Paper: May 04,2015
hep-ph
ID:1505.00491
Limiting two-Higgs-doublet models
Updating various theoretical and experimental constraints on the four
different types of two-Higgs-doublet models (2HDMs), we find that only the
"lepton-specific" (or "type X") 2HDM can explain the present muon (g-2) anomaly
in the parameter region of large $\tan\beta$, a light CP-odd Higgs boson, and
heavier CP-even and charged Higgs bosons which are almost degenerate. The
severe constraints on the models come mainly from the consideration of vacuum
stability and perturbativity, the electroweak precision data, $B$ physics
observables like $b\to s \gamma$ as well as the 125 GeV Higgs boson properties
measured at the LHC.
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Paper Author: Eung Jin Chun
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