Leptogenesis from Gravity Waves in Models of Inflation

Details Leptogenesis from Gravity Waves in Models of Inflation Leptogenesis from Gravity Waves in Models of Inflation

2004-03-05

arxiv.org/abs/hep-th/0403069v3

Phys.Rev.Lett.96:081301,2006

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, 0 figures, references added, estimates adjusted

Scientific paper

10.1103/PhysRevLett.96.081301

We present a new mechanism for creating the observed cosmic matter-antimatter asymmetry which satisfies all three Sakharov conditions from one common thread, gravitational waves. We generate lepton number through the gravitational anomaly in the lepton number current. The source term comes from elliptically polarizated gravity waves that are produced during inflation if the inflaton field contains a CP-odd component. In simple inflationary scenarios, the generated matter asymmetry is very small. We describe some special conditions in which our mechanism can give a matter asymmetry of realistic size.

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