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A bstract This study explores a minimal renormalizable dark matter (DM) model, incorporating a sub-GeV Majorana DM and a singlet scalar particle ϕ . Using scalar and pseudo-scalar interactions (couplings c s and c p ), we investigate implications for DM detection, considering s -wave, p -wave, and combined ( s + p wave) contributions in DM annihilation cross-section, as well as loop-correction contributions to DM-nucleon elastic scattering. Identifying a broad parameter space (10 MeV 1 GeV; (iii) the preferred ϕ -resonance region can be tested in the future indirect detection experiments, such as e-ASTROGAM.
Chen et al. (Fri,) studied this question.