Dark Radiation Emerging After Big Bang Nucleosynthesis?
Cosmology and Nongalactic Astrophysics
2011-05-10 v3 High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
We show how recent data from observations of the cosmic microwave background may suggest the presence of additional radiation density which appeared after big bang nucleosynthesis. We propose a general scheme by which this radiation could be produced from the decay of non-relativistic matter, we place constraints on the properties of such matter, and we give specific examples of scenarios in which this general scheme may be realized.
Cite
@article{arxiv.1011.3501,
title = {Dark Radiation Emerging After Big Bang Nucleosynthesis?},
author = {Willy Fischler and Joel Meyers},
journal= {arXiv preprint arXiv:1011.3501},
year = {2011}
}
Comments
v3: 5 pages, 1 figure. References added, typos corrected, notation changed throughout. v2: 5 pages, 1 figure. Reformatted, references added, acknowledgments updated, effect of radiation on CMB clarified. v1: 11 pages, 1 figure