Probing interacting dark energy and scattering of baryons with dark matter in light of the EDGES 21-cm signal

The EDGES experiment has observed an excess trough ($-500^{+200}_{-500}$ mK) in the brightness temperature $T_{21}$ of 21cm absorption line neutral Hydrogen atom (HI) from era cosmic dawn ($z \simeq 17.2$). We consider possible interaction Dark Matter and Energy fluid along with cooling off baryon matter by its collision to explain $T_{21}$. make use three different Matter-Dark (DM-DE) models taste viability those explaining results. evolution Hubble parameter is modified DM-DE interactions this also addressed work. This turn influences optical depth HI as well thus effects temperature. In addition we find that enables us explore varied mass regimes their viabilities terms satisfying result.