Can the string scale be related to the cosmic baryon asymmetry?

Details Can the string scale be related to the cosmic baryon asymmetry? Can the string scale be related to the cosmic baryon asymmetry?

2004-09-01

arxiv.org/abs/hep-th/0409014v2

JCAP 0606 (2006) 018

Physics

High Energy Physics

High Energy Physics - Theory

12 Pages, typo corrected in the text

Scientific paper

10.1088/1475-7516/2006/06/018

In a previous work, a mechanism was presented by which baryon asymmetry can be generated during inflation from elliptically polarized gravitons. Nonetheless, the mechanism only generated a realistic baryon asymmetry under special circumstances which requires an enhancement of the lepton number from an unspecified GUT. In this note we provide a stringy embedding of this mechanism through the Green-Schwarz mechanism, demonstrating that if the model-independent axion is the source of the gravitational waves responsible for the lepton asymmetry, one can observationally constrain the string scale and coupling.

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