2005/05/31 by Steen Hannestad · 2 citations
Physics and Astronomy · #Astrophysics #Astrophysics and Cosmic Phenomena #Cosmological constant #Cosmology #Cosmology and Gravitation Theories #Dark energy #Equation of state #Mathematical physics #Neutrino #Neutrino Physics Research #Particle physics #Physics #Quantum mechanics #astro-ph #hep-ph
paper · pdf · doi:10.1103/physrevlett.95.221301
published as Phys.Rev.Lett.95:221301,2005 · 4 pages, 3 figures, minor changes, matches version to appear in PRL
arxiv created 2005/10/12 · openalex publication_date 2005/11/23 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
At present, cosmology provides the nominally strongest constraint on the masses of standard model neutrinos. However, this constraint is extremely dependent on the nature of the dark energy component of the Universe. When the dark energy equation of state parameter is taken as a free (but constant) parameter, the neutrino mass bound is sigma m(v) < or = 1.48 eV (95% C.L.), compared with sigma m(v) < or = 0.65 eV (95% C.L.) in the standard model where the dark energy is in the form of a cosmological constant. This has important consequences for future experiments aimed at the direct measurement of neutrino masses. We also discuss prospects for future cosmological measurements of neutrino masses.