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arXiv:astro-ph/0402522 (astro-ph)
[Submitted on 23 Feb 2004 (v1), last revised 9 Jun 2004 (this version, v3)]

Title:Solving the discrepancy among the light elements abundances and WMAP

Authors:Kazuhide Ichikawa, Masahiro Kawasaki, Fuminobu Takahashi
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Abstract: 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 $^4$He or $^7$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 $Q$-balls.
Comments: 8 pages, 5 figures;(v2) Sec I and II-A are extended, 2 figures are added
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0402522
  (or arXiv:astro-ph/0402522v3 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0402522
Journal reference: Phys.Lett. B597 (2004) 1-10
Related DOI: https://doi.org/10.1016/j.physletb.2004.07.011

Submission history

From: Masahiro Kawasaki [view email]
[v1] Mon, 23 Feb 2004 08:12:16 UTC (619 KB)
[v2] Fri, 23 Apr 2004 07:31:11 UTC (420 KB)
[v3] Wed, 9 Jun 2004 07:08:18 UTC (420 KB)
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