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

页码：4798 / 4801

页数：4

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