12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Naturally Large Cosmological Neutrino Asymmetri...
View graph of relations

« Back

Naturally Large Cosmological Neutrino Asymmetries in the Minimal Supersymmetric Standard Model

Research output: Contribution to journalJournal article

Published

Journal publication date22/05/2000
JournalPhysical Review Letters
Journal number21
Volume84
Number of pages4
Pages4798-4801
Original languageEnglish

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.