Naturally Large Cosmological Neutrino Asymmetries in the Minimal Supersymmetric Standard Model

McDonald, John (2000) Naturally Large Cosmological Neutrino Asymmetries in the Minimal Supersymmetric Standard Model. Physical review letters, 84 (21). pp. 4798-4801. ISSN 1079-7114

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Abstract

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 nL/nB is naturally in the range 108–109. As a result, a potentially observable neutrino asymmetry is correlated with a baryon asymmetry of the order of 10-10.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
63127
Deposited By:
Deposited On:
22 Mar 2013 16:56
Refereed?:
Yes
Published?:
Published
Last Modified:
22 Nov 2020 10:14