Large scale structures and dark fifth forces

          @misc{ scivideos_PIRSA:24020079,
            doi = {10.48660/24020079},
            url = {https://pirsa.org/24020079},
            author = {Costa, Marco},
            keywords = {Cosmology},
            language = {en},
            title = {Large scale structures and dark fifth forces},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2024},
            month = {feb},
            note = {PIRSA:24020079 see, \url{https://scivideos.org/pirsa/24020079}}
          }
          

Abstract

Cosmology can give insights on the self-interactions of Dark Matter. In this talk we analyze how long range forces acting solely in the Dark Sector imprint on the distribution of galaxies, the so-called Large Scale Structure (LSS). First we show how BOSS data can complement CMB information and give the strongest constraint on the strength of the self interaction. In particular we discuss how the long range force affects the galaxy power spectrum and how the theory of LSS is changed in its presence. Finally we forecast that data from future surveys (Euclid, MegaMapper) can improve the bound by roughly one order of magnitude. We also mention how higher point statistics can potentially contain relevant information on the enhanced clustering.