Solving the discrepancy among the light elements abundances and WMAP
天体物理学
2009-11-10 v3
摘要
Within the standard big bang nucleosynthesis (BBN) and cosmic microwave background (CMB) framework, the baryon density measured by the Wilkinson Microwave Anisotropy Probe (WMAP) or the primordial D abundance is much higher than the one measured by the He or Li abundances. To solve the discrepancy, we propose a scenario in which additional baryons appear after BBN. We show that simply adding the baryons can not be a solution but the existence of a large lepton asymmetry before BBN makes the scenario successful. These extra baryons and leptons, in addition to the initial baryons which exist before the BBN, can be all produced from -balls.
引用
@article{arxiv.astro-ph/0402522,
title = {Solving the discrepancy among the light elements abundances and WMAP},
author = {Kazuhide Ichikawa and Masahiro Kawasaki and Fuminobu Takahashi},
journal= {arXiv preprint arXiv:astro-ph/0402522},
year = {2009}
}
备注
8 pages, 5 figures;(v2) Sec I and II-A are extended, 2 figures are added