http://arxiv.org/abs/2303.17947
Nontrivial dark sector physics continues to be an interesting avenue in our quest to the nature of dark matter. In this paper, we study the cosmological signatures of mass-varying dark matter where its mass changes from zero to a nonzero value in the early Universe. We compute the changes in various observables, such as, the matter and the cosmic microwave background anisotropy power spectrum. We explain the origin of the effects and point out a qualitative similarity between this model and a warm dark matter cosmology with no sudden mass transition. We also do a simple frequentist analysis of the linear matter power spectrum to estimate the constraint on the parameters of this model from latest cosmological observation data.
A. Das, S. Das and S. Sethi
Mon, 3 Apr 23
23/53
Comments: 7 pages, 6 figures