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

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

2009-06-18

arxiv.org/abs/0906.3369v1

Nucl.Phys.Proc.Suppl.194:254-259,2009

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Proceedings of the GGI-Dark Matter and Dark Energy 2009 Workshop

Scientific paper

10.1016/j.nuclphysbps.2009.07.08

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_\nu~0.12eV each flavor). We assume DE to be a self--interacting scalar field and use a standard Monte Carlo Markov Chain approach.

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