Testing 3+1 and 3+2 neutrino mass models with cosmology and short   baseline experiments
  Recent results from short--baseline neutrino oscillation experiments and Cosmic Microwave Background anisotropy measurements suggest the presence of additional sterile neutrinos. In this paper we properly combine these data sets to derive bounds on the sterile neutrino masses in the 3+1 and 3+2 frameworks, finding a potentially good agreement between the two datasets. However, when galaxy clustering is included in the analysis a tension between the oscillation and cosmological data is clearly present. 
Maria Archidiacono, Nicolao Fornengo, Carlo Giunti, Alessandro   Melchiorri
astro-ph.CO hep-ph