期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 3, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2012/03/040
关键词
dark matter theory; particle physics - cosmology connection; cosmological neutrinos; physics of the early universe
资金
- Friedrich-Ebert-Foundation
- Deutsche Forschungsgemeinschaft [IRTG 881]
- US-DOE at CWRU
We investigate how large lepton asymmetries affect the evolution of the early universe at times before big bang nucleosynthesis and in particular how they influence the relic density of WIMP dark matter. In comparison to the standard calculation of the relic WIMP abundance we find a decrease, depending on the lepton flavour asymmetry. We find an effect of up to 20 per cent for lepton flavour asymmetries l(f) = O (0.1).
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