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

Journal Article · Wed Jun 23 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3462710· OSTI ID:21410205

Bonometto, S A; La Vacca, G ^[1]; Kristiansen, J R; Mainini, R ^[2]; Colombo, L P. L. ^[3]

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1. Department of Physics G. Occhialini-Milano-Bicocca University, Piazza della Scienza 3, 20126 Milano (Italy)
2. Institute of Theoretical Astrophysics, University of Oslo, Box 1029, 0315 Oslo (Norway)
3. Department of Physics and Astronomy, University of Southern California, Los Angeles, CA 90089-0484 (United States)

We fit WMAP5 and related data by allowing for a CDM-DE coupling and non-zero neutrino masses, simultaneously. We find a significant correlation between these parameters, so that simultaneous higher coupling and {nu}-masses are allowed. Furthermore, models with a significant coupling and {nu}-mass are statistically favoured in respect to a cosmology with no coupling and negligible neutrino mass (our best fits are: C{approx}1/2 m{sub p}, m{sub {nu}{approx}0}.12 eV per flavor). We use a standard Monte Carlo Markov Chain approach, by assuming DE to be a scalar field self-interacting through Ratra-Peebles or SUGRA potentials.

• OSTI ID: 21410205
• Journal Information: AIP Conference Proceedings, Vol. 1241, Issue 1; Conference: Conference on invisible universe, Paris (France), 29 Jun - 3 Jul 2009; Other Information: DOI: 10.1063/1.3462710; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CORRELATIONS
COSMOLOGY
COUPLING
FLAVOR MODEL
MARKOV PROCESS
MASS
MONTE CARLO METHOD
NEUTRINOS
NONLUMINOUS MATTER
PARTIAL DIFFERENTIAL EQUATIONS
SCALAR FIELDS
CALCULATION METHODS
COMPOSITE MODELS
DIFFERENTIAL EQUATIONS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATTER
PARTICLE MODELS
QUARK MODEL
STOCHASTIC PROCESSES