Leptogenesis from Spin-Gravity Coupling Following Inflation

Details Leptogenesis from Spin-Gravity Coupling Following Inflation Leptogenesis from Spin-Gravity Coupling Following Inflation

2005-08-10

arxiv.org/abs/gr-qc/0508037v2

Phys.Rev.Lett. 96 (2006) 071302

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Journal version (accepted for publication in Phys. Rev. Lett.)

Scientific paper

10.1103/PhysRevLett.96.071302

The energy levels of the left and the right handed neutrinos is split in the background of gravitational waves generated during inflation which in presence of lepton number violating interactions gives rise to a net lepton asymmetry at equilibrium. Lepton number violation is achieved by the same dimension five operator which gives rise to neutrino masses after electro-weak symmetry breaking. A net baryon asymmetry of the same magnitude can be generated from this lepton asymmetry by electroweak sphaleron processes.

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