Coupling active and sterile neutrinos in the cosmon plus seesaw framework
arXiv:0911.0446 · doi:10.1016/j.physletb.2010.01.012
Abstract
The cosmological evolution of neutrino energy densities driven by cosmon-type field equations is introduced assuming that active and sterile neutrinos are intrinsically connected by cosmon fields through the {\em seesaw} mechanism. Interpreting sterile neutrinos as dark matter adiabatically coupled with dark energy results in a natural decoupling of (active) mass varying neutrino (MaVaN) equations. Identifying the dimensionless scale of the {\em seesaw} mechanism, , with a power of the cosmological scale factor, , allows for embedding the resulting masses into the generalized Chaplygin gas (GCG) scenario for the dark sector. Without additional assumptions, our findings establish a precise connection among three distinct frameworks: the cosmon field dynamics for MaVaN's, the {\em seesaw} mechanism for dynamical mass generation and the GCG scenario. Our results also corroborate with previous assertions that mass varying particles can be the right responsible for the stability issue and for the cosmic acceleration of the universe.
12 pages, 2 figures
References in corpus (12)
- Cosmology and the Fate of Dilatation Symmetry
- Massive neutrinos and cosmology
- Growing Matter
- Growing neutrinos and cosmological selection
- Adiabatic instability in coupled dark energy-dark matter models
- Neutrino Dark Energy -- Revisiting the Stability Issue
- Neutrino clustering in growing neutrino quintessence
- Phenomenology of the nMSSM from colliders to cosmology
- The Higgs portal and an unified model for dark energy and dark matter
- Naturalness of exponential cosmon potentials and the cosmological constant problem
- Perturbative approach for mass varying neutrinos coupled to the dark sector in the generalized Chaplygin gas scenario
- Stationary condition in a perturbative approach for mass varying neutrinos