PIRSA:26040115 Conference Cosmology

DOI10.48660/26040115

Conference/School: Cosmological Frontiers in Fundamental Physics 2026

Costa, M. (2026). Dark Matter Long Range Forces. Perimeter Institute. https://pirsa.org/26040115

Costa, Marco. Dark Matter Long Range Forces. Perimeter Institute, Apr. 27, 2026, https://pirsa.org/26040115 

@misc{ pirsa_PIRSA:26040115,
  doi = {10.48660/26040115},
  url = {https://pirsa.org/26040115},
  author = {Costa, Marco},
  keywords = {Cosmology},
  language = {en},
  title = {Dark Matter Long Range Forces},
  publisher = {Perimeter Institute},
  year = {2026},
  month = {apr},
  note = {PIRSA:26040115 see, \url{https://pirsa.org}}
}

Abstract

In this talk we describe how future cosmological observation can constrain long-range dark matter forces scenarios in which the new interaction acts only in the Dark Sector. We briefly summarize the effect of the new force on the CMB and galaxy surveys, and how these observables constrain long range forces (with interaction lengths up to 100 kpc ) to be weaker than few percent the strength of gravity. We conclude by mentioning an unintuitive result regarding slower structure formation in presence of this extra attractive force, and its consequences for lensing observables.

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