Constraints on Dark Matter-Neutrino Interaction from 21-cm Cosmology and Forecasts on SKA1-Low

TL;DR

This paper investigates how dark matter-neutrino interactions affect reionization, constrains their strength using 21 cm cosmology, and forecasts detectability with the upcoming SKA1-Low telescope.

Contribution

It provides new constraints on dark matter-neutrino interactions using 21 cm data and forecasts their potential detection with SKA1-Low.

Findings

21 cm observations tightly constrain DM-neutrino interaction strength.

21 cm data surpass current constraints by several orders of magnitude.

Forecasts suggest SKA1-Low can detect or further constrain these interactions.

Abstract

In this article, we have done a thorough investigation of the possible effects of interaction between dark matter (DM) and neutrinos on reionization history. We have constrained the interaction strength using 21 cm Cosmology and found out possible deviations from standard, non-interacting $\Lambda$CDM scenario. Comparing the results with the existing constraints from present cosmological observations reveals that 21 cm observations are more competent to constrain the interaction strength by a few orders of magnitude. We have also searched for prospects of detecting any such interaction in the upcoming 21 cm mission SKA1-Low by doing a forecast analysis and error estimation.