(Lack of) Cosmological evidence for dark radiation after Planck
(Lack of) Cosmological evidence for dark radiation after Planck
We use Bayesian model comparison to determine whether extensions to Standard-Model neutrino physics — primarily additional effective numbers of neutrinos and/or massive neutrinos — are merited by the latest cosmological data. Given the significant advances in cosmic microwave background (CMB) observations represented by the Planck data, we examine whether Planck …