2006/02/28 by A. Goobar, Ariel Goobar, Steen Hannestad +3 · 5 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Neutrino Physics Research #Particle physics theoretical and experimental studies #astro-ph #hep-ph
paper · pdf · doi:10.1088/1475-7516/2006/06/019
published as JCAP 0606:019,2006 · 13 pages, 3 figures, matches version to appear in JCAP. The paper now includes an analysis with the WMAP-3 data. It also includes an improved analysis of the SDSS Baryon Acoustic Oscillation data, providing a new analytic fitting formula for the inclusion of non-zero neutrino masses in the BAO data analysis
arxiv created 2006/05/29 · openalex publication_date 2006/06/21 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We have studied bounds on the neutrino mass using new data from the WMAP 3 year data, the Sloan Digital Sky Survey measurement of the baryon acoustic (BAO) peak, the Type Ia supernovae from SNLS, and the Lyman-α forest. We find that even in the most general models with a running spectral index where the number of neutrinos and the dark energy equation of state are allowed to vary, the 95% confidence limit (C.L.) bound on the sum of neutrino masses is eV (95% C.L.), a bound which we believe to be robust. In the more often used constrained analysis with N ν = 3, w = −1, and α s = 0, we find a bound of 0.48 eV without using the Lyman-α data. If the Lyman-α data are used, the bound shrinks to eV (95% C.L.), depending strongly on the Lyman-α analysis used. Finally, we have also calculated how the effective A -parameter used in the SDSS BAO analyses changes under the influence of a non-zero neutrino mass. We find that A = 0.469( n /0.98) −0.35 (1+0.94Ω ν /Ω m ) ± 0.017.