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Advances in High Energy Physics
Volume 2012, Article ID 608515, 34 pages
Review Article

Neutrino Mass from Cosmology

1Theory Division, CERN, 1211 Geneva 23, Switzerland
2Institut de Théorie des Phénomènes Physiques, EPFL, 1015 Lausanne, Switzerland
3LAPTH, CNRS-Université de Savoie, BP 110, 74941 Annecy-le-Vieux Cedex, France
4Instituto de Física Corpuscular, CSIC-Universitat de València, Apartado de Correos 22085, 46071 Valencia, Spain

Received 2 July 2012; Accepted 1 October 2012

Academic Editor: Jose Bernabeu

Copyright © 2012 Julien Lesgourgues and Sergio Pastor. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Neutrinos can play an important role in the evolution of the universe, modifying some of the cosmological observables. In this contribution we summarize the main aspects of cosmological relic neutrinos, and we describe how the precision of present cosmological data can be used to learn about neutrino properties, in particular their mass, providing complementary information to beta decay and neutrinoless double-beta decay experiments. We show how the analysis of current cosmological observations, such as the anisotropies of the cosmic microwave background or the distribution of large-scale structure, provides an upper bound on the sum of neutrino masses of order 1 eV or less, with very good perspectives from future cosmological measurements which are expected to be sensitive to neutrino masses well into the sub-eV range.