Leptogenesis with many neutrinos

Journal Article · Fri Feb 15 00:00:00 EST 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.043510· OSTI ID:21039098

Eisele, Marc-Thomas ^[1]

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1. Physik-Department, Technische Universitaet Muenchen, James-Franck-Strasse, 85748 Garching (Germany)

We consider leptogenesis in scenarios with many neutrino singlets. We find that the lower bound for the reheating temperature can be significantly relaxed with respect to the hierarchical three neutrino case. We further argue that the upper bound for the neutrino mass scale from leptogenesis gets significantly lifted in these scenarios. As a specific realization, we then discuss an extradimensional model, where the large number of neutrinos is provided by Kaluza-Klein excitations.

• OSTI ID: 21039098
• Journal Information: Physical Review. D, Particles Fields, Vol. 77, Issue 4; Other Information: DOI: 10.1103/PhysRevD.77.043510; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COSMOLOGY
EXCITATION
KALUZA-KLEIN THEORY
NEUTRINOS
PARTICLE PRODUCTION
QUANTUM FIELD THEORY
REST MASS