Halo formation from Yukawa forces in the very early Universe

DOI DOI Web Site Web Site Web Site 被引用文献1件 参考文献78件

この論文をさがす

説明

If long-range attractive forces exist and are stronger than gravity then cosmic halo formation can begin in the radiation-dominated era. We study a simple realization of this effect in a system where dark matter fermions have Yukawa interactions mediated by scalar particles, analogous to the Higgs boson in the standard model. We develop a self-consistent description of the system including exact background dynamics of the scalar field, and precise modelling of the fermion density fluctuations. For the latter, we provide accurate approximations for the linear growth as well as quantitative modelling of the nonlinear evolution using N-body simulations. We find that halo formation occurs exponentially fast and on scales substantially larger than simple estimates predict. The final fate of these halos remains uncertain, but could be annihilation, dark stars, primordial black holes, or even the existence of galaxy-sized halos at matter-radiation equality. More generally, our results demonstrate the importance of mapping scalar-mediated interactions onto structure formation outcomes and constraints for beyond the standard model theories.

22 pages + references, 13 figures

収録刊行物

  • Physical Review D

    Physical Review D 108 (10), 2023-11-29

    American Physical Society (APS)

被引用文献 (1)*注記

もっと見る

参考文献 (78)*注記

もっと見る

関連プロジェクト

もっと見る

キーワード

問題の指摘

ページトップへ