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The Small Observed Baryon Asymmetry from a Large Lepton Asymmetry

Abstract:

Primordial Big-Bang Nucleosynthesis (BBN) tightly constrains the existence of any additional relativistic degrees of freedom at that epoch. However a large asymmetry in electron neutrino number shifts the chemical equilibrium between the neutron and proton at neutron freeze-out and allows such additional particle species. Moreover, the BBN itself may also prefer such an asymmetry to reconcile predicted element abundances and observations. However, such a large asymmetry appears to be in confl...

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Publication status:
Published

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Authors


March-Russell, J More by this author
Murayama, H More by this author
Journal:
JHEP
Volume:
9911
Issue:
11
Pages:
015
Publication date:
1999-08-18
DOI:
EISSN:
1029-8479
ISSN:
1029-8479
URN:
uuid:e82e60bd-a6fd-43e0-81c0-0b8d454fa361
Source identifiers:
19000
Local pid:
pubs:19000
Language:
English
Keywords:

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