Solving the discrepancy among the light elements abundances and WMAP

Preprint

9 June 2004

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.astro-ph/0402522

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.

Keywords

All Related Versions

Version 1, 2004-02-23, ArXiv
Version 2, 2004-04-23, ArXiv
Version 3, 2004-06-09, ArXiv
Published version: Physics Letters B, 597 (1), 1.

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