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

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arxiv 2009.08314 v2 pith:3D2EEEUI submitted 2020-09-17 hep-ph

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

classification hep-ph
keywords anomalousdoubletmagneticvector-likeelectronexplainhiggsleptons
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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    In a 3-4-1 model with minimal inverse seesaw, strong correlations are predicted between (g-2) anomalies and LFV decay rates, with the tau to muon gamma decay bound limiting the muon anomaly deviation to 10^{-9}.