Maximum value of the spin-independent cross section in the THDM+a

Tomohiro Abe, Motoko Fujiwara, Junji Hisano +1

We investigate the maximum value of the spin-independent cross section (${\sigma }_{\text{SI}}$) in a dark matter (DM) model called the two-Higgs doublet model + a (THDM+a). This model can e…