Author(s): Hovav Lazare, Ely D. Kovetz, Kimberly K. Boddy, and Julian B. Muñoz Scattering between dark matter (DM) and protons leads to suppressed small-scale fluctuations, with implications for a variety of cosmological observables. In this Letter, we search for evidence of DM-proton scattering with an interaction cross section $σ={σ}_{0}(v/c{)}^{n}$ for $n=0$, 2 and 4, corre… [Phys. Rev. Lett. 137, 011001] Published Tue Jun 30, 2026