Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-05-15
Mod.Phys.Lett.A22:2131-2142,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 8 figures, Present in conferences COSPA-2006, NEPSE-2007 and Yong-Pyung APCTP-2007
Scientific paper
10.1142/S0217732307025388
We present cosmological perturbation theory in neutrino probe interacting dark-energy models, and calculate cosmic microwave background anisotropies and matter power spectrum. In these models, the evolution of the mass of neutrinos is determined by the quintessence scalar field, which is responsible for the cosmic acceleration today. We consider several types of scalar field potentials and put constraints on the coupling parameter between neutrinos and dark energy. Assuming the flatness of the universe, the constraint we can derive from the current observation is $\sum m_{\nu} < 0.87 eV$ at the 95 % confidence level for the sum over three species of neutrinos.
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