Leptogenesis with Heavy Majorana Neutrinos Reexamined

Details Leptogenesis with Heavy Majorana Neutrinos Reexamined Leptogenesis with Heavy Majorana Neutrinos Reexamined

1999-08-19

arxiv.org/abs/hep-ph/9908417v2

Phys.Rev. D61 (2000) 043509

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, LaTex, 1 figure included. 2 footnotes and 1 reference added

Scientific paper

10.1103/PhysRevD.61.043509

The mass term for Majorana neutrinos explicitly violates lepton number. Several authors have used this fact to create a lepton asymmetry in the universe by considering CP violating effects in the one loop self-energy correction for the decaying heavy Majorana neutrino. We compare and comment on the different approaches used to calculate the lepton asymmetry including those using an effective Hamiltonian and resummed propagators. We also recalculate the asymmetry in the small mass difference limit.

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