Naturally large cosmological neutrino asymmetries in the minimal supersymmetric standard model

被引：52
|
作者：
McDonald, J [1 ]
机构：
[1] Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland
来源：
PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 21期
关键词：
D O I：
10.1103/PhysRevLett.84.4798
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A large neutrino asymmetry could have significant observable consequences for nucleosynthesis and the cosmic microwave background. If the baryon asymmetry originates via the Affleck-Dine mechanism along a d = 4 flat direction of the scalar potential in the minimal supersymmetric standard model and if the lepton asymmetry originates via Affleck-Dine leptogenesis along a d = 6 direction, corresponding to the lowest dimension directions conserving R parity, then the ratio n(L)/n(B) is naturally in the range 10(8) - 10(9). As a result, a potentially observable neutrino asymmetry is correlated with it baryon asymmetry of the order of 10(-10).
引用
收藏
页码：4798 / 4801
页数：4
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