2005/11/30 by J. Lesgourgues, Julien Lesgourgues, Laurence Perotto +4
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Cosmology and Gravitation Theories #Radio Astronomy Observations and Technology #astro-ph #hep-ph
paper · pdf · doi:10.1103/physrevd.73.045021
published as Phys.Rev.D73:045021,2006 · 13 pages, 4 figures. One new figure and references added. Version accepted for publication
arxiv created 2006/02/01 · openalex publication_date 2006/02/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We evaluate the ability of future cosmic microwave background (CMB) experiments to measure the power spectrum of large scale structure using quadratic estimators of the weak lensing deflection field. We calculate the sensitivity of upcoming CMB experiments such as BICEP, QUaD, BRAIN, ClOVER and Planck to the nonzero total neutrino mass M_\ensuremathν indicated by current neutrino oscillation data. We find that these experiments greatly benefit from lensing extraction techniques, improving their one-sigma sensitivity to M_\ensuremathν by a factor of order four. The combination of data from Planck and the SAMPAN mini-satellite project would lead to \ensuremathσ(M_\ensuremathν)\ensuremath∼0.1 eV, while a value as small as \ensuremathσ(M_\ensuremathν)\ensuremath∼0.035 eV is within the reach of a space mission based on bolometers with a passively cooled 3--4 m aperture telescope, representative of the most ambitious projects currently under investigation. We show that our results are robust not only considering possible difficulties in subtracting astrophysical foregrounds from the primary CMB signal but also when the minimal cosmological model (\ensuremathΛ Mixed Dark Matter) is generalized in order to include a possible scalar tilt running, a constant equation-of-state parameter for the dark energy and/or extra relativistic degrees of freedom.