$\nu$-Two Higgs Doublet Model and its Collider Phenomenology

Understand

Smallness of neutrino masses can be explained by introducing a tiny vacuum expectation value of an extra-Higgs doublet which couples to right-handed neutrinos ($N_R$).

• This situation is naturally realized in $\nu$-Two Higgs Doublet Model ($\nu$THDM), where a TeV-scale seesaw mechanism can work well.
• We investigate observable phenomenology of $\nu$THDM at LHC and ILC experiments.
• Charged Higgs boson ($H^\pm$) in $\nu$THDM is almost originated from the extra-Higgs doublet and its coupling strength to neutrinos are not small.