Reheating-temperature independence of cosmological baryon asymmetry in Affleck-Dine leptogenesis

Journal Article · Fri Jun 15 04:00:00 EDT 2001 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.63.123513· OSTI ID:40203147

Fujii, Masaaki; Hamaguchi, K; Yanagida, T

In this paper we point out that the cosmological baryon asymmetry in our universe is generated almost independently of the reheating temperature T{sub R} in Affleck-Dine leptogenesis and it is determined mainly by the mass of the lightest neutrino, m{sub nu1}, in a wide range of reheating temperature T{sub R}{approx_equal}10{sup 5}-10{sup 12} GeV. The present baryon asymmetry predicts the m{sub nu1} in a narrow region m{sub nu1}{approx_equal}(0.1-3)x10{sup {minus}9} eV. Such a small mass of the lightest neutrino leads to a high predictability on the mass parameter m{sub nuenue} contributing to the neutrinoless double beta decay. We also propose an explicit model in which such an ultralight neutrino can be naturally obtained.

• Sponsoring Organization: (US)
• OSTI ID: 40203147
• Journal Information: Physical Review D, Journal Name: Physical Review D Journal Issue: 12 Vol. 63; ISSN 0556-2821
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
BARYONS
DOUBLE BETA DECAY
NEUTRINOS
UNIVERSE