The nearly aligned Higgs Effective Field Theory (naHEFT) is based on the general
assumption: all deviations in the Higgs boson couplings are originated from quantum one …

We calculate the two-loop mixed QCD $\otimes $ EW corrections for the charged Higgs
boson pair production within the framework of four types of Two Higgs Doublet Models …

We briefly introduce H-COUP_3. 0, which we developed for evaluating higher-order
corrections to any Higgs boson decays in various extended Higgs sectors. Focusing on two …

One of the most straightforward extensions of the standard model (SM) is having an
additional Higgs doublet to the SM, namely the two Higgs doublet models (THDM). In the …

We extend the Zee model by introducing a vector-like lepton doublet and a flavor dependent
global U (1) symmetry. Flavor changing neutral currents in the quark sector can be naturally …

The lepton number and flavor violations are important possible ingredients of the lepton
physics. The neutrinoless double beta decay and the transition of the muonium into …

In this chapter, we discuss the complementarity between direct searches for additional Higgs
bosons at the (HL-) LHC and precision measurements of the Higgs boson properties at …

The isospin doublet scalar field with hypercharge 3/2 is introduced in some new physics
models such as tiny neutrino masses. Detecting the doubly charged scalar bosons from the …

Although the standard model (SM) in particle physics is consistent with the results in collider
experiments, it cannot explain several cosmological observations such as the baryon …

The e+ e-→ h Z process is the dominant production process at the early stage of the future
lepton colliders such as the ILC, and the production cross section will be measured with a …