@article{oai:iwate-u.repo.nii.ac.jp:00015794,
 author = {ABE, Sachiho and CHO, Gi-Chol and MAWATARI, Kentarou},
 issue = {3},
 journal = {Physical Review D},
 month = {Aug},
 note = {We study a pseudoscalar dark-matter model arising from a complex singlet extension of the standard model (SM), and show that the dark-matter nucleon scattering is suppressed when two CP-even scalars are degenerate. In such a degenerate-scalar scenario we explore the model parameter space which satisfies constraints from the direct detection experiments and the relic density of dark matter. In addition, we discuss a possibility to verify such a scenario by using the recoil-mass technique at the International Linear Collider. We find that a pair of states separated by 0.2 GeV can be distinguished from the single SM-like Higgs state at 5σ with an integrated luminosity of 2 ab-1.},
 title = {Probing a degenerate-scalar scenario in a pseudoscalar dark-matter model},
 volume = {104},
 year = {2021}
}