3 papers
hep-ph2026
Two Higgs doublet model with a complex singlet scalar and Multi-critical Point Principle
Gi-Chol Cho, Chikako Idegawa, Chiaki Nose
We study a two Higgs doublet model extended by a complex singlet scalar, in which the imaginary part of the singlet serves as a dark matter (DM) candidate. In this model, degenerat…
hep-ph2024
Degenerate scalar scenario of two Higgs doublet model with a complex singlet scalar
Gi-Chol Cho, Chikako Idegawa
We study the two Higgs doublet model with a complex singlet scalar whose imaginary part acts as dark matter (DM). The scattering of DM and quarks, mediated by three CP-even scalars…
hep-ph2023
A complex singlet extension of the Standard Model with a singlet fermion dark matter
Gi-Chol Cho, Chikako Idegawa, Rie Inumiya
We examine a complex singlet scalar extension of the Standard Model (CxSM) with an extra singlet fermion. Both the singlet scalar and fermion are dark matter (DM) candidates. It is…