Baryogenesis through leptogenesis

Details Baryogenesis through leptogenesis Baryogenesis through leptogenesis

1999-11-11

arxiv.org/abs/hep-ph/9911315v4

Nucl.Phys.B575:61-77,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages. v4: revised using the corrected Boltzmann equations of hep-ph/0310123

Scientific paper

10.1016/S0550-3213(00)00011-0

Baryogenesis by heavy-neutrino decay and sphaleron reprocessing of both baryon and lepton number is reconsidered, paying special attention to the flavour structure of the general evolution equations and developing an approximate but sufficiently accurate analytic solution to the prototype evolution equation. Two different models of neutrino masses are examined, based on an Abelian U(1) or a non-Abelian U(2) family symmetry. We show that a consistent picture of baryogenesis can emerge in both cases, although with significant differences.

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