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 ν-masses are allowed. Furthermore, models with a significant coupling and ν-mass are statistically favoured in respect to a cosmology with no coupling and negligible neutrino mass (our best fits are: C∼1/2mp, mν∼ 0.12eVperflavor). 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. © 2010 American Institute of Physics.
Bonometto, S., LA VACCA, G., Kristiansen, J., Mainini, R., Colombo, L. (2010). Do WMAP data favor neutrino mass and a coupling between cold dark matter and dark energy?. In AIP Conference Proceedings (pp.735-740). AMER INST PHYSICS [10.1063/1.3462710].
Do WMAP data favor neutrino mass and a coupling between cold dark matter and dark energy?
BONOMETTO, SILVIO;LA VACCA, GIUSEPPESecondo
;MAININI, ROBERTOPenultimo
;
2010
Abstract
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 ν-masses are allowed. Furthermore, models with a significant coupling and ν-mass are statistically favoured in respect to a cosmology with no coupling and negligible neutrino mass (our best fits are: C∼1/2mp, mν∼ 0.12eVperflavor). 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. © 2010 American Institute of Physics.
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