Perturbative resonance in WIMP paradigm and its cosmological implications on cosmic reheating and primordial gravitational wave detection

We investigate the co-evolution of dark matter (DM) density perturbation and metric in WIMP paradigm. Instead adopting conventional assumption that DM starts out thermal equilibrium, we propose a simple phase production for paradigm extend our analysis to this phase. Being free from envelop an amplified perturbative resonance between scalar modes takes place during phase, consequently results suppression tensor-to-scalar ratio perturbation. By specifying cosmic background with typical realization reheating, establish relation particle mass mχ r paradigm, which also contains two reheating parameters, temperature TRf dissipative constant Γ0. Notably, sizeable parameter region candidate predicts smaller value comparing expectation obtained by assuming equilibrium. Once is measured future observations primordial gravitational wave CMB, can be used constrain mχ, Γ0 principle.