ΛCDM or self-interacting neutrinos: How CMB data can tell the two models apart

Of the many proposed extensions to the $\mathrm{\ensuremath{\Lambda}}\mathrm{CDM}$ paradigm, a model in which neutrinos self-interact until close to the epoch of matter-radiation equality has been shown to provide a good fit to current cosmic microwave background (CMB) data, while at the same time a... View More