Weighing Neutrinos with Large-Scale Structure
  While it is established that the effect of neutrinos on the evolution of cosmic structure is small, the upper limits derived from large-scale structure could help significantly to constrain the absolute scale of the neutrino masses. Current results from cosmology set an upper limit on the sum of the neutrino masses of ~ 1 eV, somewhat depending on the data sets used in the analyses and assumed priors on cosmological parameters. In this review we discuss the effects of neutrinos on large-scale structure which make these limits obtainable. We show the impact of neutrino masses on the matter power spectrum, the cosmic microwave background and the clustering amplitude. A summary of derived cosmological neutrino mass upper limits is given, and we discuss future methods which will improve the mass upper limits by an order of magnitude. 
Ofer Lahav (UCL) and Oystein Elgaroy (Oslo U.)