Do WMAP data favor neutrino mass and a coupling between Cold Dark Matter and Dark Energy ?

2009/06/18 by G. La Vacca, J. Kristiansen, J. R. Kristiansen +4
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #astro-ph.CO

paper · pdf · doi:10.1016/j.nuclphysbps.2009.07.088

published as Nucl.Phys.Proc.Suppl.194:254-259,2009 · Proceedings of the GGI-Dark Matter and Dark Energy 2009 Workshop

arxiv created 2009/06/18 · openalex publication_date 2009/10/01 · openalex created_date 2022/05/12 · openalex updated_date 2026/07/28

Abstract

We allow simultaneously for a CDM--DE coupling and non--zero neutrino masses and find that significant coupling and neutrino mass are (slightly) statistically favoured in respect to a cosmology with no coupling and negligible neutrino mass (our best fits are: C~1/2m_p, m_ν~0.12eV each flavor). We assume DE to be a self--interacting scalar field and use a standard Monte Carlo Markov Chain approach.

Citations

• Measurements of Ω and Λ from 42 High‐Redshift Supernovae
• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant