Relic neutrino asymmetry evolution from first principles
High Energy Physics - Phenomenology
2009-12-30 v3 Astrophysics
Abstract
The exact Quantum Kinetic Equations for a two-flavour active-sterile neutrino system are used to provide a systematic derivation of approximate evolution equations for the relic neutrino asymmetry. An extension of the adiabatic approximation for matter-affected neutrino oscillations is developed which incorporates decoherence due to collisions. Exact and approximate expressions for the decoherence and repopulation functions are discussed. A first pass is made over the exact treatment of multi-flavour partially incoherent oscillations.
Cite
@article{arxiv.hep-ph/9809363,
title = {Relic neutrino asymmetry evolution from first principles},
author = {Nicole F. Bell and Raymond R. Volkas and Yvonne Y. Y. Wong},
journal= {arXiv preprint arXiv:hep-ph/9809363},
year = {2009}
}
Comments
RevTeX, 38 pages, crucial typos corrected; published version