Leptogenesis by curvature coupling of heavy neutrinos

Details Leptogenesis by curvature coupling of heavy neutrinos Leptogenesis by curvature coupling of heavy neutrinos

2011-07-06

arxiv.org/abs/1107.1213v1

Phys.Rev.D84:023509,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages. Accepted for publication in PRD

Scientific paper

10.1103/PhysRevD.84.023509

We introduce a CP violating coupling between the Ricci curvature and the heavy right handed neutrinos. This splits the Majorana masses of the left and the right handed heavy neutrinos. When the heavy neutrinos decay, their decay rates are different into left and right chirality light neutrinos. A time varying non-zero Ricci curvature can give rise to a net lepton asymmetry. The source of a non-zero curvature in a radiation era is the quantum fluctations of primordial fields.

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