for $B \ra X_s e^+ e^-$ Beyond Leading Logarithms in the NDR and HV Schemes
• Photonic penguins at two loops and m_t-dependence of BR[ B -> X_s l^+ l^-]
• Effects of new leptons in Electroweak Precision Data
• General formulae for f1 --> f2 gamma
• Vector-like leptons: Higgs decays and collider phenomenology
• Explanation of the Muon g-2 Anomaly with Vectorlike Leptons and its Implications for Higgs Decays
• Vectorlike leptons at the Large Hadron Collider
• Dark Matter and Enhanced Higgs to Di-photon Rate from Vector-like Leptons
• Survey of vector-like fermion extensions of the Standard Model and their phenomenological implications
• Limits on Vectorlike Leptons from Searches for Anomalous Production of Multi-Lepton Events
• Vectorlike Fermions and Higgs Couplings
• Phenomenology of heavy vector-like leptons
• The Muon g-2 experiment at Fermilab

Cited by in corpus (46)

• New physics explanations of $a_{\mu }$ in light of the FNAL muon $g-2$ measurement
• Generic Loop Effects of New Scalars and Fermions in $b\to s{\ell }^{+}{\ell }^{-}$, $(g-2{)}_{\mu }$ and a Vector-like $4^{\mathrm{th}}$ Generation
• Complete Vector-like Fourth Family and new $\mathrm{U}(1{)}^{\prime }$ for Muon Anomalies
• Flavourful $Z^{\prime }$ portal for vector-like neutrino Dark Matter and $R_{K^{(\ast )}}$
• Prospects for vectorlike leptons at future proton-proton colliders
• Dark matter contribution to $b\to s{\mu }^{+}{\mu }^{-}$ anomaly in local $U(1{)}_{L_{\mu }-L_{\tau }}$ model
• flavio: a Python package for flavour and precision phenomenology in the Standard Model and beyond
• Impact of the $b\to sll$ anomalies on dark matter physics
• A minimal flavored $U(1{)}^{\prime }$ for $B$-meson anomalies
• Kinetic Mixing and Portal Matter Phenomenology
• $(\mathbf{g}-2{)}_{\mathbf{e},\mathbf{\mu }}$ in an extended inverse type-III seesaw
• Complete Vector-like Fourth Family with ${\mathrm{U}(1)}^{\prime }$: A Global Analysis
• Vector-Like Leptons and Inert Scalar Triplet: Lepton Flavor Violation, $g-2$ and Collider Searches
• Muon $g-2$ and CKM Unitarity in Extra Lepton Models
• Implications of hidden gauged $U(1)$ model for $B$ anomalies
• A nonunitary interpretation for a single vector leptoquark combined explanation to the $B$-decay anomalies
• Towards A UV-Model of Kinetic Mixing and Portal Matter
• Leptonic anomalous magnetic moments in $\nu$SMEFT
• Di-Higgs and tri-Higgs boson signals of muon $g-2$ at a muon collider
• Electroweak Baryogenesis with Vector-like Leptons and Scalar Singlets
• Dark matter for $b\to s{\mu }^{+}{\mu }^{-}$ anomaly in a gauged $U(1{)}_X$ model
• New physics interpretation of $W$-boson mass anomaly
• Magnetic Moments of Leptons, Charged Lepton Flavor Violations and Dark Matter Phenomenology of a Minimal Radiative Dirac Neutrino Mass Model
• The Ellipse of Muon Dipole Moments
• $W$ mass in a model with vector-like leptons and $U(1{)}^{\prime }$
• Spontaneous Twin Symmetry Breaking
• Probing Heavy Neutrino Magnetic Moments at the LHC using Long-Lived Particle Searches
• Probing New Physics in the Vector-like Lepton Model by Lepton Electric Dipole Moments
• Current status on pair-produced muon-philic vectorlike leptons in multilepton channels at the LHC
• The Muon Magnetic Moment and Physics Beyond the Standard Model
• Collider Signatures of a Scalar Leptoquark and Vector-like Lepton in Light of Muon Anomaly
• Leptonic CP violation from a vector-like lepton
• Explaining Xenon-1T signal with FIMP dark matter and neutrino mass in a $U(1{)}_X$ extension
• Interplay of inert doublet and vector-like lepton triplet with displaced vertices at the LHC/FCC and MATHUSLA
• Long-lived Searches of Vector-like Lepton and Its Accompanying Scalar at Colliders
• Scalar triplet leptogenesis in the presence of right-handed neutrinos with S3 symmetry
• High Energy Physics and Cosmology at the Unification Frontier: Opportunities and Challenges in the coming years
• Resolving Muon g-2 Anomaly With Partial Compositeness
• Observables of low-lying supersymmetric vectorlike leptonic generations via loop corrections
• Collider imprint of vector-like leptons in light of anomalous magnetic moment and neutrino data
• The Two Scales of New Physics in Loop-Induced Higgs Couplings
• On-shell Renormalization with Vector-like Leptons, One-loop Muon-Higgs Coupling and Muon g-2
• $\ge 4\mu$ signal from a vector-like lepton decaying to a muon-philic $Z^{\prime }$ boson at the LHC
• Dark Matter and Muon $g-2$ Anomaly via Scale Symmetry Breaking
• From Higgs physics to lepton flavour violation: current bounds and future prospects for vector-like lepton models
• Fractionary Charged Particles Confronting Lepton Flavor Violation and the Muon's Anomalous Magnetic Moment