scholarly journals Lepton-flavor-violating Higgs decay h → μτ and muon anomalous magnetic moment in a general two Higgs doublet model

2015 ◽  
Vol 2015 (5) ◽  
Author(s):  
Yuji Omura ◽  
Eibun Senaha ◽  
Kazuhiro Tobe
Keyword(s):  
Magnetic Moment ◽  
Anomalous Magnetic Moment ◽  
Higgs Doublet ◽  
Muon Anomalous Magnetic Moment ◽  
Lepton Flavor ◽  
Higgs Decay ◽  
Doublet Model ◽  
Two Higgs Doublet Model

scholarly journals Explaining g − 2 anomalies in two Higgs doublet model with vector-like leptons

2020 ◽  
Vol 2020 (11) ◽  
Author(s):  
Eung Jin Chun ◽  
Tanmoy Mondal
Keyword(s):  
Magnetic Moment ◽  
Anomalous Magnetic Moment ◽  
Magnetic Moments ◽  
Higgs Doublet ◽  
Light Particle ◽  
Muon Anomalous Magnetic Moment ◽  
Negative Contribution ◽  
Doublet Model ◽  
Pseudo Scalar ◽  
Two Higgs Doublet Model

Abstract We consider the two Higgs doublet model (2HDM) along with a generation of vector-like lepton doublet and singlet to explain the observed discrepancies in the electron and muon anomalous magnetic moments. The type-X (lepton-specific) 2HDM can allow a light pseudo-scalar which is known to explain the muon anomalous magnetic moment at two-loop. Such a light particle induces a sizable negative contribution to the electron anomalous magnetic moment at one-loop in the presence of vector-like leptons evading all the experimental constraints.

scholarly journals LEPTON-FLAVOR-VIOLATING τ DECAYS IN TWO-HIGGS-DOUBLET MODEL III

2010 ◽  
Vol 25 (25) ◽  
pp. 4827-4837 ◽  
Author(s):  
WEN-JUN LI ◽  
YING-YING FAN ◽  
LIN-XIA LÜ ◽  
SU-ZHI GAO ◽  
GONG-WEI LIU
Keyword(s):  
Perturbation Theory ◽  
Parameter Space ◽  
Chiral Perturbation Theory ◽  
Higgs Doublet ◽  
Higgs Bosons ◽  
Chiral Perturbation ◽  
Model Parameter ◽  
Lepton Flavor ◽  
Doublet Model ◽  
Two Higgs Doublet Model

We study the lepton-flavor-violating processes of τ- → μ-PP decays with PP = K+K-, [Formula: see text], π+π-, π0π0 in the framework of two-Higgs-doublet model III by virtue of the chiral perturbation theory. In this model, only three neutral Higgs bosons contribute to these decays. With the current experimental constraints, we show that (a) the contributions of the |λuu(dd)| term are very small for these four decays; (b) we get the correlation between |λss| and |λτμ|; for |λτμ| ~ 10–400, one has |λss| ~ 40–1; (c) in the existing model parameter space, Br (τ- → μ- K+K-) could reach the order of [Formula: see text], but Br (τ → μ-π+π-/π0π0) are too small to be observed.

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