Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Vector-like Leptons: Muon g-2 Anomaly, Lepton Flavor Violation, Higgs
  Decays, and Lepton Non-Universality   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 $R_{K^{*0}}$.

23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol