Protecting the primordial baryon asymmetry in the seesaw model compatible with WMAP and KamLAND

Details Protecting the primordial baryon asymmetry in the seesaw model compatible with WMAP and KamLAND Protecting the primordial baryon asymmetry in the seesaw model compatible with WMAP and KamLAND

2003-09-09

arxiv.org/abs/hep-ph/0309098v2

Phys.Rev. D69 (2004) 013002

Physics

High Energy Physics

High Energy Physics - Phenomenology

21pages; added references

Scientific paper

10.1103/PhysRevD.69.013002

We require that the primordial baryon asymmetry is not washed out in the seesaw model compatible with the recent results of WMAP and the neutrino oscillation experiments including the first results of KamLAND. We find that only the case of the normal neutrino mass hierarchy with an approximate $L_{e}$-symmetry satisfies the requirement. We further derive, depending on the signs of neutrino mass eigenvalues, three types of neutrino mass matrixes, where the values of each element are rather precisely fixed.

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