Light Thermal Dark Matter Beyond $p$-Wave Annihilation in Minimal Higgs Portal Model

Yu-Tong Chen, Shigeki Matsumoto, Tian-Peng Tang +2

This study explores a minimal renormalizable dark matter (DM) model, incorporating a sub-GeV Majorana DM and a singlet scalar particle $\varphi$. Using scalar and pseudo-scalar interacti…