Details

Autor(en) / Beteiligte

• Xu, Weishuang Linda
• Dvorkin, Cora
• Chael, Andrew

Titel

Probing sub-GeV dark matter-baryon scattering with cosmological observables

Ist Teil von

• Physical review. D, 2018-05, Vol.97 (10), Article 103530

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We derive new limits on the elastic scattering cross section between baryons and dark matter using cosmic microwave background data from the Planck satellite and measurements of the Lyman-alpha forest flux power spectrum from the Sloan Digital Sky Survey. Our analysis addresses generic cross sections of the form σ∝vn, where v is the dark matter–baryon relative velocity, allowing for constraints on the cross section independent of specific particle physics models. We include high-ℓ polarization data from Planck in our analysis, improving over previous constraints. We apply a more careful treatment of dark matter thermal evolution than previously done, allowing us to extend our constraints down to dark matter masses of ∼MeV. We show in this work that cosmological probes are complementary to current direct detection and astrophysical searches.