B-L Conserved Baryogenesis

Details B-L Conserved Baryogenesis B-L Conserved Baryogenesis

2007-12-17

arxiv.org/abs/0712.2793v2

Mod.Phys.Lett.A23:2047-2051,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages. References added

Scientific paper

10.1142/S0217732308027357

In the presence of anomaly induced sphaleron process, only a B-L asymmetry can be partially converted to the baryon asymmetry while any B+L asymmetry would be completely erased. Thus in any successful baryogenesis theories, B-L is usually violated above the electroweak scale to explain the observed matter-antimatter asymmetry of the universe. However, if any lepton asymmetry is not affected by the sphaleron processes, a B-L conserved theory can still realize the baryogenesis. We present here an SU(5) GUT realization of this scenario, which naturally accommodates small masses of Dirac neutrinos.

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